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https://issues.apache.org/jira/browse/HIVE-1482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895997#action_12895997
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Bennie Schut commented on HIVE-1482:
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Ok I think I covered the sync stuff like you sugested.
For the state part I was looking at how SessionState is used within the
HiveConnection.
There are several spots where we pass a sessionstate object
(HivePreparedStatement, HiveStatement) but both places end up not actually
using the object. Simplest thing would be not to pass them. But even if we do
pass it I think it only contains session data and not query specific data.
Query specific things like column names/types etc. can be done nicely within a
sync block together with the client call for the query itself so that shouldn't
be a problem.
I'll upload a patch with what I have soon.
> Not all jdbc calls are threadsafe.
> ----------------------------------
>
> Key: HIVE-1482
> URL: https://issues.apache.org/jira/browse/HIVE-1482
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Drivers
> Affects Versions: 0.7.0
> Reporter: Bennie Schut
> Fix For: 0.7.0
>
>
> As per jdbc spec they should be threadsafe:
> http://download.oracle.com/docs/cd/E17476_01/javase/1.3/docs/guide/jdbc/spec/jdbc-spec.frame9.html
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