[MAPREDUCE-6293] Set job classloader on uber-job's LocalContainerLauncher event thread

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: mr-am
• Hadoop Flags: Reviewed
• Assignee: Sangjin Lee
• Reporter: Sangjin Lee
• Created: 25/Mar/15 18:52
• Updated: 25/Oct/19 20:25
• Resolved: 21/Apr/15 21:30

Description

An uberized job fails if the job classloader is enabled and the job needs to use the thread context classloader to load a class. Some example error in the log:

2015-03-23 23:28:34,675 INFO [main] org.apache.hadoop.mapreduce.v2.util.MRApps: Creating job classloader
...
2015-03-23 23:28:42,096 ERROR [uber-SubtaskRunner] cascading.provider.ServiceLoader: unable to find service class: cascading.tuple.hadoop.collect.HadoopTupleMapFactory, with exception: java.lang.ClassNotFoundException: cascading.tuple.hadoop.collect.HadoopTupleMapFactory