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From "Zhihong Yu (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5635) If getTaskList() returns null splitlogWorker is down. It wont serve any requests.
Date Tue, 27 Mar 2012 17:44:29 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhihong Yu updated HBASE-5635:
------------------------------

    Description: 
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 


 



  was:
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
------------------------------------------
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;
        }
      }
    }

in the org.apache.hadoop.hbase.regionserver.SplitLogWorker 


 



    
> 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.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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