Tao Jie created HDFS-14219:
------------------------------
Summary: 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
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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