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MapReduce >> mail # user >> FAILED EMFILE: Too many open files


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FAILED EMFILE: Too many open files
While i am trying to run a MR Job I am getting
" FAILED EMFILE: Too many open files "
 at org.apache.hadoop.io.nativeio.NativeIO.open(Native Method)
at org.apache.hadoop.io.SecureIOUtils.createForWrite(SecureIOUtils.java:172)
 at org.apache.hadoop.mapred.TaskLog.writeToIndexFile(TaskLog.java:310)
at org.apache.hadoop.mapred.TaskLog.syncLogs(TaskLog.java:383)
 at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
at java.security.AccessController.doPrivileged(Native Method)
 at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
 at org.apache.hadoop.mapred.Child.main(Child.java:262)

Why is it so?

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*Thanks & Regards*

Unmesha Sreeveni U.B
Junior Developer

http://www.unmeshasreeveni.blogspot.in/
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB