Error In Shuffle In Fetcher
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Hadoop Shuffle Out Of Memory
only takes a minute: Sign up Hadoop error in shuffle in fetcher: Exceeded MAX_FAILED_UNIQUE_FETCHES up vote 3 down vote favorite I am new to hadoop. I have a kerberos security enabled hadoop cluster (master and 1 slave) set up on a virtual box. I am trying to run a job from the hadoop examples 'pi'. The job terminates with the error Exceeded MAX_FAILED_UNIQUE_FETCHES. I tried searching for this error but the solutions given on the internet do not seem to be working for me. Perhaps I am missing something obvious. I even tried removing the slave from the etc/hadoop/slaves file to see if the job can run only on the master but that fails as well with the same error. Below is the log. I am running this on 64-bit Ubuntu 14.04 virtual box. Any help appreciated. montauk@montauk-vmaster:/usr/local/hadoop$ sudo -u yarn bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.4.0.jar pi 2 10 Number of Maps = 2 Samples per Map = 10 OpenJDK 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. It's highly recommended that you fix the library with 'execstack -c
throws "java.lang.OutOfMemoryError: Java heap space"Agile Board ExportXMLWordPrintableJSON Details Type: Bug Status: Open Priority: Minor Resolution: Unresolved Affects Version/s: 2.5.0, 2.6.0, 2.5.1, 2.7.1 Fix Version/s: None Component/s: http://stackoverflow.com/questions/24066128/hadoop-error-in-shuffle-in-fetcher-exceeded-max-failed-unique-fetches None Labels: None Description 2015-08-11 14:03:54,550 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child : org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in fetcher#10 at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:134) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:376) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168) at java.security.AccessController.doPrivileged(Native https://issues.apache.org/jira/browse/MAPREDUCE-6447 Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163) Caused by: java.lang.OutOfMemoryError: Java heap space at org.apache.hadoop.io.BoundedByteArrayOutputStream.
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ShuffleError is thrown: Error: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in fetcher#50 at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:121) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:380) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162) 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:1491) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157) Caused by: java.lang.OutOfMemoryError: Java heap space at org.apache.hadoop.io.BoundedByteArrayOutputStream.