zhaoyunjiong created MAPREDUCE-5415:
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Summary: LeaseRenewer throw
java.util.ConcurrentModificationException when timeout
Key: MAPREDUCE-5415
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5415
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 1.2.0
Reporter: zhaoyunjiong
Assignee: zhaoyunjiong
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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