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https://issues.apache.org/jira/browse/HIVE-4226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sivaramakrishnan Narayanan updated HIVE-4226:
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Attachment: HIVE-4226.1.patch.txt
Attaching a patch I created against 0.11. Gist of the patch is:
- number of statics have been converted to threadlocals
- some unsafe caches (around inputformats) which relied on statics have been
removed.
- in function registry, I separated the native functions (that live in a
static) and temporary ones (these live in threadlocal)
- changes in ObjectStore to switch from statics to local vars
-
> Cleanup non-threadsafe code in Hive
> -----------------------------------
>
> Key: HIVE-4226
> URL: https://issues.apache.org/jira/browse/HIVE-4226
> Project: Hive
> Issue Type: Improvement
> Reporter: Sivaramakrishnan Narayanan
> Attachments: HIVE-4226.1.patch.txt
>
>
> There is some code in Hive that is not threadsafe. These usually bubble up as
> problems in Hive Server. This JIRA tracks fixing (hopefully, all) of these
> issues.
> Some context: we've implemented a multi-tenant (multiple dbs), multi-threaded
> hive server at Qubole (QHS) which is running in production for a couple of
> months now. As part of this effort, we've fixed a number of instances of
> non-threadsafe code. I'm looking to contribute this back to the community.
> Note that there is no new functionality here - just some better hygiene. If
> there are any stress tests that have revealed hive server bugs in the past,
> it will be great if they can be added to the jira.
> Also, this is my first attempt at contributing to Apache, so please forgive
> any mistakes.
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