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Date: Wed, 27 Apr 2011 06:12:04 +0000 (UTC)
From: "Ning Zhang (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Updated] (HIVE-2127) Improve stats gathering reliability by
 retries on failures with hive.stats.retries.max and hive.stats.retries.wait
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     [ https://issues.apache.org/jira/browse/HIVE-2127?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ning Zhang updated HIVE-2127:
-----------------------------

    Status: Patch Available  (was: Open)

Changed the JIRA subject

> Improve stats gathering reliability by retries on failures with hive.stats.retries.max and hive.stats.retries.wait
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-2127
>                 URL: https://issues.apache.org/jira/browse/HIVE-2127
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Ning Zhang
>            Assignee: Ning Zhang
>         Attachments: HIVE-2127.2.patch, HIVE-2127.patch
>
>
> Stats publishing and aggregation only try once and if there is any exception it will fail and return. If many mappers/reducers updating stats at the same time, it is very common to get lock timeout. We should make stats more reliable by retry when there is an SQLException.

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