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From "Jaewoong Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMQ-4413) Persistent message loss when JMS durable subscriber reconnects regardless of message store impl.
Date Thu, 28 Mar 2013 00:23:15 GMT

     [ https://issues.apache.org/jira/browse/AMQ-4413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jaewoong Choi updated AMQ-4413:
-------------------------------

    Description: 
Persistent message is lost intermittently when JMS durable topic subscriber reconnects to
the broker service.  From the log observation, it seems that the internal states of the store
cursor (i.e. AbstractStoreCursor) is not well guarded by race condition between message sending/directly-dispatching-pending
thread (from publisher) and subscription deactivating thread (from subscriber's closing),
especially when subscriber's closing (javax.jms.MessageConsumer#close) and message publishing
happen simultaneously.

Observations and the test scenario are described at below in detail:
http://activemq.2283324.n4.nabble.com/persistent-message-missing-to-a-durable-subscriber-when-it-reconnects-restarts-td4665130.html

Attached please find Test.java that I used to verify this issue.  I found the issue initially
with activemq-core-5.7.0.jar then confirmed that it's reproducible with other upper versions
(i.e. apache-activemq-5.8-SNAPSHOT, apache-activemq-5.9-SNAPSHOT).

This "message loss" issue is pretty critical as it can happen whenever durable subscriber
reconnects either purposely or unexpectedly, and it's  violating the one of primitive features
that messaging platform guarantees when it happens, whereas it's so easy to reproduce the
trouble.

  was:
Persistent message is lost intermittently when JMS durable topic subscriber reconnects to
the broker service.  From the log observation, it seems that the internal states of the store
cursor (i.e. AbstractStoreCursor) is not well guarded by race condition between message sending/directly-dispatching-pending
thread (from publisher) and subscription deactivating thread (from subscriber's closing),
especially when subscriber's closing (javax.jms.MessageConsumer#close) and message publishing
happen simultaneously.

Observations and the test scenario are described at below in detail:
http://activemq.2283324.n4.nabble.com/persistent-message-missing-to-a-durable-subscriber-when-it-reconnects-restarts-td4665130.html

I have a simple Test.java file that I used to verify this issue (I'll attach this file). 
I encountered this problem initially with activemq-core-5.7.0.jar then confirmed that it's
reproducible with other upper versions (i.e. apache-activemq-5.8-SNAPSHOT, apache-activemq-5.9-SNAPSHOT).

This "message loss" issue is pretty critical as it can happen whenever durable subscriber
reconnects either purposely or unexpectedly, and it's  violating the one of primitive features
that messaging platform guarantees when it happens, whereas it's so easy to reproduce the
trouble.

    
> Persistent message loss when JMS durable subscriber reconnects regardless of message
store impl.
> ------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-4413
>                 URL: https://issues.apache.org/jira/browse/AMQ-4413
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, JMS client, Message Store
>    Affects Versions: 5.7.0, 5.8.0
>            Reporter: Jaewoong Choi
>            Priority: Critical
>         Attachments: Test.java
>
>
> Persistent message is lost intermittently when JMS durable topic subscriber reconnects
to the broker service.  From the log observation, it seems that the internal states of the
store cursor (i.e. AbstractStoreCursor) is not well guarded by race condition between message
sending/directly-dispatching-pending thread (from publisher) and subscription deactivating
thread (from subscriber's closing), especially when subscriber's closing (javax.jms.MessageConsumer#close)
and message publishing happen simultaneously.
> Observations and the test scenario are described at below in detail:
> http://activemq.2283324.n4.nabble.com/persistent-message-missing-to-a-durable-subscriber-when-it-reconnects-restarts-td4665130.html
> Attached please find Test.java that I used to verify this issue.  I found the issue initially
with activemq-core-5.7.0.jar then confirmed that it's reproducible with other upper versions
(i.e. apache-activemq-5.8-SNAPSHOT, apache-activemq-5.9-SNAPSHOT).
> This "message loss" issue is pretty critical as it can happen whenever durable subscriber
reconnects either purposely or unexpectedly, and it's  violating the one of primitive features
that messaging platform guarantees when it happens, whereas it's so easy to reproduce the
trouble.

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