Error mapreduce Job Task Id attempt 1475517800829 0009 m 000000 0 Status FAILED Error Java heap space

Question

Hi Guys,

I am trying to run one map reduce task. But I am getting this below error everytime.

20/04/17 12:19:33 INFO mapreduce.Job: Running job: job_1475517800829_0009
20/04/17 12:19:47 INFO mapreduce.Job: Job job_1475517800829_0009 running in uber mode : false
20/04/17 12:19:47 INFO mapreduce.Job: map 0% reduce 0%
20/04/17 12:20:57 INFO mapreduce.Job: map 100% reduce 0%
20/04/17 12:20:57 INFO mapreduce.Job: Task Id : attempt_1475517800829_0009_m_000000_0, Status : FAILED
Error: Java heap space
Container killed by the ApplicationMaster.
Container killed on request. Exit code is 143
Container exited with a non-zero exit code 143

Answer 1

Hi@Hasid,

To avoid this error, you have to increase heap size for your task. So, you have to add below given  property in your mapred-site.xml file.

<property>
    <name>mapred.child.java.opts</name>
    <value>-Xmx4096m</value>
</property>

Also add this below line in your hadoop-env.sh file.

export HADOOP_OPTS="-Xmx4096m"