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From "ramkrishna.s.vasudevan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5635) If getTaskList() returns null splitlogWorker is down. It wont serve any requests.
Date Fri, 20 Apr 2012 18:26:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258447#comment-13258447
] 

ramkrishna.s.vasudevan commented on HBASE-5635:
-----------------------------------------------

Reattached the patch and prepared one for 0.94 also.
                
> If getTaskList() returns null splitlogWorker is down. It wont serve any requests. 
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-5635
>                 URL: https://issues.apache.org/jira/browse/HBASE-5635
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.92.1
>            Reporter: Kristam Subba Swathi
>         Attachments: HBASE-5635.1.patch, HBASE-5635.2.patch, HBASE-5635._trunk.patch,
HBASE-5635.patch, HBASE-5635_0.94.patch
>
>
> During the hlog split operation if all the zookeepers are down ,then the paths will be
returned as null and the splitworker thread wil be exited
> Now this regionserver wil not be able to acquire any other tasks since the splitworker
thread is exited
> Please find the attached code for more details
> {code}
> private List<String> getTaskList() {
>     for (int i = 0; i < zkretries; i++) {
>       try {
>         return (ZKUtil.listChildrenAndWatchForNewChildren(this.watcher,
>             this.watcher.splitLogZNode));
>       } catch (KeeperException e) {
>         LOG.warn("Could not get children of znode " +
>             this.watcher.splitLogZNode, e);
>         try {
>           Thread.sleep(1000);
>         } catch (InterruptedException e1) {
>           LOG.warn("Interrupted while trying to get task list ...", e1);
>           Thread.currentThread().interrupt();
>           return null;
>         }
>       }
>     }
> {code}
> in the org.apache.hadoop.hbase.regionserver.SplitLogWorker 
>  

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