[HIVE-2729] Hive sets thread's ContextClassLoader to null

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 0.8.1
• Assignee: Unassigned
• Reporter: Carl Steinbach
• Created: 19/Jan/12 02:46
• Updated: 29/Jan/12 21:13
• Resolved: 29/Jan/12 21:13

Description

From HIVE-2163:

https://issues.apache.org/jira/browse/HIVE-2163?focusedCommentId=13188876&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13188876

We came across this same issue in another scenario - it looks like Hive is somewhere setting the thread's ContextClassLoader to null. I opened HADOOP-7982 to work around the issue from the Hadoop side, but I think Hive must have a bug that causes these problems.
...
Unfortunately the other situation was integrated into some non-open-source software, so it's not easy to reproduce. It does make use of the Hive metadata, so my guess is that calling into some SessionState code (as described above in this ticket) was the culprit. I did verify that the ContextClassLoader was set to null which is what caused the problem, I just couldn't tell how it got that way.

Issue Links

• is related to: HADOOP-7982 UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule
• is related to: HIVE-2163 SquirrelSQL 3.2.1 doesn't work with Hive 0.7.0