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https://issues.apache.org/jira/browse/HDFS-5028?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhaoyunjiong updated HDFS-5028:
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Attachment: (was: MAPREDUCE-5415.patch)
> LeaseRenewer throw java.util.ConcurrentModificationException when timeout
> -------------------------------------------------------------------------
>
> Key: HDFS-5028
> URL: https://issues.apache.org/jira/browse/HDFS-5028
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 1.2.0
> Reporter: zhaoyunjiong
> Attachments: HDFS-5028
>
>
> In LeaseRenewer, when renew() throw SocketTimeoutException, c.abort() will
> remove one dfsclient from dfsclients. Here will throw a
> ConcurrentModificationException because dfsclients changed after the iterator
> created by "for(DFSClient c : dfsclients)":
> Exception in thread "org.apache.hadoop.hdfs.LeaseRenewer$1@75fa1077"
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.hadoop.hdfs.LeaseRenewer.run(LeaseRenewer.java:406)
> at
> org.apache.hadoop.hdfs.LeaseRenewer.access$600(LeaseRenewer.java:69)
> at org.apache.hadoop.hdfs.LeaseRenewer$1.run(LeaseRenewer.java:273)
> at java.lang.Thread.run(Thread.java:662)
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