[HIVE-18597] LLAP: Always package the log4j2 API jar for org.apache.log4j

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Assignee: Gopal Vijayaraghavan
• Reporter: Gopal Vijayaraghavan
• Created: 31/Jan/18 23:17
• Updated: 22/May/18 23:16
• Resolved: 05/Feb/18 22:29

Description

The log4j 1 and 2.x jars have NDC classes with identical package names.

              // log4j-1.2-API needed for NDC
              org.apache.log4j.NDC.class,

Queries fail with

java.lang.ClassCastException: org.apache.log4j.NDC$DiagnosticContext cannot be cast to java.lang.String
    at org.apache.hadoop.hive.llap.daemon.impl.TaskRunnerCallable.setMDCFromNDC(TaskRunnerCallable.java:312) ~[hive-llap-server-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]

If the service driver packages the log4j1.x jar instead of the 2.x API shim jar.