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Date: Mon, 15 May 2017 16:45:04 +0000 (UTC)
From: "ASF GitHub Bot (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (DRILL-5496) Must restart drillbits whenever a
 secure Hive metastore is restarted
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archived-at: Mon, 15 May 2017 16:45:09 -0000


    [ https://issues.apache.org/jira/browse/DRILL-5496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16010882#comment-16010882 ] 

ASF GitHub Bot commented on DRILL-5496:
---------------------------------------

Github user sudheeshkatkam commented on a diff in the pull request:

    https://github.com/apache/drill/pull/833#discussion_r116541621
  
    --- Diff: contrib/storage-hive/core/src/main/java/org/apache/drill/exec/store/hive/schema/HiveSchemaFactory.java ---
    @@ -105,6 +105,20 @@ private boolean needToImpersonateReadingData() {
         return isDrillImpersonationEnabled && isHS2DoAsSet;
       }
     
    +  /**
    +   * Close this schema factory in preparation for retrying. Attempt to close
    +   * connections, but just ignore any errors.
    +   */
    +
    +  public void close() {
    +    try {
    +      processUserMetastoreClient.close();
    +    } catch (Exception e) { }
    +    try {
    +      metaStoreClientLoadingCache.invalidateAll();
    +    } catch (Exception e) { }
    --- End diff --
    
    Log a warning message?


> Must restart drillbits whenever a secure Hive metastore is restarted
> --------------------------------------------------------------------
>
>                 Key: DRILL-5496
>                 URL: https://issues.apache.org/jira/browse/DRILL-5496
>             Project: Apache Drill
>          Issue Type: Bug
>    Affects Versions: 1.10.0
>            Reporter: Paul Rogers
>            Assignee: Paul Rogers
>             Fix For: 1.11.0
>
>
> DRILL-4964: "Drill fails to connect to hive metastore after hive metastore is restarted unless drillbits are restarted also" attempted to fix a bug in Drill in which Drill hangs if Hive is restarted. Now, we see that all subsequent "show schemas" queries fail.
> Steps to repro:
> 1. Build a secure cluster (we used MapR)
> 2. Install Hive and Drill services
> 3. Configure drill impersonation and authentication
> 4. Restart hivemeta service
> 5. Connect to drill and execute query involving hive storage, issue occurs
> 6. Restart the drill-bits services and execute the query, issue is no longer hit
> The problem occurs in the same place as the earlier fix, but might represent a slightly different use case: in this case the connection is secure.


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