[MAPREDUCE-7055] MR jobs are failing with Could not find or load main class for MRAppMaster

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Resolved
• Affects Version/s: 3.1.0, 3.2.0
• Assignee: Unassigned
• Reporter: Rohith Sharma K S
• Created: 17/Feb/18 19:29
• Updated: 19/Feb/18 14:58
• Resolved: 19/Feb/18 14:58

Description

It is observed that MR jobs are failing with *Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster" even though HADOOP_MAPRED_HOME is set in mapred-site.xml

Tried building tar.gz in branch-3.0 and seems works fine with same configurations. But in branch-3.1 and trunk, it is failing. I got launch_container.sh for both and compared classpath exported before launching AM. Both classpath entries are same, but AM launching is failing with above mentioned error.

Its better to confirm as 3.1 release is going to happen soon.

Issue Links

• is broken by: YARN-7677 Docker image cannot set HADOOP_CONF_DIR