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Posted to dev@bookkeeper.apache.org by "Sijie Guo (Created) (JIRA)" <ji...@apache.org> on 2011/12/15 08:54:33 UTC

[jira] [Created] (BOOKKEEPER-144) NPE in MessageConsumeCallback

NPE in MessageConsumeCallback
-----------------------------

                 Key: BOOKKEEPER-144
                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-144
             Project: Bookkeeper
          Issue Type: Bug
          Components: hedwig-client
    Affects Versions: 4.0.0
            Reporter: Sijie Guo


Currently we reuse timer to execute retry tasks. And the timer will only be stopped when client stopped.

So in MessageConsumeRetryTask, the topicSubscriberChannel would be null due to closeSubscription or channel disconnected. Then a NPE is thrown when getSubscribeResponseHandler.
{code}
        @Override
        public void run() {
            // Try to consume the message again
            Channel topicSubscriberChannel = client.getSubscriber().getChannelForTopic(topicSubscriber);
            HedwigClientImpl.getResponseHandlerFromChannel(topicSubscriberChannel).getSubscribeResponseHandler()
            .asyncMessageConsume(messageConsumeData.msg);
        }
{code}



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[jira] [Resolved] (BOOKKEEPER-144) NPE in MessageConsumeCallback

Posted by "Sijie Guo (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/BOOKKEEPER-144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sijie Guo resolved BOOKKEEPER-144.
----------------------------------

    Resolution: Duplicate
    
> NPE in MessageConsumeCallback
> -----------------------------
>
>                 Key: BOOKKEEPER-144
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-144
>             Project: Bookkeeper
>          Issue Type: Bug
>          Components: hedwig-client
>    Affects Versions: 4.0.0
>            Reporter: Sijie Guo
>
> Currently we reuse timer to execute retry tasks. And the timer will only be stopped when client stopped.
> So in MessageConsumeRetryTask, the topicSubscriberChannel would be null due to closeSubscription or channel disconnected. Then a NPE is thrown when getSubscribeResponseHandler.
> {code}
>         @Override
>         public void run() {
>             // Try to consume the message again
>             Channel topicSubscriberChannel = client.getSubscriber().getChannelForTopic(topicSubscriber);
>             HedwigClientImpl.getResponseHandlerFromChannel(topicSubscriberChannel).getSubscribeResponseHandler()
>             .asyncMessageConsume(messageConsumeData.msg);
>         }
> {code}

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