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https://issues.apache.org/jira/browse/HBASE-5635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13239650#comment-13239650
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Chinna Rao Lalam commented on HBASE-5635:
-----------------------------------------
In SplitLogWorker.taskLoop() if getTaskList() returns null it is comming out
form taskLoop(). Here when ever getTaskList() return null this thread should
wait and when ever it will be notified it will continue the work. So
splitLogWorker thread wont be exited
Attached the patch with this change.
> 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
> ------------------------------------------
> 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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