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https://issues.apache.org/jira/browse/HDDS-440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anu Engineer reassigned HDDS-440:
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Assignee: Anu Engineer (was: Sree Vaddi)
> Datanode loops forever if it cannot create directories
> ------------------------------------------------------
>
> Key: HDDS-440
> URL: https://issues.apache.org/jira/browse/HDDS-440
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Reporter: Arpit Agarwal
> Assignee: Anu Engineer
> Priority: Blocker
> Labels: newbie
>
> Datanode starts but runs in a tight loop forever if it cannot create the
> DataNode ID directory e.g. due to permissions issues. I encountered this by
> having a typo in my ozone-site.xml for {{ozone.scm.datanode.id}}.
> In just a few minutes the DataNode had generated over 20GB of log+out files
> with the following exception:
> {code:java}
> 2018-09-12 17:28:20,649 WARN
> org.apache.hadoop.util.concurrent.ExecutorHelper: Caught exception in thread
> Datanode State Machine Thread - 2
> 63:
> java.io.IOException: Unable to create datanode ID directories.
> at
> org.apache.hadoop.ozone.container.common.helpers.ContainerUtils.writeDatanodeDetailsTo(ContainerUtils.java:211)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.persistContainerDatanodeDetails(InitDatanodeState.java:131)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.call(InitDatanodeState.java:111)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.call(InitDatanodeState.java:50)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> 2018-09-12 17:28:20,648 WARN
> org.apache.hadoop.util.concurrent.ExecutorHelper: Execution exception when
> running task in Datanode State Mach
> ine Thread - 160
> 2018-09-12 17:28:20,650 WARN
> org.apache.hadoop.util.concurrent.ExecutorHelper: Caught exception in thread
> Datanode State Machine Thread - 1
> 60:
> java.io.IOException: Unable to create datanode ID directories.
> at
> org.apache.hadoop.ozone.container.common.helpers.ContainerUtils.writeDatanodeDetailsTo(ContainerUtils.java:211)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.persistContainerDatanodeDetails(InitDatanodeState.java:131)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.call(InitDatanodeState.java:111)
> at
> org.apache.hadoop.ozone.container.common.states.datanode.InitDatanodeState.call(InitDatanodeState.java:50)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748){code}
> We should just exit since this is a fatal issue.
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