ConcurrentModificationException from org.apache.hadoop.ipc.Server$Responder in
JobTracker
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Key: HADOOP-3010
URL: https://issues.apache.org/jira/browse/HADOOP-3010
Project: Hadoop Core
Issue Type: Bug
Components: ipc
Reporter: Amar Kamat
I see lot of these in my JobTracker log
{noformat}
WARN org.apache.hadoop.ipc.Server: Exception in Responder
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$KeyIterator.next(HashMap.java:827)
at
java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
at org.apache.hadoop.ipc.Server$Responder.run(Server.java:475)
{noformat}
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