[MAPREDUCE-4018] including multiple user jar files into class path is not working

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.0.0
• Component/s: distributed-cache

Environment

submit job from Windows to Linux

• Tags: libjars DistributedCache
• Assignee: Unassigned
• Reporter: Weili Shao
• Created: 16/Mar/12 00:35
• Updated: 16/Mar/12 00:35

Description

I am trying to submit a job which is using some third-party libs. I tried both -libjars and DistributedCache directly. Both are not working until I merge all jar files into one big jar file.

The way I am using -libjars: -libjars <path>/file1.jar,<path>/file2.jar,....
The way I am using DistributedCache:
FileSystem hdfs = FileSystem.get(new URI("hdfs://remotehost:9000"), conf);
DistributedCache.addArchiveToClassPath(new Path("<path>/file1.jar"), conf, hdfs);
DistributedCache.addArchiveToClassPath(new Path("<path>/file2.jar"), conf, hdfs);

The error messages I observed would have been changing if I have different number of jars in the path. It looks like only one of the jars would be in the classpath for any submission. So I decided to merge all jar files into one big jar file and try again. Now it works. It looks like there is a bug to include multiple jar files into classpath.