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https://issues.apache.org/jira/browse/HDDS-354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16636218#comment-16636218
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Hanisha Koneru commented on HDDS-354:
-------------------------------------
Thanks [~ajayydv] for reporting this and [~nandakumar131] for root causing the
issue.
I have uploaded patch v01. Changed the lock in VolumeSet to a
ReentrantReadWriteLock to synchronize {{VolumeSet#volumeMap}}.
> VolumeInfo.getScmUsed throws NPE
> --------------------------------
>
> Key: HDDS-354
> URL: https://issues.apache.org/jira/browse/HDDS-354
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.2.1
> Reporter: Ajay Kumar
> Assignee: Hanisha Koneru
> Priority: Major
> Attachments: HDDS-354.001.patch
>
>
> {code}java.lang.NullPointerException
> at
> org.apache.hadoop.ozone.container.common.volume.VolumeInfo.getScmUsed(VolumeInfo.java:107)
> at
> org.apache.hadoop.ozone.container.common.volume.VolumeSet.getNodeReport(VolumeSet.java:366)
> at
> org.apache.hadoop.ozone.container.ozoneimpl.OzoneContainer.getNodeReport(OzoneContainer.java:264)
> at
> org.apache.hadoop.ozone.container.common.report.NodeReportPublisher.getReport(NodeReportPublisher.java:64)
> at
> org.apache.hadoop.ozone.container.common.report.NodeReportPublisher.getReport(NodeReportPublisher.java:39)
> at
> org.apache.hadoop.ozone.container.common.report.ReportPublisher.publishReport(ReportPublisher.java:86)
> at
> org.apache.hadoop.ozone.container.common.report.ReportPublisher.run(ReportPublisher.java:73)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
> at java.util.concurrent.FutureTask.run(FutureTask.java)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745){code}
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