Eugene Koifman created HIVE-5001:
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Summary: [WebHCat] JobState is read/written with different user
credentials
Key: HIVE-5001
URL: https://issues.apache.org/jira/browse/HIVE-5001
Project: Hive
Issue Type: Bug
Components: HCatalog
Affects Versions: 0.11.0
Reporter: Eugene Koifman
JobState can be persisted to HDFS or Zookeeper. At various points in the
lifecycle it's accessed with different user credentials thus may cause errors
depending on how permissions are set.
Example:
When submitting a MR job, templeton.JarDelegator is used.
It calls LauncherDelegator#queueAsUser() which runs TempletonControllerJob with
UserGroupInformation.doAs().
TempletonControllerJob will in turn create JobState and persist it.
LauncherDelegator.registerJob() also modifies JobState but w/o doing a doAs()
So in the later case it's possible that the persisted state of JobState by a
different user than one that created/owns the file.
templeton.tool.HDFSCleanup tries to delete these files w/o doAs.
'childid' file, for example, is created with rw-r--r--.
and it's parent directory (job_201308051224_0001) has rwxr-xr-x.
HDFSStorage doesn't set file permissions explicitly so it must be using default
permissions.
So there is a potential issue here (depending on UMASK) especially once
HIVE-4601 is addressed.
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