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Date: Mon, 26 Mar 2012 09:57:27 +0000 (UTC)
From: "Kristam Subba Swathi (Created) (JIRA)" <jira@apache.org>
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Subject: [jira] [Created] (HBASE-5635) If getTaskList() returns null
 splitlogWorker is down. It wont serve any requests.
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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


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 


 



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