[ https://issues.apache.org/jira/browse/MAPREDUCE-5459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun C Murthy updated MAPREDUCE-5459: ------------------------------------- Resolution: Fixed Fix Version/s: 2.1.2-beta Status: Resolved (was: Patch Available) I just committed this. Thanks [~zjshen]! > Update the doc of running MRv1 examples jar on YARN > --------------------------------------------------- > > Key: MAPREDUCE-5459 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5459 > Project: Hadoop Map/Reduce > Issue Type: Bug > Reporter: Zhijie Shen > Assignee: Zhijie Shen > Fix For: 2.1.2-beta > > Attachments: MAPREDUCE-5459.1.patch > > > In addition to adding two env vars: HADOOP_USER_CLASSPATH_FIRST and > HADOOP_CLASSPATH, we still need to add > {code} > <property> > <name>mapreduce.job.user.classpath.first</name> > <value>true</value> > </property> > {code} > in mapred-site.xml to make sure that the MRv1 examples jar runs correctly on > YARN. Some examples will use Java reflection to find the classes in the > examples jar dynamically when they are running. With this configuration, the > MRv1 examples jar will appear before the MRv2 examples jar in CLASSPATH of > the processes in YARN containers. Therefore, the classes found via reflection > will be picked from MRv1 examples jar instead of MRv2 examples jar as well. > MapReduce_Compatibility_Hadoop1_Hadoop2.apt.vm needs to be updated to > document this. -- This message was sent by Atlassian JIRA (v6.1#6144)