[
https://issues.apache.org/jira/browse/HIVE-21912?focusedWorklogId=272072&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-272072
]
ASF GitHub Bot logged work on HIVE-21912:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Jul/19 09:23
Start Date: 04/Jul/19 09:23
Worklog Time Spent: 10m
Work Description: pvary commented on pull request #698: HIVE-21912:
Implement DisablingDaemonStatisticsHandler
URL: https://github.com/apache/hive/pull/698#discussion_r300310251
##########
File path:
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/metrics/BlacklistingLlapMetricsListener.java
##########
@@ -0,0 +1,200 @@
+/*
+ * Licensed 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.hive.llap.tezplugins.metrics;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
+import com.google.protobuf.ServiceException;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.conf.HiveConf;
+import
org.apache.hadoop.hive.llap.daemon.rpc.LlapDaemonProtocolProtos.SetCapacityRequestProto;
+import org.apache.hadoop.hive.llap.impl.LlapManagementProtocolClientImpl;
+import org.apache.hadoop.hive.llap.metrics.LlapDaemonExecutorInfo;
+import org.apache.hadoop.hive.llap.registry.LlapServiceInstance;
+import org.apache.hadoop.hive.llap.registry.impl.LlapRegistryService;
+import org.apache.hadoop.hive.llap.registry.impl.LlapZookeeperRegistryImpl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Implementation of MetricsListener which blacklists slow nodes based on the
statistics.
+ */
+public class BlacklistingLlapMetricsListener implements LlapMetricsListener {
+ private static final Logger LOG =
LoggerFactory.getLogger(BlacklistingLlapMetricsListener.class);
+ private LlapRegistryService registry;
+ private LlapManagementProtocolClientImplFactory clientFactory;
+ private int minServedTasksNumber;
+ private int maxBlacklistedNodes;
+ private long minConfigChangeDelayMs;
+ private float timeThreshold;
+ private float emptyExecutorsThreshold;
+ @VisibleForTesting
+ long nextCheckTime = Long.MIN_VALUE;
+
+ @VisibleForTesting
+ void init(Configuration conf, LlapRegistryService registry,
LlapManagementProtocolClientImplFactory clientFactory) {
+ this.registry = registry;
+ this.clientFactory = clientFactory;
+ this.minServedTasksNumber =
+ HiveConf.getIntVar(conf,
HiveConf.ConfVars.LLAP_TASK_SCHEDULER_BLACKLISTING_METRICS_LISTENER_MIN_SERVED_TASKS);
+ this.minConfigChangeDelayMs =
+ HiveConf.getTimeVar(conf,
HiveConf.ConfVars.LLAP_TASK_SCHEDULER_BLACKLISTING_METRICS_LISTENER_MIN_CHANGE_DELAY,
+ TimeUnit.MILLISECONDS);
+ this.timeThreshold =
+ HiveConf.getFloatVar(conf,
HiveConf.ConfVars.LLAP_TASK_SCHEDULER_BLACKLISTING_METRICS_LISTENER_TIME_THRESHOLD);
+ this.emptyExecutorsThreshold =
+ HiveConf.getFloatVar(conf,
+
HiveConf.ConfVars.LLAP_TASK_SCHEDULER_BLACKLISTING_METRICS_LISTENER_EMPTY_EXECUTORS);
+ this.maxBlacklistedNodes =
+ HiveConf.getIntVar(conf,
HiveConf.ConfVars.LLAP_TASK_SCHEDULER_BLACKLISTING_METRICS_LISTENER_MAX_LISTED_NODES);
+
+ Preconditions.checkArgument(minServedTasksNumber > 0,
+ "Minimum served tasks should be greater than 0");
+ Preconditions.checkArgument(minConfigChangeDelayMs > 0,
+ "Minimum config change delay should be greater than 0");
+ Preconditions.checkArgument(timeThreshold > 1.0f,
+ "The time threshold should be greater than 1");
+ Preconditions.checkArgument(maxBlacklistedNodes > 0,
+ "The maximum number of blacklisted node should be greater than 1");
+
+ LOG.debug("BlacklistingLlapMetricsListener initialized with " +
+ "minServedTasksNumber={}, " +
+ "minConfigChangeDelayMs={}, " +
+ "timeThreshold={}, " +
+ "emptyExecutorsThreshold={}, " +
+ "maxBlacklistedNodes={}",
+ minServedTasksNumber, minConfigChangeDelayMs, timeThreshold,
emptyExecutorsThreshold, maxBlacklistedNodes);
+ }
+
+ @Override
+ public void init(Configuration conf, LlapRegistryService registry) {
+ init(conf, registry,
LlapManagementProtocolClientImplFactory.basicInstance(conf));
+ }
+
+ @Override
+ public void newDaemonMetrics(String workerIdentity,
LlapMetricsCollector.LlapMetrics newMetrics) {
+ // no op
+ }
+
+ @Override
+ public void newClusterMetrics(Map<String, LlapMetricsCollector.LlapMetrics>
newMetrics) {
+ long sumAverageTime = 0;
+ long sumEmptyExecutors = 0;
+ long maxAverageTime = 0;
+ long maxAverageTimeEmptyExecutors = 0;
+ long maxAverageTimeMaxExecutors = 0;
+ long workerNum = 0;
+ int blacklistedNodes = 0;
+ String maxAverageTimeIdentity = null;
+ for (String workerIdentity : newMetrics.keySet()) {
+ Map<String, Long> metrics = newMetrics.get(workerIdentity).getMetrics();
+ long requestHandled =
metrics.get(LlapDaemonExecutorInfo.ExecutorTotalRequestsHandled.name());
+ long averageTime =
metrics.get(LlapDaemonExecutorInfo.AverageResponseTime.name());
+ long emptyExecutor =
+
metrics.get(LlapDaemonExecutorInfo.ExecutorNumExecutorsAvailableAverage.name());
+ long maxExecutors =
metrics.get(LlapDaemonExecutorInfo.ExecutorNumExecutorsPerInstance.name());
+
+ LOG.debug("Checking node {} with data: " +
+ "requestHandled={}, " +
+ "averageTime={}, " +
+ "emptyExecutors={}, " +
+ "maxExecutors={}",
+ workerIdentity, requestHandled, averageTime, emptyExecutor,
maxExecutors);
+
+ if (maxExecutors == 0) {
+ blacklistedNodes++;
+ if (blacklistedNodes >= this.maxBlacklistedNodes) {
+ LOG.debug("Already too many blacklisted nodes. Skipping.");
+ return;
+ }
+ }
+
+ if (requestHandled > this.minServedTasksNumber) {
+ workerNum++;
+ sumAverageTime += averageTime;
+ if ( averageTime > maxAverageTime) {
+ maxAverageTime = averageTime;
+ maxAverageTimeEmptyExecutors = emptyExecutor;
+ maxAverageTimeMaxExecutors = maxExecutors;
+ maxAverageTimeIdentity = workerIdentity;
+ }
+ sumEmptyExecutors += emptyExecutor;
+ }
+ }
+
+ // If we do not have enough data then return.
+ if (workerNum < 2) {
+ return;
+ }
+
+ LOG.debug("Found slowest node {} with data: " +
+ "sumAverageTime={}, " +
+ "sumEmptyExecutors={}, " +
+ "maxAverageTime={}, " +
+ "maxAverageTimeEmptyExecutors={}, " +
+ "maxAverageTimeMaxExecutors={}, " +
+ "workerNum={}, " +
+ "maxAverageTimeIdentity={}, " +
+ "blacklistedNodes={}",
+ sumAverageTime, sumEmptyExecutors, maxAverageTime,
maxAverageTimeEmptyExecutors,
+ maxAverageTimeMaxExecutors, workerNum, maxAverageTimeIdentity,
blacklistedNodes);
+ // Check if the slowest node is at least timeThreshold times slower than
the average
+ long averageTimeWithoutSlowest = (sumAverageTime - maxAverageTime) /
(workerNum - 1);
+ if (averageTimeWithoutSlowest * this.timeThreshold < maxAverageTime) {
+ // We have a candidate, let's see if we have enough empty executors.
+ long emptyExecutorsWithoutSlowest = sumEmptyExecutors -
maxAverageTimeEmptyExecutors;
+ if (emptyExecutorsWithoutSlowest > maxAverageTimeMaxExecutors *
this.emptyExecutorsThreshold) {
+ // Seems like a good candidate, let's try to blacklist
+ try {
+ LOG.debug("Trying to blacklist node: " + maxAverageTimeIdentity);
+ setCapacity(maxAverageTimeIdentity, 0, 0);
+ } catch (Throwable t) {
+ LOG.debug("Can not blacklist node: " + maxAverageTimeIdentity, t);
+ }
+ }
+ }
+ }
+
+ protected void setCapacity(String workerIdentity, int newExecutorNum, int
newWaitQueueSize)
+ throws IOException, ServiceException {
+ long currentTime = System.currentTimeMillis();
+ if (currentTime > nextCheckTime) {
+ LlapZookeeperRegistryImpl.ConfigChangeLockResult lockResult =
+ registry.lockForConfigChange(currentTime +
this.minConfigChangeDelayMs);
+
+ LOG.debug("Got result for lock check: {}", lockResult);
+ if (lockResult.isSuccess()) {
+ LOG.info("Setting capacity for workerIdentity={} to newExecutorNum={},
newWaitQueueSize={}",
+ workerIdentity, newExecutorNum, newWaitQueueSize);
+ LlapServiceInstance serviceInstance =
registry.getInstances().getInstance(workerIdentity);
+ LlapManagementProtocolClientImpl client =
clientFactory.create(serviceInstance);
Review comment:
This client implementation is for a specific worker. I hope we do not have
to reuse the client to blacklist the same node twice :D
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Issue Time Tracking
-------------------
Worklog Id: (was: 272072)
Time Spent: 4h (was: 3h 50m)
> Implement BlacklistingLlapMetricsListener
> -----------------------------------------
>
> Key: HIVE-21912
> URL: https://issues.apache.org/jira/browse/HIVE-21912
> Project: Hive
> Issue Type: Sub-task
> Components: llap, Tez
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21912.patch, HIVE-21912.wip-2.patch,
> HIVE-21912.wip.patch
>
> Time Spent: 4h
> Remaining Estimate: 0h
>
> We should implement a DaemonStatisticsHandler which:
> * If a node average response time is bigger than 150% (configurable) of the
> other nodes
> * If the other nodes has enough empty executors to handle the requests
> Then disables the limping node.
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