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Posted to issues@ambari.apache.org by "Suraj Naik (Jira)" <ji...@apache.org> on 2021/01/31 11:16:00 UTC
[jira] [Commented] (AMBARI-25613) Concurrent Host Modification
exception while sending INSTALL/START Host request
[ https://issues.apache.org/jira/browse/AMBARI-25613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17275849#comment-17275849 ]
Suraj Naik commented on AMBARI-25613:
-------------------------------------
[~aonishuk], [~ihorlukianov] please review my PR
> Concurrent Host Modification exception while sending INSTALL/START Host request
> -------------------------------------------------------------------------------
>
> Key: AMBARI-25613
> URL: https://issues.apache.org/jira/browse/AMBARI-25613
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.7.6
> Reporter: Suraj Naik
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> java.lang.RuntimeException: START Host request submission failed: java.lang.RuntimeException: Update Host request submission failed: java.util.ConcurrentModificationException
> at org.apache.ambari.server.topology.AmbariContext.startHost(AmbariContext.java:497)
> at org.apache.ambari.server.topology.ClusterTopologyImpl.startHost(ClusterTopologyImpl.java:268)
> at org.apache.ambari.server.topology.tasks.StartHostTask.runTask(StartHostTask.java:51)
> at org.apache.ambari.server.topology.tasks.TopologyHostTask.run(TopologyHostTask.java:55)
> at org.apache.ambari.server.topology.HostOfferResponse$1.run(HostOfferResponse.java:85)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.RuntimeException: Update Host request submission failed: java.util.ConcurrentModificationException
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider$4.invoke(HostComponentResourceProvider.java:865)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider$4.invoke(HostComponentResourceProvider.java:852)
> at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:465)
> at org.apache.ambari.server.controller.internal.AbstractResourceProvider.modifyResources(AbstractResourceProvider.java:346)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider.doUpdateResources(HostComponentResourceProvider.java:852)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider.start(HostComponentResourceProvider.java:492)
> at org.apache.ambari.server.topology.AmbariContext.startHost(AmbariContext.java:494)
> at org.apache.ambari.server.topology.ClusterTopologyImpl.startHost(ClusterTopologyImpl.java:268)
> at org.apache.ambari.server.topology.tasks.StartHostTask.runTask(StartHostTask.java:51)
> at org.apache.ambari.server.topology.tasks.TopologyHostTask.run(TopologyHostTask.java:55)
> at org.apache.ambari.server.topology.HostOfferResponse$1.run(HostOfferResponse.java:85)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.ConcurrentModificationException: NA
> at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1479)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1477)
> at java.util.HashMap.putMapEntries(HashMap.java:512)
> at java.util.HashMap.<init>(HashMap.java:490)
> at org.apache.ambari.server.topology.HostRequest.getPhysicalTaskMapping(HostRequest.java:458)
> at org.apache.ambari.server.topology.LogicalRequest.getStageSummaries(LogicalRequest.java:286)
> at org.apache.ambari.server.topology.TopologyManager.getPendingHostComponents(TopologyManager.java:823)
> at org.apache.ambari.server.utils.StageUtils.getClusterHostInfo(StageUtils.java:306)
> at org.apache.ambari.server.controller.AmbariManagementControllerImpl.doStageCreation(AmbariManagementControllerImpl.java:2788)
> at org.apache.ambari.server.controller.AmbariManagementControllerImpl.addStages(AmbariManagementControllerImpl.java:3513)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider.updateHostComponents(HostComponentResourceProvider.java:707)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider$4.invoke(HostComponentResourceProvider.java:857)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider$4.invoke(HostComponentResourceProvider.java:852)
> at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:465)
> at org.apache.ambari.server.controller.internal.AbstractResourceProvider.modifyResources(AbstractResourceProvider.java:346)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider.doUpdateResources(HostComponentResourceProvider.java:852)
> at org.apache.ambari.server.controller.internal.HostComponentResourceProvider.start(HostComponentResourceProvider.java:492)
> at org.apache.ambari.server.topology.AmbariContext.startHost(AmbariContext.java:494)
> at org.apache.ambari.server.topology.ClusterTopologyImpl.startHost(ClusterTopologyImpl.java:268)
> at org.apache.ambari.server.topology.tasks.StartHostTask.runTask(StartHostTask.java:51)
> at org.apache.ambari.server.topology.tasks.TopologyHostTask.run(TopologyHostTask.java:55)
> at org.apache.ambari.server.topology.HostOfferResponse$1.run(HostOfferResponse.java:85)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
>
>
> My teammate [~ramkrishna] did some analysis on this one by adding logs and latches and found that the installation and registration though done parallely each thread tries to get the entire cluster’s view of the current physical tasks. So it is bound to happen that when a registration is happening the other thread can do a getPhysicalTaskMapping(). (leading to CME)
>
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