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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9050) HBaseClient#call could hang
Date Fri, 26 Jul 2013 22:47:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13721326#comment-13721326
] 

stack commented on HBASE-9050:
------------------------------

+1  Make it 100ms?  (Its client-side... so ok to burn some cpu!)

[~lhofhansl] might want to take a look.
                
> HBaseClient#call could hang
> ---------------------------
>
>                 Key: HBASE-9050
>                 URL: https://issues.apache.org/jira/browse/HBASE-9050
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 0.94.10
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Minor
>         Attachments: 0.94-9050.patch
>
>
> In HBaseClient#call, we have
> {code}
>     connection.sendParam(call);                 // send the parameter
>     boolean interrupted = false;
>     //noinspection SynchronizationOnLocalVariableOrMethodParameter
>     synchronized (call) {
>       while (!call.done) {
>         try {
>           call.wait();                           // wait for the result
> {code}
> sendParam could do nothing if the connection is closed right after the call is added
into the queue.  Since the connection is closed, we won't get any response, therefore, we
won't get any notify call.  So we will keep waiting here for something won't happen.

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