32GB RAM이있는 시스템에서 MapReduce 작업을 실행하고 있지만 Java 힙 공간 오류가 발생합니다. 나는 작업을 수행 할 수있는 충분한 메모리를 가지기를 희망하면서 32GB로 yarn.nodemanager.resource.memory-mb
을 설정했습니다. 이 문제가 발생하지 않도록 MapReduce v2를 어떻게 설정해야합니까?MapReduce의 Java 힙 공간
편집 :
이16/08/30 19:00:49 INFO mapreduce.Job: Task Id : attempt_1472579604725_0003_m_000000_0, Status : FAILED
Error: Java heap space
16/08/30 19:00:55 INFO mapreduce.Job: Task Id : attempt_1472579604725_0003_m_000000_1, Status : FAILED
Error: Java heap space
16/08/30 19:01:00 INFO mapreduce.Job: Task Id : attempt_1472579604725_0003_m_000000_2, Status : FAILED
Error: Java heap space
[2] mapred-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property> <name>mapreduce.framework.name</name> <value>yarn</value> </property>
<property> <name>mapreduce.jobhistory.done-dir</name> <value>/root/Programs/hadoop/logs/history/done</value> </property>
<property> <name>mapreduce.jobhistory.intermediate-done-dir</name> <value>/root/Programs/hadoop/logs/history/intermediate-done-dir</value> </property>
<property> <name>mapreduce.job.reduces</name> <value>2</value> </property>
<!-- property> <name>yarn.nodemanager.resource.memory-mb</name> <value>10240</value> </property>
<property> <name>yarn.scheduler.minimum-allocation-mb</name> <value>1024</value> </property -->
<!-- property><name>mapreduce.task.files.preserve.failedtasks</name><value>true</value></property>
<property><name>mapreduce.task.files.preserve.filepattern</name><value>*</value></property -->
[3] yarn-site.xml
<configuration>
<property> <name>yarn.log-aggregation-enable</name> <value>true</value> </property>
<property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property>
<property> <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name> <value>org.apache.hadoop.mapred.ShuffleHandler</value> </property>
<property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>s8:8025</value> </property>
<property> <name>yarn.resourcemanager.scheduler.address</name> <value>s8:8030</value> </property>
<property> <name>yarn.resourcemanager.address</name> <value>s8:8032</value> </property>
<property> <name>yarn.log.server.url</name> <value>http://s8:19888/jobhistory/logs/</value> </property>
<!-- job history -->
<property> <name>yarn.log-aggregation-enable</name> <value>true</value> </property>
<property> <name>yarn.nodemanager.log.retain-seconds</name> <value>900000</value> </property>
<property> <name>yarn.nodemanager.remote-app-log-dir</name> <value>/app-logs</value> </property>
<!-- proxy -->
<property><name>yarn.web-proxy.address</name><value>s8:9046</value></property>
<!-- to check the classpath in yarn, do yarn classpath -->
<!-- compress output data -->
<property><name>mapreduce.output.fileoutputformat.compress</name><value>false</value></property>
<property><name>mapred.output.fileoutputformat.compress.codec</name><value>org.apache.hadoop.io.compress.BZip2Codec</value></property>
<!-- Node configuration -->
<property> <name>yarn.nodemanager.resource.memory-mb</name> <value>33554432</value> </property>
</configuration>
'현재 사용법 : 246.6 MB의 1GB 실제 메모리 사용. 34.1GB의 2.1GB 가상 메모리가 사용되었습니다. 컨테이너를 죽이고 .'라고 말하면 잘못된 메모리 값을 조정했다고 생각합니다. 예를 들어, 'yarn.nodemanager.resource.memory-mb'는 YARN 컨테이너에 32 Gb 중 10 Gb 만 할당 할 수 있다고 말합니다 (주석이없는 경우) –
그리고이 값은'yarn-site.xml'에 있어야합니다 ,'mapred-site.xml'이 아닙니다. –