[ https://issues.apache.org/jira/browse/MAPREDUCE-1813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod K V updated MAPREDUCE-1813: --------------------------------- Status: Patch Available (was: Open) Hadoop Flags: [Reviewed] +1 for the patch. Submitting to Hudson. > NPE in PipeMapred.MRErrorThread > ------------------------------- > > Key: MAPREDUCE-1813 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1813 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: contrib/streaming > Affects Versions: 0.20.1 > Reporter: Amareshwari Sriramadasu > Assignee: Ravi Gummadi > Fix For: 0.22.0 > > Attachments: 1813.patch, 1813.v1.2.patch, 1813.v1.3.patch, > 1813.v1.4.patch, 1813.v1.patch > > > Some reduce tasks fail with following NPE > java.lang.RuntimeException: java.lang.NullPointerException > at > org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325) > at > org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:540) > at org.apache.hadoop.streaming.PipeReducer.close(PipeReducer.java:137) > at > org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:474) > at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:412) > at org.apache.hadoop.mapred.Child.main(Child.java:159) > Caused by: java.lang.NullPointerException > at > org.apache.hadoop.streaming.PipeMapRed$MRErrorThread.setStatus(PipeMapRed.java:517) > at > org.apache.hadoop.streaming.PipeMapRed$MRErrorThread.run(PipeMapRed.java:449) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.