Chao Sun created HIVE-15441:
-------------------------------
Summary: Provide a config to timeout long compiling queries
Key: HIVE-15441
URL: https://issues.apache.org/jira/browse/HIVE-15441
Project: Hive
Issue Type: Improvement
Components: Query Planning
Reporter: Chao Sun
Assignee: Chao Sun
Sometimes Hive users have long compiling queries which may need to scan
thousands or even more partitions (perhaps by accident). The compilation
process may take a very long time, especially in {{getInputSummary}} where it
need to make NN calls to get info about each input path.
This is bad because it may block many other queries. Parallel compilation may
be useful but still {{getInputSummary}} has a global lock. In this case, it
makes sense to provide Hive admin with a config to put a timeout limit for
compilation, so that these "bad" queries can be blocked.
Note https://issues.apache.org/jira/browse/HIVE-12431 also tries to address
similar issue. However it cancels those queries that are waiting for the
compile lock, which I think is not so useful for our case since the *query
under compile is the one to be blamed.*
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
