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https://issues.apache.org/jira/browse/HADOOP-4933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12658774#action_12658774
]
Amar Kamat commented on HADOOP-4933:
------------------------------------
Here is the stack trace
{noformat}
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$EntryIterator.next(HashMap.java:833)
at java.util.HashMap$EntryIterator.next(HashMap.java:831)
at java.util.HashMap.putAll(HashMap.java:523)
at
org.apache.hadoop.mapred.JobHistory$KeyValuePair.set(JobHistory.java:428)
at
org.apache.hadoop.mapred.JobHistory$KeyValuePair.handle(JobHistory.java:435)
at
org.apache.hadoop.mapred.JobHistory$MetaInfoManager.handle(JobHistory.java:206)
at org.apache.hadoop.mapred.JobHistory.parseLine(JobHistory.java:309)
at org.apache.hadoop.mapred.JobHistory.access$000(JobHistory.java:75)
at
org.apache.hadoop.mapred.JobHistory$MetaInfoManager.(JobHistory.java:183)
at
org.apache.hadoop.mapred.JobHistory.parseHistoryFromFS(JobHistory.java:261)
at
org.apache.hadoop.mapred.jobdetailshistory_jsp._jspService(jobdetailshistory_jsp.java:399)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
{noformat}
> ConcurrentModificationException in JobHistory.java
> --------------------------------------------------
>
> Key: HADOOP-4933
> URL: https://issues.apache.org/jira/browse/HADOOP-4933
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Amar Kamat
> Priority: Critical
>
> {{JobHistory.java}} throws {{ConcurrentModificationException}} while finding
> out the job history version.
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