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https://issues.apache.org/jira/browse/HDFS-14219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira Ajisaka updated HDFS-14219:
---------------------------------
Fix Version/s: (was: 2.8.5)
> ConcurrentModificationException occurs in datanode occasionally
> ---------------------------------------------------------------
>
> Key: HDFS-14219
> URL: https://issues.apache.org/jira/browse/HDFS-14219
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.8.2
> Reporter: Tao Jie
> Assignee: Tao Jie
> Priority: Minor
> Attachments: HDFS-14129-branch-2.8.001.patch, HDFS-14219.001.patch
>
>
> ERROR occasionally occurs in datanode log:
> ERROR BPServiceActor.java:792 - Exception in BPOfferService for Block pool
> BP-1687106048-10.14.9.17-1535259994856 (Datanode Uuid
> c17e635a-912f-4488-b4e8-93a58a27b5db) service to osscmh-9-21/10.14.9.21:8070
> java.util.ConcurrentModificationException: modification=62852685 !=
> iterModification = 62852684
> at
> org.apache.hadoop.util.LightWeightGSet$SetIterator.ensureNext(LightWeightGSet.java:305)
> at
> org.apache.hadoop.util.LightWeightGSet$SetIterator.hasNext(LightWeightGSet.java:322)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.getBlockReports(FsDatasetImpl.java:1872)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.blockReport(BPServiceActor.java:349)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:648)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:790)
> at java.lang.Thread.run(Thread.java:745)
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