[OOZIE-3300] Hadoop 3 Pig (with Tez) action shall not use given distributed cache

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Won't Fix
• Affects Version/s: 4.3.1
• Component/s: action
• Labels: usability

Environment

Oozie-4.3.1
Hadoop-3

• Assignee: Dénes Bodó
• Reporter: Dénes Bodó
• Created: 02/Jul/18 09:35
• Updated: 07/Jul/18 06:34
• Resolved: 07/Jul/18 06:34

Description

When I run my Pig action and set -x Tez to use Tez as the execution engine, I got the following error:

Caused by: java.lang.RuntimeException: org.apache.hadoop.mapred.InvalidJobConfException: cache file (mapreduce.job.cache.files) scheme: "hdfs" host: "mycluster" port: -1 file: "/tmp/temp257132233/hive-exec-3.0.0.3.0.0.0-1469.jar" conflicts with cache file (mapreduce.job.cache.files)
 hdfs://mycluster/user/oozie/share/lib/lib_20180611041054/pig/hive-exec-3.0.0.3.0.0.0-1469.jar

or

Caused by: java.lang.RuntimeException: org.apache.hadoop.mapred.InvalidJobConfException: cache file (mapreduce.job.cache.files) scheme: "hdfs" host: "ns1" port: -1 file: "/tmp/temp36150863/joda-time-2.9.6.jar" conflicts with cache file (mapreduce.job.cache.files) hdfs://ns1/user/oozie/share/lib/lib_20180612003013/pig/joda-time-2.9.6.jar

When I exclude the conflicting jar, then Pig cannot start due to class not found exception.

I think a workaround or solution? could be if we exclude the mapreduce.job.cache.files and mapreduce.job.cache.archives from pig.properties file.

 

It is a bit scary change because I am not sure if the user's job shall use specific driver or implementation which needs to be on distributed cache.