[jira] [Resolved] (IMPALA-6793) Metadata doesn't recover after restarting statestore

["Tianyi Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-6793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tianyi Wang resolved IMPALA-6793.
---------------------------------
       Resolution: Fixed
    Fix Version/s: Impala 2.12.0
                   Impala 3.0

IMPALA-6793: Fix empty metadata after statestore restarts

IMPALA-5990 introduced a bug where restarting the statestore
deterministically clears the metadata without ever coming back. The
cause of the bug is a wrong condition used by catalog to detect the
restart of statestore.

A custom cluster regression test is added. The process restarting
utility function in the custom cluster test is changed into using
shell=True in popen.

Change-Id: I332a60e172af84b93b3544373fe363cdced5e8d0
Reviewed-on: http://gerrit.cloudera.org:8080/9921
Tested-by: Impala Public Jenkins <im...@cloudera.com>
Reviewed-by: Tianyi Wang <tw...@cloudera.com>

> Metadata doesn't recover after restarting statestore
> ----------------------------------------------------
>
>                 Key: IMPALA-6793
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6793
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Catalog
>    Affects Versions: Impala 3.0, Impala 2.12.0
>            Reporter: Tianyi Wang
>            Assignee: Tianyi Wang
>            Priority: Blocker
>             Fix For: Impala 3.0, Impala 2.12.0
>
>
> Currently when the statestore is restarted, impalad would clear its metadata and never recovers . After some investigation, the case is that catalogd doesn't send any metadata to the restarted statestore. This bug is introduced by IMPALA-5990. 



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