This is an automated email from the ASF dual-hosted git repository.

zhangduo pushed a commit to branch HBASE-22120
in repository https://gitbox.apache.org/repos/asf/hbase.git

commit 968e4f123a778f0873a0a579021947bbed5ebf2e
Author: Duo Zhang <zhang...@apache.org>
AuthorDate: Wed Dec 9 23:28:50 2020 +0800

    HBASE-25373 Remove HTrace completely in code base and try to make use of 
OpenTelemetry
    
    Signed-off-by: stack <st...@apache.org>
---
 .../hadoop/hbase/io/asyncfs/AsyncFSTestBase.java   |   4 -
 hbase-client/pom.xml                               |   4 +-
 .../hadoop/hbase/ipc/BlockingRpcConnection.java    |  11 +-
 .../java/org/apache/hadoop/hbase/ipc/Call.java     |   7 +-
 hbase-common/pom.xml                               |   4 +-
 .../hbase/trace/HBaseHTraceConfiguration.java      |  80 -----------
 .../hadoop/hbase/trace/SpanReceiverHost.java       | 120 -----------------
 .../org/apache/hadoop/hbase/trace/TraceUtil.java   | 105 +--------------
 hbase-external-blockcache/pom.xml                  |   4 -
 .../hadoop/hbase/io/hfile/MemcachedBlockCache.java |  14 +-
 hbase-it/pom.xml                                   |   4 +-
 .../hadoop/hbase/mttr/IntegrationTestMTTR.java     |  21 +--
 .../trace/IntegrationTestSendTraceRequests.java    | 127 +++++++++---------
 hbase-mapreduce/pom.xml                            |   4 +-
 .../apache/hadoop/hbase/PerformanceEvaluation.java |  29 ++--
 hbase-protocol-shaded/pom.xml                      |   4 -
 hbase-server/pom.xml                               |   4 +-
 .../apache/hadoop/hbase/executor/EventHandler.java |  16 ++-
 .../hadoop/hbase/io/hfile/HFileReaderImpl.java     |  11 +-
 .../org/apache/hadoop/hbase/ipc/CallRunner.java    |  37 +++---
 .../org/apache/hadoop/hbase/master/HMaster.java    |   2 -
 .../hadoop/hbase/master/HMasterCommandLine.java    |   6 +-
 .../apache/hadoop/hbase/regionserver/HRegion.java  |  15 ++-
 .../hadoop/hbase/regionserver/HRegionServer.java   |   9 --
 .../regionserver/HRegionServerCommandLine.java     |   8 +-
 .../hadoop/hbase/regionserver/MemStoreFlusher.java |  14 +-
 .../hbase/regionserver/wal/AbstractFSWAL.java      |  19 ++-
 .../hadoop/hbase/regionserver/wal/AsyncFSWAL.java  |  17 ++-
 .../hadoop/hbase/regionserver/wal/FSHLog.java      |  22 +--
 .../apache/hadoop/hbase/HBaseTestingUtility.java   |   4 -
 .../hadoop/hbase/TestExecutorStatusChore.java      |   8 +-
 .../hadoop/hbase/executor/TestExecutorService.java |   4 +-
 .../apache/hadoop/hbase/trace/TestHTraceHooks.java | 134 -------------------
 .../org/apache/hadoop/hbase/trace/TraceTree.java   | 148 ---------------------
 .../hadoop/hbase/wal/WALPerformanceEvaluation.java |  73 +++-------
 hbase-shaded/hbase-shaded-client/pom.xml           |   1 +
 hbase-shaded/hbase-shaded-testing-util/pom.xml     |   1 +
 hbase-shaded/pom.xml                               |   1 +
 hbase-shell/src/main/ruby/shell/commands/trace.rb  |  43 +++---
 hbase-zookeeper/pom.xml                            |   4 +
 .../hbase/zookeeper/RecoverableZooKeeper.java      |  65 ++++++---
 pom.xml                                            |  30 ++++-
 42 files changed, 341 insertions(+), 897 deletions(-)

diff --git 
a/hbase-asyncfs/src/test/java/org/apache/hadoop/hbase/io/asyncfs/AsyncFSTestBase.java
 
b/hbase-asyncfs/src/test/java/org/apache/hadoop/hbase/io/asyncfs/AsyncFSTestBase.java
index 9b276ac..971c7f9 100644
--- 
a/hbase-asyncfs/src/test/java/org/apache/hadoop/hbase/io/asyncfs/AsyncFSTestBase.java
+++ 
b/hbase-asyncfs/src/test/java/org/apache/hadoop/hbase/io/asyncfs/AsyncFSTestBase.java
@@ -19,11 +19,9 @@ package org.apache.hadoop.hbase.io.asyncfs;
 
 import java.io.File;
 import java.io.IOException;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
-import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -103,8 +101,6 @@ public abstract class AsyncFSTestBase {
       .setLevel(org.apache.log4j.Level.ERROR);
     
org.apache.log4j.Logger.getLogger(org.apache.hadoop.metrics2.impl.MetricsSystemImpl.class)
       .setLevel(org.apache.log4j.Level.ERROR);
-
-    TraceUtil.initTracer(conf);
     CLUSTER = new MiniDFSCluster.Builder(conf).numDataNodes(servers).build();
     CLUSTER.waitClusterUp();
   }
diff --git a/hbase-client/pom.xml b/hbase-client/pom.xml
index 63e81d9..45cdf88 100644
--- a/hbase-client/pom.xml
+++ b/hbase-client/pom.xml
@@ -133,8 +133,8 @@
       <artifactId>zookeeper</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
     </dependency>
     <dependency>
       <groupId>org.jruby.jcodings</groupId>
diff --git 
a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/BlockingRpcConnection.java
 
b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/BlockingRpcConnection.java
index cd8035f..1a5cb73 100644
--- 
a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/BlockingRpcConnection.java
+++ 
b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/BlockingRpcConnection.java
@@ -24,6 +24,9 @@ import static 
org.apache.hadoop.hbase.ipc.IPCUtil.isFatalConnectionException;
 import static org.apache.hadoop.hbase.ipc.IPCUtil.setCancelled;
 import static org.apache.hadoop.hbase.ipc.IPCUtil.write;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Context;
+import io.opentelemetry.context.Scope;
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
 import java.io.DataInputStream;
@@ -62,7 +65,6 @@ import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.StringUtils;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -593,9 +595,12 @@ class BlockingRpcConnection extends RpcConnection 
implements Runnable {
   }
 
   private void tracedWriteRequest(Call call) throws IOException {
-    try (TraceScope ignored = 
TraceUtil.createTrace("RpcClientImpl.tracedWriteRequest",
-          call.span)) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RpcClientImpl.tracedWriteRequest")
+      .setParent(Context.current().with(call.span)).startSpan();
+    try (Scope scope = span.makeCurrent()) {
       writeRequest(call);
+    } finally {
+      span.end();
     }
   }
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/Call.java 
b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/Call.java
index ccd92cc..cf33fff 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/Call.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/Call.java
@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.hbase.ipc;
 
+import io.opentelemetry.api.trace.Span;
 import java.io.IOException;
 import java.util.Optional;
 import org.apache.commons.lang3.builder.ToStringBuilder;
@@ -24,13 +25,13 @@ import org.apache.commons.lang3.builder.ToStringStyle;
 import org.apache.hadoop.hbase.CellScanner;
 import org.apache.hadoop.hbase.client.MetricsConnection;
 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.Tracer;
 import org.apache.yetus.audience.InterfaceAudience;
+
 import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors;
 import org.apache.hbase.thirdparty.com.google.protobuf.Message;
 import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;
 import org.apache.hbase.thirdparty.io.netty.util.Timeout;
+
 import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
 
 /** A call waiting for a value. */
@@ -73,7 +74,7 @@ class Call {
     this.timeout = timeout;
     this.priority = priority;
     this.callback = callback;
-    this.span = Tracer.getCurrentSpan();
+    this.span = Span.current();
   }
 
   /**
diff --git a/hbase-common/pom.xml b/hbase-common/pom.xml
index 8b91541..f168545 100644
--- a/hbase-common/pom.xml
+++ b/hbase-common/pom.xml
@@ -193,8 +193,8 @@
     </dependency>
     <!-- tracing Dependencies -->
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
     </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>
diff --git 
a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/HBaseHTraceConfiguration.java
 
b/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/HBaseHTraceConfiguration.java
deleted file mode 100644
index 03d03d9..0000000
--- 
a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/HBaseHTraceConfiguration.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.hadoop.hbase.trace;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.htrace.core.HTraceConfiguration;
-import org.apache.yetus.audience.InterfaceAudience;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-@InterfaceAudience.Private
-public class HBaseHTraceConfiguration extends HTraceConfiguration {
-  private static final Logger LOG = 
LoggerFactory.getLogger(HBaseHTraceConfiguration.class);
-
-  public static final String KEY_PREFIX = "hbase.htrace.";
-
-  private Configuration conf;
-
-  private void handleDeprecation(String key) {
-    String oldKey = "hbase." + key;
-    String newKey = KEY_PREFIX + key;
-    String oldValue = conf.get(oldKey);
-    if (oldValue != null) {
-      LOG.warn("Warning: using deprecated configuration key " + oldKey +
-          ".  Please use " + newKey + " instead.");
-      String newValue = conf.get(newKey);
-      if (newValue == null) {
-        conf.set(newKey, oldValue);
-      } else {
-        LOG.warn("Conflicting values for " + newKey + " and " + oldKey +
-            ".  Using " + newValue);
-      }
-    }
-  }
-
-  public HBaseHTraceConfiguration(Configuration conf) {
-    this.conf = conf;
-    handleDeprecation("local-file-span-receiver.path");
-    handleDeprecation("local-file-span-receiver.capacity");
-    handleDeprecation("sampler.frequency");
-    handleDeprecation("sampler.fraction");
-    handleDeprecation("zipkin.collector-hostname");
-    handleDeprecation("zipkin.collector-port");
-    handleDeprecation("zipkin.num-threads");
-    handleDeprecation("zipkin.traced-service-hostname");
-    handleDeprecation("zipkin.traced-service-port");
-  }
-
-  @Override
-  public String get(String key) {
-    return conf.get(KEY_PREFIX + key);
-  }
-
-  @Override
-  public String get(String key, String defaultValue) {
-    return conf.get(KEY_PREFIX + key,defaultValue);
-
-  }
-
-  @Override
-  public boolean getBoolean(String key, boolean defaultValue) {
-    return conf.getBoolean(KEY_PREFIX + key, defaultValue);
-  }
-}
diff --git 
a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/SpanReceiverHost.java
 
b/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/SpanReceiverHost.java
deleted file mode 100644
index b967db7..0000000
--- 
a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/SpanReceiverHost.java
+++ /dev/null
@@ -1,120 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.hbase.trace;
-
-import java.io.IOException;
-import java.util.Collection;
-import java.util.HashSet;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.htrace.core.SpanReceiver;
-import org.apache.yetus.audience.InterfaceAudience;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * This class provides functions for reading the names of SpanReceivers from
- * hbase-site.xml, adding those SpanReceivers to the Tracer, and closing those
- * SpanReceivers when appropriate.
- */
-@InterfaceAudience.Private
-public class SpanReceiverHost {
-  public static final String SPAN_RECEIVERS_CONF_KEY = 
"hbase.trace.spanreceiver.classes";
-  private static final Logger LOG = 
LoggerFactory.getLogger(SpanReceiverHost.class);
-  private Collection<SpanReceiver> receivers;
-  private Configuration conf;
-  private boolean closed = false;
-
-  private enum SingletonHolder {
-    INSTANCE;
-    final transient Object lock = new Object();
-    transient SpanReceiverHost host = null;
-  }
-
-  public static SpanReceiverHost getInstance(Configuration conf) {
-    synchronized (SingletonHolder.INSTANCE.lock) {
-      if (SingletonHolder.INSTANCE.host != null) {
-        return SingletonHolder.INSTANCE.host;
-      }
-
-      SpanReceiverHost host = new SpanReceiverHost(conf);
-      host.loadSpanReceivers();
-      SingletonHolder.INSTANCE.host = host;
-      return SingletonHolder.INSTANCE.host;
-    }
-
-  }
-
-  public static Configuration getConfiguration(){
-    synchronized (SingletonHolder.INSTANCE.lock) {
-      if (SingletonHolder.INSTANCE.host == null || 
SingletonHolder.INSTANCE.host.conf == null) {
-        return null;
-      }
-
-      return SingletonHolder.INSTANCE.host.conf;
-    }
-  }
-
-  SpanReceiverHost(Configuration conf) {
-    receivers = new HashSet<>();
-    this.conf = conf;
-  }
-
-  /**
-   * Reads the names of classes specified in the {@code 
hbase.trace.spanreceiver.classes} property
-   * and instantiates and registers them with the Tracer.
-   */
-  public void loadSpanReceivers() {
-    String[] receiverNames = conf.getStrings(SPAN_RECEIVERS_CONF_KEY);
-    if (receiverNames == null || receiverNames.length == 0) {
-      return;
-    }
-
-    SpanReceiver.Builder builder = new SpanReceiver.Builder(new 
HBaseHTraceConfiguration(conf));
-    for (String className : receiverNames) {
-      className = className.trim();
-
-      SpanReceiver receiver = builder.className(className).build();
-      if (receiver != null) {
-        receivers.add(receiver);
-        LOG.info("SpanReceiver {} was loaded successfully.", className);
-      }
-    }
-    for (SpanReceiver rcvr : receivers) {
-      TraceUtil.addReceiver(rcvr);
-    }
-  }
-
-  /**
-   * Calls close() on all SpanReceivers created by this SpanReceiverHost.
-   */
-  public synchronized void closeReceivers() {
-    if (closed) {
-      return;
-    }
-
-    closed = true;
-    for (SpanReceiver rcvr : receivers) {
-      try {
-        rcvr.close();
-      } catch (IOException e) {
-        LOG.warn("Unable to close SpanReceiver correctly: " + e.getMessage(), 
e);
-      }
-    }
-  }
-}
diff --git 
a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/TraceUtil.java 
b/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/TraceUtil.java
index 10665d8..f7a111f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/TraceUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/trace/TraceUtil.java
@@ -17,112 +17,19 @@
  */
 package org.apache.hadoop.hbase.trace;
 
-import org.apache.hadoop.conf.Configuration;
-import org.apache.htrace.core.HTraceConfiguration;
-import org.apache.htrace.core.Sampler;
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.SpanReceiver;
-import org.apache.htrace.core.TraceScope;
-import org.apache.htrace.core.Tracer;
+import io.opentelemetry.api.OpenTelemetry;
+import io.opentelemetry.api.trace.Tracer;
 import org.apache.yetus.audience.InterfaceAudience;
 
-/**
- * This wrapper class provides functions for accessing htrace 4+ functionality 
in a simplified way.
- */
 @InterfaceAudience.Private
 public final class TraceUtil {
-  private static HTraceConfiguration conf;
-  private static Tracer tracer;
-
-  private TraceUtil() {
-  }
-
-  public static void initTracer(Configuration c) {
-    if (c != null) {
-      conf = new HBaseHTraceConfiguration(c);
-    }
-
-    if (tracer == null && conf != null) {
-      tracer = new Tracer.Builder("Tracer").conf(conf).build();
-    }
-  }
-
-  /**
-   * Wrapper method to create new TraceScope with the given description
-   * @return TraceScope or null when not tracing
-   */
-  public static TraceScope createTrace(String description) {
-    return (tracer == null) ? null : tracer.newScope(description);
-  }
-
-  /**
-   * Wrapper method to create new child TraceScope with the given description
-   * and parent scope's spanId
-   * @param span parent span
-   * @return TraceScope or null when not tracing
-   */
-  public static TraceScope createTrace(String description, Span span) {
-    if (span == null) {
-      return createTrace(description);
-    }
 
-    return (tracer == null) ? null : tracer.newScope(description, 
span.getSpanId());
-  }
-
-  /**
-   * Wrapper method to add new sampler to the default tracer
-   * @return true if added, false if it was already added
-   */
-  public static boolean addSampler(Sampler sampler) {
-    if (sampler == null) {
-      return false;
-    }
-
-    return (tracer == null) ? false : tracer.addSampler(sampler);
-  }
-
-  /**
-   * Wrapper method to add key-value pair to TraceInfo of actual span
-   */
-  public static void addKVAnnotation(String key, String value){
-    Span span = Tracer.getCurrentSpan();
-    if (span != null) {
-      span.addKVAnnotation(key, value);
-    }
-  }
+  private static final String INSTRUMENTATION_NAME = 
"io.opentelemetry.contrib.hbase";
 
-  /**
-   * Wrapper method to add receiver to actual tracerpool
-   * @return true if successfull, false if it was already added
-   */
-  public static boolean addReceiver(SpanReceiver rcvr) {
-    return (tracer == null) ? false : tracer.getTracerPool().addReceiver(rcvr);
-  }
-
-  /**
-   * Wrapper method to remove receiver from actual tracerpool
-   * @return true if removed, false if doesn't exist
-   */
-  public static boolean removeReceiver(SpanReceiver rcvr) {
-    return (tracer == null) ? false : 
tracer.getTracerPool().removeReceiver(rcvr);
-  }
-
-  /**
-   * Wrapper method to add timeline annotiation to current span with given 
message
-   */
-  public static void addTimelineAnnotation(String msg) {
-    Span span = Tracer.getCurrentSpan();
-    if (span != null) {
-      span.addTimelineAnnotation(msg);
-    }
+  private TraceUtil() {
   }
 
-  /**
-   * Wrap runnable with current tracer and description
-   * @param runnable to wrap
-   * @return wrapped runnable or original runnable when not tracing
-   */
-  public static Runnable wrap(Runnable runnable, String description) {
-    return (tracer == null) ? runnable : tracer.wrap(runnable, description);
+  public static Tracer getGlobalTracer() {
+    return OpenTelemetry.getGlobalTracer(INSTRUMENTATION_NAME);
   }
 }
diff --git a/hbase-external-blockcache/pom.xml 
b/hbase-external-blockcache/pom.xml
index 0b870d8..6c12c86 100644
--- a/hbase-external-blockcache/pom.xml
+++ b/hbase-external-blockcache/pom.xml
@@ -110,10 +110,6 @@
       <artifactId>slf4j-api</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
-    </dependency>
-    <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <scope>test</scope>
diff --git 
a/hbase-external-blockcache/src/main/java/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.java
 
b/hbase-external-blockcache/src/main/java/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.java
index 246d7e0..350d2c7 100644
--- 
a/hbase-external-blockcache/src/main/java/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.java
+++ 
b/hbase-external-blockcache/src/main/java/org/apache/hadoop/hbase/io/hfile/MemcachedBlockCache.java
@@ -19,6 +19,8 @@
 
 package org.apache.hadoop.hbase.io.hfile;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.nio.ByteBuffer;
@@ -27,13 +29,11 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.concurrent.ExecutionException;
-
 import net.spy.memcached.CachedData;
 import net.spy.memcached.ConnectionFactoryBuilder;
 import net.spy.memcached.FailureMode;
 import net.spy.memcached.MemcachedClient;
 import net.spy.memcached.transcoders.Transcoder;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.io.ByteBuffAllocator;
@@ -41,7 +41,6 @@ import org.apache.hadoop.hbase.nio.ByteBuff;
 import org.apache.hadoop.hbase.nio.SingleByteBuff;
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Addressing;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -129,12 +128,12 @@ public class MemcachedBlockCache implements BlockCache {
   }
 
   @Override
-  public Cacheable getBlock(BlockCacheKey cacheKey, boolean caching,
-                            boolean repeat, boolean updateCacheMetrics) {
+  public Cacheable getBlock(BlockCacheKey cacheKey, boolean caching, boolean 
repeat,
+    boolean updateCacheMetrics) {
     // Assume that nothing is the block cache
     HFileBlock result = null;
-
-    try (TraceScope traceScope = 
TraceUtil.createTrace("MemcachedBlockCache.getBlock")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("MemcachedBlockCache.getBlock").startSpan();
+    try (Scope traceScope = span.makeCurrent()) {
       result = client.get(cacheKey.toString(), tc);
     } catch (Exception e) {
       // Catch a pretty broad set of exceptions to limit any changes in the 
memecache client
@@ -146,6 +145,7 @@ public class MemcachedBlockCache implements BlockCache {
       }
       result = null;
     } finally {
+      span.end();
       // Update stats if this request doesn't have it turned off 100% of the 
time
       if (updateCacheMetrics) {
         if (result == null) {
diff --git a/hbase-it/pom.xml b/hbase-it/pom.xml
index f508ffd..866d02e 100644
--- a/hbase-it/pom.xml
+++ b/hbase-it/pom.xml
@@ -228,8 +228,8 @@
       <artifactId>commons-lang3</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
     </dependency>
     <!-- Hadoop needs Netty 3.x at test scope for the minicluster -->
     <dependency>
diff --git 
a/hbase-it/src/test/java/org/apache/hadoop/hbase/mttr/IntegrationTestMTTR.java 
b/hbase-it/src/test/java/org/apache/hadoop/hbase/mttr/IntegrationTestMTTR.java
index d15a9d6..499aeae 100644
--- 
a/hbase-it/src/test/java/org/apache/hadoop/hbase/mttr/IntegrationTestMTTR.java
+++ 
b/hbase-it/src/test/java/org/apache/hadoop/hbase/mttr/IntegrationTestMTTR.java
@@ -21,6 +21,8 @@ package org.apache.hadoop.hbase.mttr;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assume.assumeFalse;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.concurrent.Callable;
@@ -63,9 +65,6 @@ import 
org.apache.hadoop.hbase.testclassification.IntegrationTests;
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.LoadTestTool;
-import org.apache.htrace.core.AlwaysSampler;
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.TraceScope;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -378,12 +377,9 @@ public class IntegrationTestMTTR {
      * @param span Span.  To be kept if the time taken was over 1 second
      */
     public void addResult(long time, Span span) {
-      if (span == null) {
-        return;
-      }
       stats.addValue(TimeUnit.MILLISECONDS.convert(time, 
TimeUnit.NANOSECONDS));
       if (TimeUnit.SECONDS.convert(time, TimeUnit.NANOSECONDS) >= 1) {
-        traces.add(span.getTracerId());
+        traces.add(span.getSpanContext().getTraceIdAsHexString());
       }
     }
 
@@ -423,15 +419,11 @@ public class IntegrationTestMTTR {
       final int maxIterations = 10;
       int numAfterDone = 0;
       int resetCount = 0;
-      TraceUtil.addSampler(AlwaysSampler.INSTANCE);
       // Keep trying until the rs is back up and we've gotten a put through
       while (numAfterDone < maxIterations) {
         long start = System.nanoTime();
-        Span span = null;
-        try (TraceScope scope = TraceUtil.createTrace(getSpanName())) {
-          if (scope != null) {
-            span = scope.getSpan();
-          }
+        Span span = 
TraceUtil.getGlobalTracer().spanBuilder(getSpanName()).startSpan();
+        try (Scope scope = span.makeCurrent()) {
           boolean actionResult = doAction();
           if (actionResult && future.isDone()) {
             numAfterDone++;
@@ -462,7 +454,6 @@ public class IntegrationTestMTTR {
           throw e;
         } catch (RetriesExhaustedException e){
           throw e;
-
         // Everything else is potentially recoverable on the application side. 
For instance, a CM
         // action kills the RS that hosted a scanner the client was using. 
Continued use of that
         // scanner should be terminated, but a new scanner can be created and 
the read attempted
@@ -477,6 +468,8 @@ public class IntegrationTestMTTR {
             LOG.info("Too many unexpected Exceptions. Aborting.", e);
             throw e;
           }
+        } finally {
+          span.end();
         }
         result.addResult(System.nanoTime() - start, span);
       }
diff --git 
a/hbase-it/src/test/java/org/apache/hadoop/hbase/trace/IntegrationTestSendTraceRequests.java
 
b/hbase-it/src/test/java/org/apache/hadoop/hbase/trace/IntegrationTestSendTraceRequests.java
index 342ec60..afe7ba5 100644
--- 
a/hbase-it/src/test/java/org/apache/hadoop/hbase/trace/IntegrationTestSendTraceRequests.java
+++ 
b/hbase-it/src/test/java/org/apache/hadoop/hbase/trace/IntegrationTestSendTraceRequests.java
@@ -18,10 +18,19 @@
 
 package org.apache.hadoop.hbase.trace;
 
+import io.opentelemetry.api.common.AttributeKey;
+import io.opentelemetry.api.common.Attributes;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
+import java.io.IOException;
+import java.util.Random;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.IntegrationTestingUtility;
-import org.apache.hadoop.hbase.testclassification.IntegrationTests;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.BufferedMutator;
@@ -31,23 +40,15 @@ import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.ResultScanner;
 import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.testclassification.IntegrationTests;
 import org.apache.hadoop.hbase.util.AbstractHBaseTool;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.util.ToolRunner;
-import org.apache.htrace.core.Sampler;
-import org.apache.htrace.core.TraceScope;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
 import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;
 
-import java.io.IOException;
-import java.util.Random;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.TimeUnit;
-
 @Category(IntegrationTests.class)
 public class IntegrationTestSendTraceRequests extends AbstractHBaseTool {
 
@@ -61,7 +62,6 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
   private IntegrationTestingUtility util;
   private Random random = new Random();
   private Admin admin;
-  private SpanReceiverHost receiverHost;
 
   public static void main(String[] args) throws Exception {
     Configuration configuration = HBaseConfiguration.create();
@@ -95,7 +95,6 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
   public void internalDoWork() throws Exception {
     util = createUtil();
     admin = util.getAdmin();
-    setupReceiver();
 
     deleteTable();
     createTable();
@@ -108,51 +107,52 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
     service.shutdown();
     service.awaitTermination(100, TimeUnit.SECONDS);
     Thread.sleep(90000);
-    receiverHost.closeReceivers();
     util.restoreCluster();
     util = null;
   }
 
   private void doScans(ExecutorService service, final 
LinkedBlockingQueue<Long> rks) {
+    for (int i = 0; i < 100; i++) {
+      Runnable runnable = new Runnable() {
+        private final LinkedBlockingQueue<Long> rowKeyQueue = rks;
 
-      for (int i = 0; i < 100; i++) {
-        Runnable runnable = new Runnable() {
-          private final LinkedBlockingQueue<Long> rowKeyQueue = rks;
-          @Override
-          public void run() {
-            ResultScanner rs = null;
-            TraceUtil.addSampler(Sampler.ALWAYS);
-            try (TraceScope scope = TraceUtil.createTrace("Scan")){
-              Table ht = util.getConnection().getTable(tableName);
-              Scan s = new Scan();
-              s.withStartRow(Bytes.toBytes(rowKeyQueue.take()));
-              s.setBatch(7);
-              rs = ht.getScanner(s);
-              // Something to keep the jvm from removing the loop.
-              long accum = 0;
-
-              for(int x = 0; x < 1000; x++) {
-                Result r = rs.next();
-                accum |= Bytes.toLong(r.getRow());
-              }
+        @Override
+        public void run() {
+          ResultScanner rs = null;
+          Span span = 
TraceUtil.getGlobalTracer().spanBuilder("Scan").startSpan();
+          try (Scope scope = span.makeCurrent()) {
+            Table ht = util.getConnection().getTable(tableName);
+            Scan s = new Scan();
+            s.withStartRow(Bytes.toBytes(rowKeyQueue.take()));
+            s.setBatch(7);
+            rs = ht.getScanner(s);
+            // Something to keep the jvm from removing the loop.
+            long accum = 0;
+
+            for (int x = 0; x < 1000; x++) {
+              Result r = rs.next();
+              accum |= Bytes.toLong(r.getRow());
+            }
 
-              TraceUtil.addTimelineAnnotation("Accum result = " + accum);
+            span.addEvent("Accum result = " + accum);
 
-              ht.close();
-              ht = null;
-            } catch (IOException e) {
-              e.printStackTrace();
-              TraceUtil.addKVAnnotation("exception", 
e.getClass().getSimpleName());
-            } catch (Exception e) {
-            } finally {
-              if (rs != null) rs.close();
+            ht.close();
+            ht = null;
+          } catch (IOException e) {
+            e.printStackTrace();
+            span.addEvent("exception",
+              Attributes.of(AttributeKey.stringKey("exception"), 
e.getClass().getSimpleName()));
+          } catch (Exception e) {
+          } finally {
+            span.end();
+            if (rs != null) {
+              rs.close();
             }
-
           }
-        };
-        service.submit(runnable);
-      }
-
+        }
+      };
+      service.submit(runnable);
+    }
   }
 
   private void doGets(ExecutorService service, final LinkedBlockingQueue<Long> 
rowKeys)
@@ -173,9 +173,9 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
           }
 
           long accum = 0;
-          TraceUtil.addSampler(Sampler.ALWAYS);
           for (int x = 0; x < 5; x++) {
-            try (TraceScope scope = TraceUtil.createTrace("gets")) {
+            Span span = 
TraceUtil.getGlobalTracer().spanBuilder("gets").startSpan();
+            try (Scope scope = span.makeCurrent()) {
               long rk = rowKeyQueue.take();
               Result r1 = ht.get(new Get(Bytes.toBytes(rk)));
               if (r1 != null) {
@@ -185,10 +185,12 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
               if (r2 != null) {
                 accum |= Bytes.toLong(r2.getRow());
               }
-              TraceUtil.addTimelineAnnotation("Accum = " + accum);
+              span.addEvent("Accum = " + accum);
 
             } catch (IOException|InterruptedException ie) {
               // IGNORED
+            } finally {
+              span.end();
             }
           }
 
@@ -199,18 +201,22 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
   }
 
   private void createTable() throws IOException {
-    TraceUtil.addSampler(Sampler.ALWAYS);
-    try (TraceScope scope = TraceUtil.createTrace("createTable")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("createTable").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       util.createTable(tableName, familyName);
+    } finally {
+      span.end();
     }
   }
 
   private void deleteTable() throws IOException {
-    TraceUtil.addSampler(Sampler.ALWAYS);
-    try (TraceScope scope = TraceUtil.createTrace("deleteTable")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("deleteTable").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       if (admin.tableExists(tableName)) {
         util.deleteTable(tableName);
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -218,9 +224,9 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
     LinkedBlockingQueue<Long> rowKeys = new LinkedBlockingQueue<>(25000);
     BufferedMutator ht = 
util.getConnection().getBufferedMutator(this.tableName);
     byte[] value = new byte[300];
-    TraceUtil.addSampler(Sampler.ALWAYS);
     for (int x = 0; x < 5000; x++) {
-      try (TraceScope traceScope = TraceUtil.createTrace("insertData")) {
+      Span span = 
TraceUtil.getGlobalTracer().spanBuilder("insertData").startSpan();
+      try (Scope scope = span.makeCurrent()) {
         for (int i = 0; i < 5; i++) {
           long rk = random.nextLong();
           rowKeys.add(rk);
@@ -234,6 +240,8 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
         if ((x % 1000) == 0) {
           admin.flush(tableName);
         }
+      } finally {
+        span.end();
       }
     }
     admin.flush(tableName);
@@ -255,11 +263,4 @@ public class IntegrationTestSendTraceRequests extends 
AbstractHBaseTool {
     }
     return this.util;
   }
-
-  private void setupReceiver() {
-    Configuration conf = new Configuration(util.getConfiguration());
-    conf.setBoolean("hbase.zipkin.is-in-client-mode", true);
-
-    this.receiverHost = SpanReceiverHost.getInstance(conf);
-  }
 }
diff --git a/hbase-mapreduce/pom.xml b/hbase-mapreduce/pom.xml
index 5bd03f4..789207a 100644
--- a/hbase-mapreduce/pom.xml
+++ b/hbase-mapreduce/pom.xml
@@ -144,8 +144,8 @@
       <artifactId>slf4j-api</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
     </dependency>
     <dependency>
       <groupId>org.apache.hbase</groupId>
diff --git 
a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
 
b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
index bea879a..8f3e45b 100644
--- 
a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
+++ 
b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
@@ -20,6 +20,8 @@ package org.apache.hadoop.hbase;
 
 import com.codahale.metrics.Histogram;
 import com.codahale.metrics.UniformReservoir;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.lang.reflect.Constructor;
@@ -87,8 +89,6 @@ import org.apache.hadoop.hbase.io.hfile.RandomDistribution;
 import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;
 import org.apache.hadoop.hbase.regionserver.BloomType;
 import org.apache.hadoop.hbase.regionserver.CompactingMemStore;
-import org.apache.hadoop.hbase.trace.HBaseHTraceConfiguration;
-import org.apache.hadoop.hbase.trace.SpanReceiverHost;
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.ByteArrayHashKey;
 import org.apache.hadoop.hbase.util.Bytes;
@@ -106,9 +106,6 @@ import 
org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
 import org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer;
 import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
-import org.apache.htrace.core.ProbabilitySampler;
-import org.apache.htrace.core.Sampler;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -706,6 +703,10 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
     int totalRows = DEFAULT_ROWS_PER_GB;
     int measureAfter = 0;
     float sampleRate = 1.0f;
+    /**
+     * @deprecated Useless after switching to OpenTelemetry
+     */
+    @Deprecated
     double traceRate = 0.0;
     String tableName = TABLE_NAME;
     boolean flushCommits = true;
@@ -1156,8 +1157,6 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
     protected final TestOptions opts;
 
     private final Status status;
-    private final Sampler traceSampler;
-    private final SpanReceiverHost receiverHost;
 
     private String testName;
     private Histogram latencyHistogram;
@@ -1179,18 +1178,9 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
      */
     TestBase(final Configuration conf, final TestOptions options, final Status 
status) {
       this.conf = conf;
-      this.receiverHost = this.conf == null? null: 
SpanReceiverHost.getInstance(conf);
       this.opts = options;
       this.status = status;
       this.testName = this.getClass().getSimpleName();
-      if (options.traceRate >= 1.0) {
-        this.traceSampler = Sampler.ALWAYS;
-      } else if (options.traceRate > 0.0) {
-        conf.setDouble("hbase.sampler.fraction", options.traceRate);
-        this.traceSampler = new ProbabilitySampler(new 
HBaseHTraceConfiguration(conf));
-      } else {
-        this.traceSampler = Sampler.NEVER;
-      }
       everyN = (int) (opts.totalRows / (opts.totalRows * opts.sampleRate));
       if (options.isValueZipf()) {
         this.zipf = new RandomDistribution.Zipf(this.rand, 1, 
options.getValueSize(), 1.2);
@@ -1360,7 +1350,6 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
               
YammerHistogramUtils.getHistogramReport(bytesInRemoteResultsHistogram));
         }
       }
-      receiverHost.closeReceivers();
     }
 
     abstract void onTakedown() throws IOException;
@@ -1397,7 +1386,6 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
     void testTimed() throws IOException, InterruptedException {
       int startRow = getStartRow();
       int lastRow = getLastRow();
-      TraceUtil.addSampler(traceSampler);
       // Report on completion of 1/10th of total.
       for (int ii = 0; ii < opts.cycles; ii++) {
         if (opts.cycles > 1) LOG.info("Cycle=" + ii + " of " + opts.cycles);
@@ -1405,8 +1393,11 @@ public class PerformanceEvaluation extends Configured 
implements Tool {
           if (i % everyN != 0) continue;
           long startTime = System.nanoTime();
           boolean requestSent = false;
-          try (TraceScope scope = TraceUtil.createTrace("test row");){
+          Span span = TraceUtil.getGlobalTracer().spanBuilder("test 
row").startSpan();
+          try (Scope scope = span.makeCurrent()){
             requestSent = testRow(i, startTime);
+          } finally {
+            span.end();
           }
           if ( (i - startRow) > opts.measureAfter) {
             // If multiget or multiput is enabled, say set to 10, testRow() 
returns immediately
diff --git a/hbase-protocol-shaded/pom.xml b/hbase-protocol-shaded/pom.xml
index 6d8b0ab..32619da 100644
--- a/hbase-protocol-shaded/pom.xml
+++ b/hbase-protocol-shaded/pom.xml
@@ -201,10 +201,6 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
-    </dependency>
   </dependencies>
   <profiles>
     <!-- Skip the tests in this module -->
diff --git a/hbase-server/pom.xml b/hbase-server/pom.xml
index 04df64e..c06862c 100644
--- a/hbase-server/pom.xml
+++ b/hbase-server/pom.xml
@@ -409,8 +409,8 @@
     </dependency>
     <!-- tracing Dependencies -->
     <dependency>
-      <groupId>org.apache.htrace</groupId>
-      <artifactId>htrace-core4</artifactId>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
     </dependency>
     <dependency>
       <groupId>com.lmax</groupId>
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
index df84e00..17054a5 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
@@ -18,14 +18,14 @@
  */
 package org.apache.hadoop.hbase.executor;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Context;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.util.concurrent.atomic.AtomicLong;
 
 import org.apache.hadoop.hbase.Server;
 import org.apache.hadoop.hbase.trace.TraceUtil;
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.TraceScope;
-import org.apache.htrace.core.Tracer;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -75,7 +75,7 @@ public abstract class EventHandler implements Runnable, 
Comparable<EventHandler>
    * Default base class constructor.
    */
   public EventHandler(Server server, EventType eventType) {
-    this.parent = Tracer.getCurrentSpan();
+    this.parent = Span.current();
     this.server = server;
     this.eventType = eventType;
     seqid = seqids.incrementAndGet();
@@ -100,10 +100,14 @@ public abstract class EventHandler implements Runnable, 
Comparable<EventHandler>
 
   @Override
   public void run() {
-    try (TraceScope scope = 
TraceUtil.createTrace(this.getClass().getSimpleName(), parent)) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder(getClass().getSimpleName())
+      .setParent(Context.current().with(parent)).startSpan();
+    try (Scope scope = span.makeCurrent()) {
       process();
-    } catch(Throwable t) {
+    } catch (Throwable t) {
       handleException(t);
+    } finally {
+      span.end();
     }
   }
 
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
index 1ed1bb5..0b8d630 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
@@ -17,6 +17,8 @@
  */
 package org.apache.hadoop.hbase.io.hfile;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.DataInput;
 import java.io.IOException;
 import java.nio.ByteBuffer;
@@ -48,7 +50,6 @@ import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.IdLock;
 import org.apache.hadoop.hbase.util.ObjectIntPair;
 import org.apache.hadoop.io.WritableUtils;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -1288,7 +1289,8 @@ public abstract class HFileReaderImpl implements 
HFile.Reader, Configurable {
 
     boolean useLock = false;
     IdLock.Entry lockEntry = null;
-    try (TraceScope traceScope = 
TraceUtil.createTrace("HFileReaderImpl.readBlock")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("HFileReaderImpl.readBlock").startSpan();
+    try (Scope traceScope = span.makeCurrent()) {
       while (true) {
         // Check cache for block. If found return.
         if (cacheConf.shouldReadBlockFromCache(expectedBlockType)) {
@@ -1303,7 +1305,7 @@ public abstract class HFileReaderImpl implements 
HFile.Reader, Configurable {
             if (LOG.isTraceEnabled()) {
               LOG.trace("From Cache " + cachedBlock);
             }
-            TraceUtil.addTimelineAnnotation("blockCacheHit");
+            span.addEvent("blockCacheHit");
             assert cachedBlock.isUnpacked() : "Packed block leak.";
             if (cachedBlock.getBlockType().isData()) {
               if (updateCacheMetrics) {
@@ -1333,7 +1335,7 @@ public abstract class HFileReaderImpl implements 
HFile.Reader, Configurable {
           // Carry on, please load.
         }
 
-        TraceUtil.addTimelineAnnotation("blockCacheMiss");
+        span.addEvent("blockCacheMiss");
         // Load block from filesystem.
         HFileBlock hfileBlock = fsBlockReader.readBlockData(dataBlockOffset, 
onDiskBlockSize, pread,
           !isCompaction, shouldUseHeap(expectedBlockType));
@@ -1363,6 +1365,7 @@ public abstract class HFileReaderImpl implements 
HFile.Reader, Configurable {
       if (lockEntry != null) {
         offsetLock.releaseLockEntry(lockEntry);
       }
+      span.end();
     }
   }
 
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/CallRunner.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/CallRunner.java
index 48ee664..ce593e2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/CallRunner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/CallRunner.java
@@ -17,23 +17,24 @@
  */
 package org.apache.hadoop.hbase.ipc;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.net.InetSocketAddress;
 import java.nio.channels.ClosedChannelException;
 import java.util.Optional;
-
 import org.apache.hadoop.hbase.CallDroppedException;
 import org.apache.hadoop.hbase.CellScanner;
 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
-import org.apache.hadoop.hbase.trace.TraceUtil;
-import org.apache.yetus.audience.InterfaceAudience;
-import org.apache.yetus.audience.InterfaceStability;
 import org.apache.hadoop.hbase.exceptions.TimeoutIOException;
 import org.apache.hadoop.hbase.monitoring.MonitoredRPCHandler;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hbase.thirdparty.com.google.protobuf.Message;
+import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.util.StringUtils;
-import org.apache.htrace.core.TraceScope;
+import org.apache.yetus.audience.InterfaceAudience;
+import org.apache.yetus.audience.InterfaceStability;
+
+import org.apache.hbase.thirdparty.com.google.protobuf.Message;
 
 /**
  * The request processing logic, which is usually executed in thread pools 
provided by an
@@ -93,6 +94,14 @@ public class CallRunner {
     this.rpcServer = null;
   }
 
+  private String getServiceName() {
+    return call.getService() != null ? 
call.getService().getDescriptorForType().getName() : "";
+  }
+
+  private String getMethodName() {
+    return call.getMethod() != null ? call.getMethod().getName() : "";
+  }
+
   public void run() {
     try {
       if (call.disconnectSince() >= 0) {
@@ -117,18 +126,16 @@ public class CallRunner {
       String error = null;
       Pair<Message, CellScanner> resultPair = null;
       RpcServer.CurCall.set(call);
-      TraceScope traceScope = null;
-      try {
+      String serviceName = getServiceName();
+      String methodName = getMethodName();
+      String traceString = serviceName + "." + methodName;
+      Span span = 
TraceUtil.getGlobalTracer().spanBuilder(traceString).startSpan();
+      try (Scope traceScope = span.makeCurrent()) {
         if (!this.rpcServer.isStarted()) {
           InetSocketAddress address = rpcServer.getListenerAddress();
           throw new ServerNotRunningYetException("Server " +
               (address != null ? address : "(channel closed)") + " is not 
running yet");
         }
-        String serviceName =
-            call.getService() != null ? 
call.getService().getDescriptorForType().getName() : "";
-        String methodName = (call.getMethod() != null) ? 
call.getMethod().getName() : "";
-        String traceString = serviceName + "." + methodName;
-        traceScope = TraceUtil.createTrace(traceString);
         // make the call
         resultPair = this.rpcServer.call(call, this.status);
       } catch (TimeoutIOException e){
@@ -150,14 +157,12 @@ public class CallRunner {
           throw (Error)e;
         }
       } finally {
-        if (traceScope != null) {
-          traceScope.close();
-        }
         RpcServer.CurCall.set(null);
         if (resultPair != null) {
           this.rpcServer.addCallSize(call.getSize() * -1);
           sucessful = true;
         }
+        span.end();
       }
       // return back the RPC request read BB we can do here. It is done by now.
       call.cleanup();
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
index a61254f..1bbc4db 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
@@ -191,7 +191,6 @@ import org.apache.hadoop.hbase.rsgroup.RSGroupUtil;
 import org.apache.hadoop.hbase.security.AccessDeniedException;
 import org.apache.hadoop.hbase.security.SecurityConstants;
 import org.apache.hadoop.hbase.security.UserProvider;
-import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Addressing;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.FutureUtils;
@@ -420,7 +419,6 @@ public class HMaster extends HRegionServer implements 
MasterServices {
    */
   public HMaster(final Configuration conf) throws IOException {
     super(conf);
-    TraceUtil.initTracer(conf);
     try {
       if (conf.getBoolean(MAINTENANCE_MODE, false)) {
         LOG.info("Detected {}=true via configuration.", MAINTENANCE_MODE);
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMasterCommandLine.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMasterCommandLine.java
index d2464a6..778adbe 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMasterCommandLine.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMasterCommandLine.java
@@ -21,15 +21,12 @@ package org.apache.hadoop.hbase.master;
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.LocalHBaseCluster;
 import org.apache.hadoop.hbase.MasterNotRunningException;
 import org.apache.hadoop.hbase.ZNodeClearer;
 import org.apache.hadoop.hbase.ZooKeeperConnectionException;
-import org.apache.hadoop.hbase.trace.TraceUtil;
-import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
@@ -39,6 +36,7 @@ import org.apache.hadoop.hbase.util.ServerCommandLine;
 import org.apache.hadoop.hbase.zookeeper.MiniZooKeeperCluster;
 import org.apache.hadoop.hbase.zookeeper.ZKUtil;
 import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
+import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.zookeeper.KeeperException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -167,8 +165,6 @@ public class HMasterCommandLine extends ServerCommandLine {
 
   private int startMaster() {
     Configuration conf = getConf();
-    TraceUtil.initTracer(conf);
-
     try {
       // If 'local', defer to LocalHBaseCluster instance.  Starts master
       // and regionserver both in the one JVM.
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
index 493b74b..f69e3f3 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
@@ -22,6 +22,8 @@ import static 
org.apache.hadoop.hbase.regionserver.HStoreFile.MAJOR_COMPACTION_K
 import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;
 
 import edu.umd.cs.findbugs.annotations.Nullable;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.EOFException;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -184,7 +186,6 @@ import org.apache.hadoop.hbase.wal.WALKeyImpl;
 import org.apache.hadoop.hbase.wal.WALSplitUtil;
 import org.apache.hadoop.hbase.wal.WALSplitUtil.MutationReplay;
 import org.apache.hadoop.util.StringUtils;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -6624,8 +6625,9 @@ public class HRegion implements HeapSize, 
PropagatingConfigurationObserver, Regi
     RowLockImpl result = null;
 
     boolean success = false;
-    try (TraceScope scope = TraceUtil.createTrace("HRegion.getRowLock")) {
-      TraceUtil.addTimelineAnnotation("Getting a " + 
(readLock?"readLock":"writeLock"));
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("HRegion.getRowLock").startSpan();
+    try (Scope scope = span.makeCurrent()) {
+      span.addEvent("Getting a " + (readLock ? "readLock" : "writeLock"));
       // Keep trying until we have a lock or error out.
       // TODO: do we need to add a time component here?
       while (result == null) {
@@ -6662,7 +6664,7 @@ public class HRegion implements HeapSize, 
PropagatingConfigurationObserver, Regi
       }
 
       if (timeout <= 0 || !result.getLock().tryLock(timeout, 
TimeUnit.MILLISECONDS)) {
-        TraceUtil.addTimelineAnnotation("Failed to get row lock");
+        span.addEvent("Failed to get row lock");
         String message = "Timed out waiting for lock for row: " + rowKey + " 
in region "
             + getRegionInfo().getEncodedName();
         if (reachDeadlineFirst) {
@@ -6680,7 +6682,7 @@ public class HRegion implements HeapSize, 
PropagatingConfigurationObserver, Regi
         LOG.debug("Thread interrupted waiting for lock on row: {}, in region 
{}", rowKey,
           getRegionInfo().getRegionNameAsString());
       }
-      TraceUtil.addTimelineAnnotation("Interrupted exception getting row 
lock");
+      span.addEvent("Interrupted exception getting row lock");
       throw throwOnInterrupt(ie);
     } catch (Error error) {
       // The maximum lock count for read lock is 64K (hardcoded), when this 
maximum count
@@ -6689,13 +6691,14 @@ public class HRegion implements HeapSize, 
PropagatingConfigurationObserver, Regi
       LOG.warn("Error to get row lock for {}, in region {}, cause: {}", 
Bytes.toStringBinary(row),
         getRegionInfo().getRegionNameAsString(), error);
       IOException ioe = new IOException(error);
-      TraceUtil.addTimelineAnnotation("Error getting row lock");
+      span.addEvent("Error getting row lock");
       throw ioe;
     } finally {
       // Clean up the counts just in case this was the thing keeping the 
context alive.
       if (!success && rowLockContext != null) {
         rowLockContext.cleanUp();
       }
+      span.end();
     }
   }
 
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
index bcb1436..47e618b 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
@@ -153,8 +153,6 @@ import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.security.access.AccessChecker;
 import org.apache.hadoop.hbase.security.access.ZKPermissionWatcher;
-import org.apache.hadoop.hbase.trace.SpanReceiverHost;
-import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Addressing;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.CommonFSUtils;
@@ -391,7 +389,6 @@ public class HRegionServer extends Thread implements
 
   private MetricsRegionServer metricsRegionServer;
   MetricsRegionServerWrapperImpl metricsRegionServerImpl;
-  private SpanReceiverHost spanReceiverHost;
 
   /**
    * ChoreService used to schedule tasks that we want to run periodically
@@ -589,7 +586,6 @@ public class HRegionServer extends Thread implements
    */
   public HRegionServer(final Configuration conf) throws IOException {
     super("RegionServer");  // thread name
-    TraceUtil.initTracer(conf);
     try {
       this.startcode = System.currentTimeMillis();
       this.conf = conf;
@@ -655,7 +651,6 @@ public class HRegionServer extends Thread implements
         (t, e) -> abort("Uncaught exception in executorService thread " + 
t.getName(), e);
 
       initializeFileSystem();
-      spanReceiverHost = SpanReceiverHost.getInstance(getConfiguration());
 
       this.configurationManager = new ConfigurationManager();
       setupWindows(getConfiguration(), getConfigurationManager());
@@ -2664,10 +2659,6 @@ public class HRegionServer extends Thread implements
     if (this.cacheFlusher != null) {
       this.cacheFlusher.join();
     }
-
-    if (this.spanReceiverHost != null) {
-      this.spanReceiverHost.closeReceivers();
-    }
     if (this.walRoller != null) {
       this.walRoller.close();
     }
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServerCommandLine.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServerCommandLine.java
index afd85f8..5fd1233 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServerCommandLine.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServerCommandLine.java
@@ -18,14 +18,13 @@
  */
 package org.apache.hadoop.hbase.regionserver;
 
-import org.apache.hadoop.hbase.trace.TraceUtil;
-import org.apache.yetus.audience.InterfaceAudience;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.LocalHBaseCluster;
 import org.apache.hadoop.hbase.util.ServerCommandLine;
+import org.apache.yetus.audience.InterfaceAudience;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Class responsible for parsing the command line and starting the
@@ -51,7 +50,6 @@ public class HRegionServerCommandLine extends 
ServerCommandLine {
 
   private int start() throws Exception {
     Configuration conf = getConf();
-    TraceUtil.initTracer(conf);
     try {
       // If 'local', don't start a region server here. Defer to
       // LocalHBaseCluster. It manages 'local' clusters.
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
index 0a5ec91..a4cb83e 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
@@ -18,6 +18,8 @@
  */
 package org.apache.hadoop.hbase.regionserver;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.lang.Thread.UncaughtExceptionHandler;
 import java.util.ArrayList;
@@ -37,7 +39,6 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.LongAdder;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.DroppedSnapshotException;
 import org.apache.hadoop.hbase.HConstants;
@@ -50,12 +51,12 @@ import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;
 import org.apache.hadoop.hbase.util.Threads;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.util.StringUtils.TraditionalBinaryPrefix;
-import 
org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import 
org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
+
 /**
  * Thread that flushes cache on request
  *
@@ -703,10 +704,12 @@ class MemStoreFlusher implements FlushRequester {
    * amount of memstore consumption.
    */
   public void reclaimMemStoreMemory() {
-    try (TraceScope scope = 
TraceUtil.createTrace("MemStoreFluser.reclaimMemStoreMemory")) {
+    Span span =
+      
TraceUtil.getGlobalTracer().spanBuilder("MemStoreFluser.reclaimMemStoreMemory").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       FlushType flushType = isAboveHighWaterMark();
       if (flushType != FlushType.NORMAL) {
-        TraceUtil.addTimelineAnnotation("Force Flush. We're above high water 
mark.");
+        span.addEvent("Force Flush. We're above high water mark.");
         long start = EnvironmentEdgeManager.currentTime();
         long nextLogTimeMs = start;
         synchronized (this.blockSignal) {
@@ -775,6 +778,7 @@ class MemStoreFlusher implements FlushRequester {
         if (flushType != FlushType.NORMAL) {
           wakeupFlushThread();
         }
+        span.end();
       }
     }
   }
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
index af5bfd5..c694b7f 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
@@ -25,6 +25,8 @@ import static 
org.apache.hbase.thirdparty.com.google.common.base.Preconditions.c
 import static 
org.apache.hbase.thirdparty.com.google.common.base.Preconditions.checkNotNull;
 
 import com.lmax.disruptor.RingBuffer;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InterruptedIOException;
@@ -82,7 +84,6 @@ import org.apache.hadoop.hbase.wal.WALProvider.WriterBase;
 import org.apache.hadoop.hbase.wal.WALSplitter;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.util.StringUtils;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -831,9 +832,12 @@ public abstract class AbstractFSWAL<W extends WriterBase> 
implements WAL {
    * @throws IOException if there is a problem flushing or closing the 
underlying FS
    */
   Path replaceWriter(Path oldPath, Path newPath, W nextWriter) throws 
IOException {
-    try (TraceScope scope = TraceUtil.createTrace("FSHFile.replaceWriter")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("FSHFile.replaceWriter").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       doReplaceWriter(oldPath, newPath, nextWriter);
       return newPath;
+    } finally {
+      span.end();
     }
   }
 
@@ -884,7 +888,8 @@ public abstract class AbstractFSWAL<W extends WriterBase> 
implements WAL {
         return null;
       }
       Map<byte[], List<byte[]>> regionsToFlush = null;
-      try (TraceScope scope = TraceUtil.createTrace("FSHLog.rollWriter")) {
+      Span span = 
TraceUtil.getGlobalTracer().spanBuilder("FSHLog.rollWriter").startSpan();
+      try (Scope scope = span.makeCurrent()) {
         Path oldPath = getOldPath();
         Path newPath = getNewPath();
         // Any exception from here on is catastrophic, non-recoverable so we 
currently abort.
@@ -911,6 +916,8 @@ public abstract class AbstractFSWAL<W extends WriterBase> 
implements WAL {
         throw new IOException(
             "Underlying FileSystem can't meet stream requirements. See RS log 
" + "for details.",
             exception);
+      } finally {
+        span.end();
       }
       return regionsToFlush;
     } finally {
@@ -1092,7 +1099,7 @@ public abstract class AbstractFSWAL<W extends WriterBase> 
implements WAL {
           .append(TimeUnit.NANOSECONDS.toMillis(timeInNanos))
           .append(" ms, current pipeline: ")
           .append(Arrays.toString(getPipeline())).toString();
-      TraceUtil.addTimelineAnnotation(msg);
+      Span.current().addEvent(msg);
       LOG.info(msg);
       if (timeInNanos > this.rollOnSyncNs) {
         // A single sync took too long.
@@ -1128,12 +1135,14 @@ public abstract class AbstractFSWAL<W extends 
WriterBase> implements WAL {
     long txid = txidHolder.longValue();
     ServerCall<?> rpcCall = RpcServer.getCurrentCall().filter(c -> c 
instanceof ServerCall)
       .filter(c -> c.getCellScanner() != null).map(c -> (ServerCall) 
c).orElse(null);
-    try (TraceScope scope = TraceUtil.createTrace(implClassName + ".append")) {
+    Span span = TraceUtil.getGlobalTracer().spanBuilder(implClassName + 
".append").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       FSWALEntry entry = new FSWALEntry(txid, key, edits, hri, inMemstore, 
rpcCall);
       entry.stampRegionSequenceId(we);
       ringBuffer.get(txid).load(entry);
     } finally {
       ringBuffer.publish(txid);
+      span.end();
     }
     return txid;
   }
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java
index 3424460..655f782 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java
@@ -24,6 +24,8 @@ import static 
org.apache.hadoop.hbase.util.FutureUtils.addListener;
 import com.lmax.disruptor.RingBuffer;
 import com.lmax.disruptor.Sequence;
 import com.lmax.disruptor.Sequencer;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.lang.reflect.Field;
 import java.util.ArrayDeque;
@@ -44,7 +46,6 @@ import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Supplier;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -58,10 +59,10 @@ import org.apache.hadoop.hbase.wal.WALEdit;
 import org.apache.hadoop.hbase.wal.WALKeyImpl;
 import org.apache.hadoop.hbase.wal.WALProvider.AsyncWriter;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
 import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
 import 
org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
 import org.apache.hbase.thirdparty.io.netty.channel.Channel;
@@ -394,7 +395,7 @@ public class AsyncFSWAL extends AbstractFSWAL<AsyncWriter> {
   }
 
   private void addTimeAnnotation(SyncFuture future, String annotation) {
-    TraceUtil.addTimelineAnnotation(annotation);
+    Span.current().addEvent(annotation);
     // TODO handle htrace API change, see HBASE-18895
     // future.setSpan(scope.getSpan());
   }
@@ -671,7 +672,8 @@ public class AsyncFSWAL extends AbstractFSWAL<AsyncWriter> {
 
   @Override
   public void sync(boolean forceSync) throws IOException {
-    try (TraceScope scope = TraceUtil.createTrace("AsyncFSWAL.sync")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("AsyncFSWAL.sync").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       long txid = waitingConsumePayloads.next();
       SyncFuture future;
       try {
@@ -685,6 +687,8 @@ public class AsyncFSWAL extends AbstractFSWAL<AsyncWriter> {
         consumeExecutor.execute(consumer);
       }
       blockOnSync(future);
+    } finally {
+      span.end();
     }
   }
 
@@ -693,7 +697,8 @@ public class AsyncFSWAL extends AbstractFSWAL<AsyncWriter> {
     if (highestSyncedTxid.get() >= txid) {
       return;
     }
-    try (TraceScope scope = TraceUtil.createTrace("AsyncFSWAL.sync")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("AsyncFSWAL.sync").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       // here we do not use ring buffer sequence as txid
       long sequence = waitingConsumePayloads.next();
       SyncFuture future;
@@ -708,6 +713,8 @@ public class AsyncFSWAL extends AbstractFSWAL<AsyncWriter> {
         consumeExecutor.execute(consumer);
       }
       blockOnSync(future);
+    } finally {
+      span.end();
     }
   }
 
diff --git 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
index e2320db..3fd0959 100644
--- 
a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
+++ 
b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
@@ -29,6 +29,8 @@ import com.lmax.disruptor.LifecycleAware;
 import com.lmax.disruptor.TimeoutException;
 import com.lmax.disruptor.dsl.Disruptor;
 import com.lmax.disruptor.dsl.ProducerType;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.Arrays;
@@ -59,7 +61,6 @@ import org.apache.hadoop.hbase.wal.WALProvider.Writer;
 import org.apache.hadoop.hdfs.DFSOutputStream;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -364,7 +365,7 @@ public class FSHLog extends AbstractFSWAL<Writer> {
           // use assert to make sure no change breaks the logic that
           // sequence and zigzagLatch will be set together
           assert sequence > 0L : "Failed to get sequence from ring buffer";
-          TraceUtil.addTimelineAnnotation("awaiting safepoint");
+          Span.current().addEvent("awaiting safepoint");
           syncFuture = 
zigzagLatch.waitSafePoint(publishSyncOnRingBuffer(sequence, false));
         }
       } catch (FailedSyncBeforeLogCloseException e) {
@@ -435,10 +436,11 @@ public class FSHLog extends AbstractFSWAL<Writer> {
   }
 
   private void closeWriter(Writer writer, Path path, boolean syncCloseCall) 
throws IOException {
+    Span span = Span.current();
     try {
-      TraceUtil.addTimelineAnnotation("closing writer");
+      span.addEvent("closing writer");
       writer.close();
-      TraceUtil.addTimelineAnnotation("writer closed");
+      span.addEvent("writer closed");
     } catch (IOException ioe) {
       int errors = closeErrorCount.incrementAndGet();
       boolean hasUnflushedEntries = isUnflushedEntries();
@@ -646,10 +648,10 @@ public class FSHLog extends AbstractFSWAL<Writer> {
           long start = System.nanoTime();
           Throwable lastException = null;
           try {
-            TraceUtil.addTimelineAnnotation("syncing writer");
+            Span.current().addEvent("syncing writer");
             long unSyncedFlushSeq = highestUnsyncedTxid;
             writer.sync(sf.isForceSync());
-            TraceUtil.addTimelineAnnotation("writer synced");
+            Span.current().addEvent("writer synced");
             if (unSyncedFlushSeq > currentSequence) {
               currentSequence = unSyncedFlushSeq;
             }
@@ -792,7 +794,7 @@ public class FSHLog extends AbstractFSWAL<Writer> {
   }
 
   // Sync all known transactions
-  private void publishSyncThenBlockOnCompletion(TraceScope scope, boolean 
forceSync) throws IOException {
+  private void publishSyncThenBlockOnCompletion(Scope scope, boolean 
forceSync) throws IOException {
     SyncFuture syncFuture = publishSyncOnRingBuffer(forceSync);
     blockOnSync(syncFuture);
   }
@@ -824,7 +826,8 @@ public class FSHLog extends AbstractFSWAL<Writer> {
 
   @Override
   public void sync(boolean forceSync) throws IOException {
-    try (TraceScope scope = TraceUtil.createTrace("FSHLog.sync")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("FSHLog.sync").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       publishSyncThenBlockOnCompletion(scope, forceSync);
     }
   }
@@ -840,7 +843,8 @@ public class FSHLog extends AbstractFSWAL<Writer> {
       // Already sync'd.
       return;
     }
-    try (TraceScope scope = TraceUtil.createTrace("FSHLog.sync")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("FSHLog.sync").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       publishSyncThenBlockOnCompletion(scope, forceSync);
     }
   }
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
index 29e8883..5f91526 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
@@ -118,7 +118,6 @@ import org.apache.hadoop.hbase.security.HBaseKerberosUtils;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.security.visibility.VisibilityLabelsCache;
-import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.CommonFSUtils;
 import org.apache.hadoop.hbase.util.FSUtils;
@@ -604,8 +603,6 @@ public class HBaseTestingUtility extends 
HBaseZKTestingUtility {
     
Log4jUtils.setLogLevel(org.apache.hadoop.metrics2.impl.MetricsSystemImpl.class.getName(),
       "ERROR");
 
-    TraceUtil.initTracer(conf);
-
     this.dfsCluster = new MiniDFSCluster(0, this.conf, servers, true, true,
         true, null, racks, hosts, null);
 
@@ -1113,7 +1110,6 @@ public class HBaseTestingUtility extends 
HBaseZKTestingUtility {
     
Log4jUtils.setLogLevel(org.apache.hadoop.hbase.ScheduledChore.class.getName(), 
"INFO");
 
     Configuration c = new Configuration(this.conf);
-    TraceUtil.initTracer(c);
     this.hbaseCluster = new MiniHBaseCluster(c, option.getNumMasters(),
       option.getNumAlwaysStandByMasters(), option.getNumRegionServers(), 
option.getRsPorts(),
       option.getMasterClass(), option.getRsClass());
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestExecutorStatusChore.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestExecutorStatusChore.java
index ce3e8ff..2b1ac98 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestExecutorStatusChore.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestExecutorStatusChore.java
@@ -21,6 +21,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
+
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import org.apache.hadoop.hbase.executor.EventType;
@@ -51,7 +52,7 @@ public class TestExecutorStatusChore {
   public void testMetricsCollect() throws Exception {
     int maxThreads = 5;
     int maxTries = 10;
-    int sleepInterval = 10;
+    int sleepInterval = 1000;
 
     Server mockedServer = mock(Server.class);
     
when(mockedServer.getConfiguration()).thenReturn(HBaseConfiguration.create());
@@ -70,10 +71,9 @@ public class TestExecutorStatusChore {
 
     AtomicBoolean lock = new AtomicBoolean(true);
     AtomicInteger counter = new AtomicInteger(0);
-
     for (int i = 0; i < maxThreads + 1; i++) {
-      executorService.submit(new TestEventHandler(mockedServer,
-          EventType.RS_PARALLEL_SEEK, lock, counter));
+      executorService
+        .submit(new TestEventHandler(mockedServer, EventType.RS_PARALLEL_SEEK, 
lock, counter));
     }
 
     // The TestEventHandler will increment counter when it starts.
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/executor/TestExecutorService.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/executor/TestExecutorService.java
index c93e951..b0ca702 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/executor/TestExecutorService.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/executor/TestExecutorService.java
@@ -164,8 +164,8 @@ public class TestExecutorService {
     private final AtomicBoolean lock;
     private AtomicInteger counter;
 
-    public TestEventHandler(Server server, EventType eventType,
-                            AtomicBoolean lock, AtomicInteger counter) {
+    public TestEventHandler(Server server, EventType eventType, AtomicBoolean 
lock,
+      AtomicInteger counter) {
       super(server, eventType);
       this.lock = lock;
       this.counter = counter;
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TestHTraceHooks.java 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TestHTraceHooks.java
deleted file mode 100644
index b1fc5b9..0000000
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TestHTraceHooks.java
+++ /dev/null
@@ -1,134 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.hbase.trace;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-import java.util.Collection;
-import java.util.LinkedList;
-import java.util.List;
-import org.apache.hadoop.hbase.HBaseClassTestRule;
-import org.apache.hadoop.hbase.HBaseTestingUtility;
-import org.apache.hadoop.hbase.StartMiniClusterOption;
-import org.apache.hadoop.hbase.TableName;
-import org.apache.hadoop.hbase.Waiter;
-import org.apache.hadoop.hbase.client.Put;
-import org.apache.hadoop.hbase.client.Table;
-import org.apache.hadoop.hbase.testclassification.MediumTests;
-import org.apache.hadoop.hbase.testclassification.MiscTests;
-import org.apache.htrace.core.POJOSpanReceiver;
-import org.apache.htrace.core.Sampler;
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.TraceScope;
-import org.junit.AfterClass;
-import org.junit.BeforeClass;
-import org.junit.ClassRule;
-import org.junit.Ignore;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.experimental.categories.Category;
-import org.junit.rules.TestName;
-
-import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
-
-@Ignore // We don't support htrace in hbase-2.0.0 and this flakey is a little 
flakey.
-@Category({MiscTests.class, MediumTests.class})
-public class TestHTraceHooks {
-
-  @ClassRule
-  public static final HBaseClassTestRule CLASS_RULE =
-      HBaseClassTestRule.forClass(TestHTraceHooks.class);
-
-  private static final byte[] FAMILY_BYTES = "family".getBytes();
-  private static final HBaseTestingUtility TEST_UTIL = new 
HBaseTestingUtility();
-  private static POJOSpanReceiver rcvr;
-
-  @Rule
-  public TestName name = new TestName();
-
-  @BeforeClass
-  public static void before() throws Exception {
-    StartMiniClusterOption option = StartMiniClusterOption.builder()
-        .numMasters(2).numRegionServers(3).numDataNodes(3).build();
-    TEST_UTIL.startMiniCluster(option);
-    rcvr = new POJOSpanReceiver(new 
HBaseHTraceConfiguration(TEST_UTIL.getConfiguration()));
-    TraceUtil.addReceiver(rcvr);
-    TraceUtil.addSampler(new Sampler() {
-      @Override
-      public boolean next() {
-        return true;
-      }
-    });
-  }
-
-  @AfterClass
-  public static void after() throws Exception {
-    TEST_UTIL.shutdownMiniCluster();
-    TraceUtil.removeReceiver(rcvr);
-    rcvr = null;
-  }
-
-  @Test
-  public void testTraceCreateTable() throws Exception {
-    Table table;
-    Span createTableSpan;
-    try (TraceScope scope = TraceUtil.createTrace("creating table")) {
-      createTableSpan = scope.getSpan();
-      table = TEST_UTIL.createTable(TableName.valueOf(name.getMethodName()), 
FAMILY_BYTES);
-    }
-
-    // Some table creation is async.  Need to make sure that everything is 
full in before
-    // checking to see if the spans are there.
-    TEST_UTIL.waitFor(10000, new Waiter.Predicate<Exception>() {
-      @Override public boolean evaluate() throws Exception {
-        return (rcvr == null) ? true : rcvr.getSpans().size() >= 5;
-      }
-    });
-
-    Collection<Span> spans = Sets.newHashSet(rcvr.getSpans());
-    List<Span> roots = new LinkedList<>();
-    TraceTree traceTree = new TraceTree(spans);
-    
roots.addAll(traceTree.getSpansByParent().find(createTableSpan.getSpanId()));
-
-    // Roots was made 3 in hbase2. It used to be 1. We changed it back to 1 on 
upgrade to
-    // htrace-4.2 just to get the test to pass (traces are not wholesome in 
hbase2; TODO).
-    assertEquals(1, roots.size());
-    assertEquals("creating table", createTableSpan.getDescription());
-
-    if (spans != null) {
-      assertTrue(spans.size() > 5);
-    }
-
-    Put put = new Put("row".getBytes());
-    put.addColumn(FAMILY_BYTES, "col".getBytes(), "value".getBytes());
-
-    Span putSpan;
-
-    try (TraceScope scope = TraceUtil.createTrace("doing put")) {
-      putSpan = scope.getSpan();
-      table.put(put);
-    }
-
-    spans = rcvr.getSpans();
-    traceTree = new TraceTree(spans);
-    roots.clear();
-    roots.addAll(traceTree.getSpansByParent().find(putSpan.getSpanId()));
-    assertEquals(1, roots.size());
-  }
-}
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TraceTree.java 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TraceTree.java
deleted file mode 100644
index eb209d0..0000000
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/trace/TraceTree.java
+++ /dev/null
@@ -1,148 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.hbase.trace;
-
-import org.apache.htrace.core.Span;
-import org.apache.htrace.core.SpanId;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.TreeSet;
-
-/**
- * Used to create the graph formed by spans.
- */
-public class TraceTree {
-
-  public static class SpansByParent {
-    private static Comparator<Span> COMPARATOR =
-        new Comparator<Span>() {
-          @Override
-          public int compare(Span a, Span b) {
-            return a.getSpanId().compareTo(b.getSpanId());
-          }
-        };
-
-    private final TreeSet<Span> treeSet;
-
-    private final HashMap<SpanId, LinkedList<Span>> parentToSpans;
-
-    SpansByParent(Collection<Span> spans) {
-      TreeSet<Span> treeSet = new TreeSet<Span>(COMPARATOR);
-      parentToSpans = new HashMap<SpanId, LinkedList<Span>>();
-      for (Span span : spans) {
-        treeSet.add(span);
-        for (SpanId parent : span.getParents()) {
-          LinkedList<Span> list = parentToSpans.get(parent);
-          if (list == null) {
-            list = new LinkedList<Span>();
-            parentToSpans.put(parent, list);
-          }
-          list.add(span);
-        }
-        if (span.getParents().length == 0) {
-          LinkedList<Span> list = parentToSpans.get(SpanId.INVALID);
-          if (list == null) {
-            list = new LinkedList<Span>();
-            parentToSpans.put(SpanId.INVALID, list);
-          }
-          list.add(span);
-        }
-      }
-      this.treeSet = treeSet;
-    }
-
-    public List<Span> find(SpanId parentId) {
-      LinkedList<Span> spans = parentToSpans.get(parentId);
-      if (spans == null) {
-        return new LinkedList<Span>();
-      }
-      return spans;
-    }
-
-    public Iterator<Span> iterator() {
-      return Collections.unmodifiableSortedSet(treeSet).iterator();
-    }
-  }
-
-  public static class SpansByProcessId {
-    private static Comparator<Span> COMPARATOR =
-        new Comparator<Span>() {
-          @Override
-          public int compare(Span a, Span b) {
-            return a.getSpanId().compareTo(b.getSpanId());
-          }
-        };
-
-    private final TreeSet<Span> treeSet;
-
-    SpansByProcessId(Collection<Span> spans) {
-      TreeSet<Span> treeSet = new TreeSet<Span>(COMPARATOR);
-      for (Span span : spans) {
-        treeSet.add(span);
-      }
-      this.treeSet = treeSet;
-    }
-
-    public Iterator<Span> iterator() {
-      return Collections.unmodifiableSortedSet(treeSet).iterator();
-    }
-  }
-
-  private final SpansByParent spansByParent;
-  private final SpansByProcessId spansByProcessId;
-
-  /**
-   * Create a new TraceTree
-   *
-   * @param spans The collection of spans to use to create this TraceTree. 
Should
-   *              have at least one root span.
-   */
-  public TraceTree(Collection<Span> spans) {
-    if (spans == null) {
-      spans = Collections.emptySet();
-    }
-    this.spansByParent = new SpansByParent(spans);
-    this.spansByProcessId = new SpansByProcessId(spans);
-  }
-
-  public SpansByParent getSpansByParent() {
-    return spansByParent;
-  }
-
-  public SpansByProcessId getSpansByProcessId() {
-    return spansByProcessId;
-  }
-
-  @Override
-  public String toString() {
-    StringBuilder bld = new StringBuilder();
-    String prefix = "";
-    for (Iterator<Span> iter = spansByParent.iterator(); iter.hasNext();) {
-      Span span = iter.next();
-      bld.append(prefix).append(span.toString());
-      prefix = "\n";
-    }
-    return bld.toString();
-  }
-}
diff --git 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
index 602367c..94eef5e 100644
--- 
a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
+++ 
b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
@@ -25,6 +25,8 @@ import com.codahale.metrics.Histogram;
 import com.codahale.metrics.Meter;
 import com.codahale.metrics.MetricFilter;
 import com.codahale.metrics.MetricRegistry;
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -58,8 +60,6 @@ import 
org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;
 import org.apache.hadoop.hbase.regionserver.wal.SecureProtobufLogReader;
 import org.apache.hadoop.hbase.regionserver.wal.SecureProtobufLogWriter;
 import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;
-import org.apache.hadoop.hbase.trace.HBaseHTraceConfiguration;
-import org.apache.hadoop.hbase.trace.SpanReceiverHost;
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.CommonFSUtils;
@@ -67,10 +67,6 @@ import org.apache.hadoop.hbase.util.Threads;
 import org.apache.hadoop.hbase.wal.WALProvider.Writer;
 import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
-import org.apache.htrace.core.ProbabilitySampler;
-import org.apache.htrace.core.Sampler;
-import org.apache.htrace.core.TraceScope;
-import org.apache.htrace.core.Tracer;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -128,12 +124,10 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
     private final boolean noSync;
     private final HRegion region;
     private final int syncInterval;
-    private final Sampler loopSampler;
     private final NavigableMap<byte[], Integer> scopes;
 
     WALPutBenchmark(final HRegion region, final TableDescriptor htd,
-        final long numIterations, final boolean noSync, final int syncInterval,
-        final double traceFreq) {
+        final long numIterations, final boolean noSync, final int 
syncInterval) {
       this.numIterations = numIterations;
       this.noSync = noSync;
       this.syncInterval = syncInterval;
@@ -143,24 +137,6 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
       for(byte[] fam : htd.getColumnFamilyNames()) {
         scopes.put(fam, 0);
       }
-      String spanReceivers = getConf().get("hbase.trace.spanreceiver.classes");
-      if (spanReceivers == null || spanReceivers.isEmpty()) {
-        loopSampler = Sampler.NEVER;
-      } else {
-        if (traceFreq <= 0.0) {
-          LOG.warn("Tracing enabled but traceFreq=0.");
-          loopSampler = Sampler.NEVER;
-        } else if (traceFreq >= 1.0) {
-          loopSampler = Sampler.ALWAYS;
-          if (numIterations > 1000) {
-            LOG.warn("Full tracing of all iterations will produce a lot of 
data. Be sure your"
-              + " SpanReceiver can keep up.");
-          }
-        } else {
-          getConf().setDouble("hbase.sampler.fraction", traceFreq);
-          loopSampler = new ProbabilitySampler(new 
HBaseHTraceConfiguration(getConf()));
-        }
-      }
     }
 
     @Override
@@ -169,13 +145,14 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
       byte[] value = new byte[valueSize];
       Random rand = new Random(Thread.currentThread().getId());
       WAL wal = region.getWAL();
-
-      try (TraceScope threadScope = TraceUtil.createTrace("WALPerfEval." + 
Thread.currentThread().getName())) {
+      Span threadSpan = TraceUtil.getGlobalTracer()
+        .spanBuilder("WALPerfEval." + 
Thread.currentThread().getName()).startSpan();
+      try (Scope threadScope = threadSpan.makeCurrent()) {
         int lastSync = 0;
-        TraceUtil.addSampler(loopSampler);
         for (int i = 0; i < numIterations; ++i) {
-          assert Tracer.getCurrentSpan() == threadScope.getSpan() : "Span leak 
detected.";
-          try (TraceScope loopScope = TraceUtil.createTrace("runLoopIter" + 
i)) {
+          assert Span.current() == threadSpan : "Span leak detected.";
+          Span loopSpan = 
TraceUtil.getGlobalTracer().spanBuilder("runLoopIter" + i).startSpan();
+          try (Scope loopScope = loopSpan.makeCurrent()) {
             long now = System.nanoTime();
             Put put = setupPut(rand, key, value, numFamilies);
             WALEdit walEdit = new WALEdit();
@@ -191,10 +168,14 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
               }
             }
             latencyHistogram.update(System.nanoTime() - now);
+          } finally {
+            loopSpan.end();
           }
         }
       } catch (Exception e) {
         LOG.error(getClass().getSimpleName() + " Thread failed", e);
+      } finally {
+        threadSpan.end();
       }
     }
   }
@@ -215,9 +196,6 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
     boolean compress = false;
     String cipher = null;
     int numRegions = 1;
-    String spanReceivers = getConf().get("hbase.trace.spanreceiver.classes");
-    boolean trace = spanReceivers != null && !spanReceivers.isEmpty();
-    double traceFreq = 1.0;
     // Process command line args
     for (int i = 0; i < args.length; i++) {
       String cmd = args[i];
@@ -257,7 +235,8 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
         } else if (cmd.equals("-regions")) {
           numRegions = Integer.parseInt(args[++i]);
         } else if (cmd.equals("-traceFreq")) {
-          traceFreq = Double.parseDouble(args[++i]);
+          // keep it here for compatible
+          System.err.println("-traceFreq is not supported any more");
         } else if (cmd.equals("-h")) {
           printUsageAndExit();
         } else if (cmd.equals("--help")) {
@@ -306,13 +285,8 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
     CommonFSUtils.setFsDefault(getConf(), CommonFSUtils.getRootDir(getConf()));
     FileSystem fs = FileSystem.get(getConf());
     LOG.info("FileSystem={}, rootDir={}", fs, rootRegionDir);
-
-    SpanReceiverHost receiverHost = trace ? 
SpanReceiverHost.getInstance(getConf()) : null;
-    final Sampler sampler = trace ? Sampler.ALWAYS : Sampler.NEVER;
-    TraceUtil.addSampler(sampler);
-    TraceScope scope = TraceUtil.createTrace("WALPerfEval");
-
-    try {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("WALPerfEval").startSpan();
+    try (Scope scope = span.makeCurrent()){
       rootRegionDir = rootRegionDir.makeQualified(fs.getUri(), 
fs.getWorkingDirectory());
       cleanRegionRootDir(fs, rootRegionDir);
       CommonFSUtils.setRootDir(getConf(), rootRegionDir);
@@ -329,8 +303,8 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
           // a table per desired region means we can avoid carving up the key 
space
           final TableDescriptor htd = createHTableDescriptor(i, numFamilies);
           regions[i] = openRegion(fs, rootRegionDir, htd, wals, roll, roller);
-          benchmarks[i] = TraceUtil.wrap(new WALPutBenchmark(regions[i], htd, 
numIterations, noSync,
-              syncInterval, traceFreq), "");
+          benchmarks[i] =
+            new WALPutBenchmark(regions[i], htd, numIterations, noSync, 
syncInterval);
         }
         ConsoleReporter reporter = ConsoleReporter.forRegistry(metrics).
           
outputTo(System.out).convertRatesTo(TimeUnit.SECONDS).filter(MetricFilter.ALL).build();
@@ -379,19 +353,14 @@ public final class WALPerformanceEvaluation extends 
Configured implements Tool {
         if (cleanup) cleanRegionRootDir(fs, rootRegionDir);
       }
     } finally {
+      span.end();
       // We may be called inside a test that wants to keep on using the fs.
       if (!noclosefs) {
         fs.close();
       }
-      if (scope != null) {
-        scope.close();
-      }
-      if (receiverHost != null) {
-        receiverHost.closeReceivers();
-      }
     }
 
-    return(0);
+    return 0;
   }
 
   private static TableDescriptor createHTableDescriptor(final int regionNum,
diff --git a/hbase-shaded/hbase-shaded-client/pom.xml 
b/hbase-shaded/hbase-shaded-client/pom.xml
index 8cfc3f2..f12d103 100644
--- a/hbase-shaded/hbase-shaded-client/pom.xml
+++ b/hbase-shaded/hbase-shaded-client/pom.xml
@@ -78,6 +78,7 @@
                                     <exclude>log4j:*</exclude>
                                     <exclude>commons-logging:*</exclude>
                                     <exclude>org.javassist:*</exclude>
+                                    <exclude>io.opentelemetry:*</exclude>
                                 </excludes>
                             </artifactSet>
                         </configuration>
diff --git a/hbase-shaded/hbase-shaded-testing-util/pom.xml 
b/hbase-shaded/hbase-shaded-testing-util/pom.xml
index dbdec08..7f930cb 100644
--- a/hbase-shaded/hbase-shaded-testing-util/pom.xml
+++ b/hbase-shaded/hbase-shaded-testing-util/pom.xml
@@ -222,6 +222,7 @@
                                     <exclude>log4j:*</exclude>
                                     <exclude>commons-logging:*</exclude>
                                     <exclude>org.javassist:*</exclude>
+                                    <exclude>io.opentelemetry:*</exclude>
                                 </excludes>
                             </artifactSet>
                         </configuration>
diff --git a/hbase-shaded/pom.xml b/hbase-shaded/pom.xml
index 88832ba..d8b4006 100644
--- a/hbase-shaded/pom.xml
+++ b/hbase-shaded/pom.xml
@@ -158,6 +158,7 @@
                                         <exclude>log4j:*</exclude>
                                         <exclude>commons-logging:*</exclude>
                                         <exclude>org.javassist:*</exclude>
+                                        <exclude>io.opentelemetry:*</exclude>
                                     </excludes>
                                 </artifactSet>
                                 <relocations>
diff --git a/hbase-shell/src/main/ruby/shell/commands/trace.rb 
b/hbase-shell/src/main/ruby/shell/commands/trace.rb
index f2a8ee0..598bca4 100644
--- a/hbase-shell/src/main/ruby/shell/commands/trace.rb
+++ b/hbase-shell/src/main/ruby/shell/commands/trace.rb
@@ -17,16 +17,17 @@
 # limitations under the License.
 #
 
-java_import org.apache.hadoop.hbase.trace.SpanReceiverHost
+# Disable tracing for now as HTrace does not work any more
+#java_import org.apache.hadoop.hbase.trace.SpanReceiverHost
 
 module Shell
   module Commands
     class Trace < Command
-      @@conf = org.apache.htrace.core.HTraceConfiguration.fromKeyValuePairs(
-        'sampler.classes', 'org.apache.htrace.core.AlwaysSampler'
-      )
-      @@tracer = 
org.apache.htrace.core.Tracer::Builder.new('HBaseShell').conf(@@conf).build()
-      @@tracescope = nil
+#      @@conf = org.apache.htrace.core.HTraceConfiguration.fromKeyValuePairs(
+#        'sampler.classes', 'org.apache.htrace.core.AlwaysSampler'
+#      )
+#      @@tracer = 
org.apache.htrace.core.Tracer::Builder.new('HBaseShell').conf(@@conf).build()
+#      @@tracescope = nil
 
       def help
         <<-EOF
@@ -57,23 +58,23 @@ EOF
       end
 
       def trace(startstop, spanname)
-        @@receiver ||= SpanReceiverHost.getInstance(@shell.hbase.configuration)
-        if startstop == 'start'
-          unless tracing?
-            @@tracescope = @@tracer.newScope(spanname)
-          end
-        elsif startstop == 'stop'
-          if tracing?
-            @@tracescope.close
-            @@tracescope = nil
-          end
-        end
-        tracing?
+#        @@receiver ||= 
SpanReceiverHost.getInstance(@shell.hbase.configuration)
+#        if startstop == 'start'
+#          unless tracing?
+#            @@tracescope = @@tracer.newScope(spanname)
+#          end
+#        elsif startstop == 'stop'
+#          if tracing?
+#            @@tracescope.close
+#            @@tracescope = nil
+#          end
+#        end
+#        tracing?
       end
 
-      def tracing?
-        @@tracescope != nil
-      end
+#      def tracing?
+#        @@tracescope != nil
+#      end
     end
   end
 end
diff --git a/hbase-zookeeper/pom.xml b/hbase-zookeeper/pom.xml
index 966ef5b..73676c7 100644
--- a/hbase-zookeeper/pom.xml
+++ b/hbase-zookeeper/pom.xml
@@ -144,6 +144,10 @@
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
+    </dependency>
     <!-- Test dependencies -->
     <dependency>
       <groupId>junit</groupId>
diff --git 
a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
 
b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
index 9cc1ab2..5a28b84 100644
--- 
a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
+++ 
b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
@@ -18,17 +18,17 @@
  */
 package org.apache.hadoop.hbase.zookeeper;
 
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.context.Scope;
 import java.io.IOException;
 import java.lang.management.ManagementFactory;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
-
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.RetryCounter;
 import org.apache.hadoop.hbase.util.RetryCounterFactory;
-import org.apache.htrace.core.TraceScope;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.zookeeper.AsyncCallback;
 import org.apache.zookeeper.CreateMode;
@@ -163,7 +163,8 @@ public class RecoverableZooKeeper {
    * exist.
    */
   public void delete(String path, int version) throws InterruptedException, 
KeeperException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.delete")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.delete").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       boolean isRetry = false; // False for first attempt, true for all 
retries.
       while (true) {
@@ -195,6 +196,8 @@ public class RecoverableZooKeeper {
         retryCounter.sleepUntilNextRetry();
         isRetry = true;
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -207,8 +210,9 @@ public class RecoverableZooKeeper {
   }
 
   private Stat exists(String path, Watcher watcher, Boolean watch)
-          throws InterruptedException, KeeperException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.exists")) {
+    throws InterruptedException, KeeperException {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.exists").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       while (true) {
         try {
@@ -234,6 +238,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -264,8 +270,10 @@ public class RecoverableZooKeeper {
   }
 
   private List<String> getChildren(String path, Watcher watcher, Boolean watch)
-          throws InterruptedException, KeeperException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.getChildren")) {
+    throws InterruptedException, KeeperException {
+    Span span =
+      
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.getChildren").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       while (true) {
         try {
@@ -291,6 +299,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -313,8 +323,9 @@ public class RecoverableZooKeeper {
   }
 
   private byte[] getData(String path, Watcher watcher, Boolean watch, Stat 
stat)
-          throws InterruptedException, KeeperException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.getData")) {
+    throws InterruptedException, KeeperException {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.getData").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       while (true) {
         try {
@@ -340,6 +351,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -360,7 +373,8 @@ public class RecoverableZooKeeper {
    */
   public Stat setData(String path, byte[] data, int version)
     throws KeeperException, InterruptedException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.setData")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.setData").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       byte[] newData = ZKMetadata.appendMetaData(id, data);
       boolean isRetry = false;
@@ -398,6 +412,8 @@ public class RecoverableZooKeeper {
         retryCounter.sleepUntilNextRetry();
         isRetry = true;
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -405,9 +421,9 @@ public class RecoverableZooKeeper {
    * getAcl is an idempotent operation. Retry before throwing exception
    * @return list of ACLs
    */
-  public List<ACL> getAcl(String path, Stat stat)
-    throws KeeperException, InterruptedException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.getAcl")) {
+  public List<ACL> getAcl(String path, Stat stat) throws KeeperException, 
InterruptedException {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.getAcl").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       while (true) {
         try {
@@ -427,6 +443,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -436,7 +454,8 @@ public class RecoverableZooKeeper {
    */
   public Stat setAcl(String path, List<ACL> acls, int version)
     throws KeeperException, InterruptedException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.setAcl")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.setAcl").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       while (true) {
         try {
@@ -456,6 +475,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -474,10 +495,10 @@ public class RecoverableZooKeeper {
    *
    * @return Path
    */
-  public String create(String path, byte[] data, List<ACL> acl,
-      CreateMode createMode)
+  public String create(String path, byte[] data, List<ACL> acl, CreateMode 
createMode)
     throws KeeperException, InterruptedException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.create")) {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.create").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       byte[] newData = ZKMetadata.appendMetaData(id, data);
       switch (createMode) {
         case EPHEMERAL:
@@ -492,6 +513,8 @@ public class RecoverableZooKeeper {
           throw new IllegalArgumentException("Unrecognized CreateMode: " +
               createMode);
       }
+    } finally {
+      span.end();
     }
   }
 
@@ -604,9 +627,9 @@ public class RecoverableZooKeeper {
   /**
    * Run multiple operations in a transactional manner. Retry before throwing 
exception
    */
-  public List<OpResult> multi(Iterable<Op> ops)
-    throws KeeperException, InterruptedException {
-    try (TraceScope scope = 
TraceUtil.createTrace("RecoverableZookeeper.multi")) {
+  public List<OpResult> multi(Iterable<Op> ops) throws KeeperException, 
InterruptedException {
+    Span span = 
TraceUtil.getGlobalTracer().spanBuilder("RecoverableZookeeper.multi").startSpan();
+    try (Scope scope = span.makeCurrent()) {
       RetryCounter retryCounter = retryCounterFactory.create();
       Iterable<Op> multiOps = prepareZKMulti(ops);
       while (true) {
@@ -627,6 +650,8 @@ public class RecoverableZooKeeper {
         }
         retryCounter.sleepUntilNextRetry();
       }
+    } finally {
+      span.end();
     }
   }
 
diff --git a/pom.xml b/pom.xml
index f23d0db..f61bdad 100755
--- a/pom.xml
+++ b/pom.xml
@@ -1212,6 +1212,25 @@
             </configuration>
           </execution>
           <execution>
+            <id>banned-htrace</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <bannedDependencies>
+                  <excludes>
+                    <exclude>org.apache.htrace:**</exclude>
+                  </excludes>
+                  <message>
+                    Use OpenTelemetry instead
+                  </message>
+                  <searchTransitive>false</searchTransitive>
+                </bannedDependencies>
+              </rules>
+            </configuration>
+          </execution>
+          <execution>
             <id>check-aggregate-license</id>
             <!-- must check after LICENSE is built at 'generate-resources' -->
             <phase>process-resources</phase>
@@ -1320,9 +1339,10 @@
                 <restrictImports 
implementation="de.skuzzle.enforcer.restrictimports.rule.RestrictImports">
                   <includeTestCode>true</includeTestCode>
                   <commentLineBufferSize>512</commentLineBufferSize>
-                  <reason>Do not use htrace v3</reason>
+                  <reason>Do not use htrace</reason>
                   <bannedImports>
                     <bannedImport>org.htrace.**</bannedImport>
+                    <bannedImport>org.apache.htrace.**</bannedImport>
                   </bannedImports>
                 </restrictImports>
                 <restrictImports 
implementation="de.skuzzle.enforcer.restrictimports.rule.RestrictImports">
@@ -1632,7 +1652,7 @@
     <jruby.version>9.2.13.0</jruby.version>
     <junit.version>4.13</junit.version>
     <hamcrest.version>1.3</hamcrest.version>
-    <htrace.version>4.2.0-incubating</htrace.version>
+    <opentelemetry.version>0.12.0</opentelemetry.version>
     <log4j.version>1.2.17</log4j.version>
     <mockito-core.version>2.28.2</mockito-core.version>
     <protobuf.plugin.version>0.6.1</protobuf.plugin.version>
@@ -2299,9 +2319,9 @@
         <scope>test</scope>
       </dependency>
       <dependency>
-        <groupId>org.apache.htrace</groupId>
-        <artifactId>htrace-core4</artifactId>
-        <version>${htrace.version}</version>
+        <groupId>io.opentelemetry</groupId>
+        <artifactId>opentelemetry-api</artifactId>
+        <version>${opentelemetry.version}</version>
       </dependency>
       <dependency>
         <groupId>com.lmax</groupId>

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