[YARN-10328] Too many ZK Curator NodeExists exception logs in YARN Service AM logs

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: yarn
• Target Version/s: 3.4.0
• Assignee: Bilwa S T
• Reporter: Bilwa S T
• Created: 25/Jun/20 13:52
• Updated: 26/Jan/24 05:53
• Resolved: 29/Jun/20 16:23

Description

Following debug logs are printed everytime when component is started.

[pool-6-thread-3] DEBUG zk.CuratorService - path already present: /registry/users/server/services/yarn-service/default-worker/components
org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for /registry/users/hetuserver/services/yarn-service/default-worker/components
	at org.apache.zookeeper.KeeperException.create(KeeperException.java:128)
	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
	at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1480)
	at org.apache.curator.framework.imps.CreateBuilderImpl$11.call(CreateBuilderImpl.java:740)
	at org.apache.curator.framework.imps.CreateBuilderImpl$11.call(CreateBuilderImpl.java:723)
	at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:109)
	at org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:720)
	at org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:484)
	at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:474)
	at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:454)
	at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:44)
	at org.apache.hadoop.registry.client.impl.zk.CuratorService.zkMkPath(CuratorService.java:587)
	at org.apache.hadoop.registry.client.impl.zk.RegistryOperationsService.mknode(RegistryOperationsService.java:99)
	at org.apache.hadoop.yarn.service.registry.YarnRegistryViewForProviders.putComponent(YarnRegistryViewForProviders.java:146)
	at org.apache.hadoop.yarn.service.registry.YarnRegistryViewForProviders.putComponent(YarnRegistryViewForProviders.java:128)
	at org.apache.hadoop.yarn.service.component.instance.ComponentInstance.updateServiceRecord(ComponentInstance.java:511)
	at org.apache.hadoop.yarn.service.component.instance.ComponentInstance.updateContainerStatus(ComponentInstance.java:449)
	at org.apache.hadoop.yarn.service.component.instance.ComponentInstance$ContainerStatusRetriever.run(ComponentInstance.java:620)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)