[
https://issues.apache.org/jira/browse/HADOOP-15566?focusedWorklogId=745363&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-745363
]
ASF GitHub Bot logged work on HADOOP-15566:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 21/Mar/22 18:45
Start Date: 21/Mar/22 18:45
Worklog Time Spent: 10m
Work Description: steveloughran commented on a change in pull request
#3445:
URL: https://github.com/apache/hadoop/pull/3445#discussion_r831412903
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/Span.java
##########
@@ -17,28 +17,54 @@
*/
package org.apache.hadoop.tracing;
+import io.opentelemetry.context.Scope;
+
import java.io.Closeable;
public class Span implements Closeable {
-
+ private io.opentelemetry.api.trace.Span span = null;
Review comment:
1. add some javadoc to line 24 to warn this wraps the opentelemetry span.
2. skip the =null assignment, as it will save the jvm from some needless
init. assuming a lot of spans get created, this may matter
3. give the field a different name. like 'openspan'
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/Span.java
##########
@@ -17,28 +17,54 @@
*/
package org.apache.hadoop.tracing;
+import io.opentelemetry.context.Scope;
+
import java.io.Closeable;
public class Span implements Closeable {
-
+ private io.opentelemetry.api.trace.Span span = null;
public Span() {
}
+ public Span(io.opentelemetry.api.trace.Span span){
+ this.span = span;
+ }
+
public Span addKVAnnotation(String key, String value) {
+ if(span != null){
+ span.setAttribute(key, value);
+ }
return this;
}
public Span addTimelineAnnotation(String msg) {
+ if(span != null){
+ span.addEvent(msg);
+ }
return this;
}
public SpanContext getContext() {
+ if(span != null){
+ return new SpanContext(span.getSpanContext());
+ }
return null;
}
public void finish() {
+ close();
}
public void close() {
+ if(span != null){
+ span.end();
+ }
+ }
+
+ public Scope makeCurrent() {
Review comment:
nit: add javadocs
##########
File path:
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/tracing/TestTracer.java
##########
@@ -0,0 +1,33 @@
+/**
+ * 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.tracing;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
Review comment:
* should extend AbstractHadoopTestBase or HadoopTestBase here.
* there is scope for a lot more tests
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/Span.java
##########
@@ -17,28 +17,54 @@
*/
package org.apache.hadoop.tracing;
+import io.opentelemetry.context.Scope;
+
import java.io.Closeable;
public class Span implements Closeable {
-
+ private io.opentelemetry.api.trace.Span span = null;
public Span() {
}
+ public Span(io.opentelemetry.api.trace.Span span){
+ this.span = span;
+ }
+
public Span addKVAnnotation(String key, String value) {
+ if(span != null){
+ span.setAttribute(key, value);
+ }
return this;
}
public Span addTimelineAnnotation(String msg) {
+ if(span != null){
+ span.addEvent(msg);
+ }
return this;
}
public SpanContext getContext() {
+ if(span != null){
+ return new SpanContext(span.getSpanContext());
+ }
return null;
}
public void finish() {
+ close();
}
public void close() {
+ if(span != null){
+ span.end();
Review comment:
would span need to be nullified here. or is it ok to invoke it after
being ended?
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/SpanContext.java
##########
@@ -18,15 +18,75 @@
package org.apache.hadoop.tracing;
import java.io.Closeable;
+import java.util.HashMap;
+import java.util.Map;
+
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.api.trace.TraceFlags;
+import io.opentelemetry.api.trace.TraceState;
+import io.opentelemetry.api.trace.TraceStateBuilder;
+import org.apache.hadoop.thirdparty.protobuf.ByteString;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
/**
* Wrapper class for SpanContext to avoid using OpenTracing/OpenTelemetry
* SpanContext class directly for better separation.
*/
-public class SpanContext implements Closeable {
- public SpanContext() {
+public class SpanContext implements Closeable {
+ public static final Logger LOG =
LoggerFactory.getLogger(SpanContext.class.getName());
+ private static final String TRACE_ID = "TRACE_ID";
+ private static final String SPAN_ID = "SPAN_ID";
+ private static final String TRACE_FLAGS = "TRACE_FLAGS";
+
+
+ private io.opentelemetry.api.trace.SpanContext spanContext = null;
+ public SpanContext(io.opentelemetry.api.trace.SpanContext spanContext) {
+ this.spanContext = spanContext;
}
public void close() {
+
+ }
+
+ public Map<String, String> getKVSpanContext(){
+ if(spanContext != null){
+ //TODO: may we should move this to Proto
+ Map<String, String> kvMap = new HashMap<>();
+ kvMap.put(TRACE_ID, spanContext.getTraceId());
+ kvMap.put(SPAN_ID, spanContext.getSpanId());
+ kvMap.put(TRACE_FLAGS, spanContext.getTraceFlags().asHex());
+ kvMap.putAll(spanContext.getTraceState().asMap());
+ return kvMap;
+ }
+ return null;
+ }
+
+ static SpanContext buildFromKVMap(Map<String, String> kvMap){
+ try{
+ String traceId = kvMap.get(TRACE_ID);
+ String spanId = kvMap.get(SPAN_ID);
+ String traceFlagsHex = kvMap.get(TRACE_FLAGS);
+ TraceFlags traceFlags = TraceFlags.fromHex(traceFlagsHex, 0);
Review comment:
what if traceFlagsHex isn't found? exit fast
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/SpanContext.java
##########
@@ -18,15 +18,75 @@
package org.apache.hadoop.tracing;
import java.io.Closeable;
+import java.util.HashMap;
+import java.util.Map;
+
+import io.opentelemetry.api.trace.Span;
+import io.opentelemetry.api.trace.TraceFlags;
+import io.opentelemetry.api.trace.TraceState;
+import io.opentelemetry.api.trace.TraceStateBuilder;
+import org.apache.hadoop.thirdparty.protobuf.ByteString;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
/**
* Wrapper class for SpanContext to avoid using OpenTracing/OpenTelemetry
* SpanContext class directly for better separation.
*/
-public class SpanContext implements Closeable {
- public SpanContext() {
+public class SpanContext implements Closeable {
+ public static final Logger LOG =
LoggerFactory.getLogger(SpanContext.class.getName());
+ private static final String TRACE_ID = "TRACE_ID";
+ private static final String SPAN_ID = "SPAN_ID";
+ private static final String TRACE_FLAGS = "TRACE_FLAGS";
+
+
+ private io.opentelemetry.api.trace.SpanContext spanContext = null;
Review comment:
again, give a different field name to avoid more confusion; skip the
assignment to null
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/tracing/TraceUtils.java
##########
@@ -20,28 +20,36 @@
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.thirdparty.protobuf.ByteString;
+import org.slf4j.Logger;
Review comment:
nit: import rules/ordering
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Issue Time Tracking
-------------------
Worklog Id: (was: 745363)
Time Spent: 10h 10m (was: 10h)
> Support OpenTelemetry
> ---------------------
>
> Key: HADOOP-15566
> URL: https://issues.apache.org/jira/browse/HADOOP-15566
> Project: Hadoop Common
> Issue Type: New Feature
> Components: metrics, tracing
> Affects Versions: 3.1.0
> Reporter: Todd Lipcon
> Assignee: Siyao Meng
> Priority: Major
> Labels: pull-request-available, security
> Attachments: HADOOP-15566-WIP.1.patch, HADOOP-15566.000.WIP.patch,
> OpenTelemetry Support Scope Doc v2.pdf, OpenTracing Support Scope Doc.pdf,
> Screen Shot 2018-06-29 at 11.59.16 AM.png, ss-trace-s3a.png
>
> Time Spent: 10h 10m
> Remaining Estimate: 0h
>
> The HTrace incubator project has voted to retire itself and won't be making
> further releases. The Hadoop project currently has various hooks with HTrace.
> It seems in some cases (eg HDFS-13702) these hooks have had measurable
> performance overhead. Given these two factors, I think we should consider
> removing the HTrace integration. If there is someone willing to do the work,
> replacing it with OpenTracing might be a better choice since there is an
> active community.
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