Hadoop task failed for Java heap space
Console logs:12/12/02 16:32:19 INFO mapreduce.Job:map 1% reduce 0%
12/12/02 16:32:29 INFO mapreduce.Job:map 2% reduce 0%
12/12/02 16:32:29 INFO mapreduce.Job: Task Id : attempt_1354455034384_0007_m_000005_1, Status : FAILED
Error: Java heap space
12/12/02 16:32:36 INFO mapreduce.Job:map 3% reduce 0%
12/12/02 16:32:40 INFO mapreduce.Job: Task Id : attempt_1354455034384_0007_m_000006_1, Status : FAILED
Error: Java heap space
12/12/02 16:32:43 INFO mapreduce.Job:map 4% reduce 0%
12/12/02 16:32:51 INFO mapreduce.Job: Task Id : attempt_1354455034384_0007_m_000005_2, Status : FAILED
Error: Java heap space
12/12/02 16:32:53 INFO mapreduce.Job:map 5% reduce 0%
12/12/02 16:33:00 INFO mapreduce.Job:map 6% reduce 0%
12/12/02 16:33:03 INFO mapreduce.Job: Task Id : attempt_1354455034384_0007_m_000006_2, Status : FAILED
Error: Java heap space
File logs:
2012-12-02 16:36:18,332 INFO org.apache.hadoop.mapred.Task:Using ResourceCalculatorPlugin : org.apache.hadoop.yarn.util.LinuxResourceCalculatorPlugin@3582c132
2012-12-02 16:36:21,168 FATAL org.apache.hadoop.mapred.YarnChild: Error running child : java.lang.OutOfMemoryError: Java heap space
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:912)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:638)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:709)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:332)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:152)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1332)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:147)
Fix solution:
1. mapred-site.xml add:
<property>
<name>mapred.child.java.opts</name>
<value>-Xmx512m</value>
</property>
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