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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4973) On failure, HBaseAdmin sleeps one time too many
Date Thu, 08 Dec 2011 01:14:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164898#comment-13164898
] 

Hadoop QA commented on HBASE-4973:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12506544/4973_HBaseAdmin.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 javadoc.  The javadoc tool appears to have generated -160 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 72 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/470//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/470//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/470//console

This message is automatically generated.
                
> On failure, HBaseAdmin sleeps one time too many
> -----------------------------------------------
>
>                 Key: HBASE-4973
>                 URL: https://issues.apache.org/jira/browse/HBASE-4973
>             Project: HBase
>          Issue Type: Improvement
>          Components: client
>    Affects Versions: 0.94.0
>            Reporter: nkeywal
>            Assignee: nkeywal
>            Priority: Minor
>         Attachments: 4973_HBaseAdmin.patch
>
>
> In this code last sleep is useless as we're not retrying. This can slow down failure
scenarios by a few seconds (up to 32 second).
> {noformat}
>   public HBaseAdmin(Configuration c)
>   throws MasterNotRunningException, ZooKeeperConnectionException {
>     this.conf = HBaseConfiguration.create(c);
>       this.connection = HConnectionManager.getConnection(this.conf);
>     this.pause = this.conf.getLong("hbase.client.pause", 1000);
>     this.numRetries = this.conf.getInt("hbase.client.retries.number", 10);
>     this.retryLongerMultiplier = this.conf.getInt(
>         "hbase.client.retries.longer.multiplier", 10);
>     int tries = 0;
>     for (; tries < numRetries; ++tries) {
>       try {
>         this.connection.getMaster();
>         break;
>       } catch (MasterNotRunningException mnre) {
>         HConnectionManager.deleteStaleConnection(this.connection);
>         this.connection = HConnectionManager.getConnection(this.conf);
>       } catch (UndeclaredThrowableException ute) {
>         HConnectionManager.deleteStaleConnection(this.connection);
>         this.connection = HConnectionManager.getConnection(this.conf);
>       }
>       try { // Sleep
>         Thread.sleep(getPauseTime(tries));
>       } catch (InterruptedException e) {
>         Thread.currentThread().interrupt();
>         // we should delete connection between client and zookeeper
>         HConnectionManager.deleteStaleConnection(this.connection);
>         throw new MasterNotRunningException("Interrupted");
>       }
>     }
>     if (tries >= numRetries) {
>       // we should delete connection between client and zookeeper
>       HConnectionManager.deleteStaleConnection(this.connection);
>       throw new MasterNotRunningException("Retried " + numRetries + " times");
>     }
>   }
> {noformat}

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