[jira] [Comment Edited] (ARTEMIS-2276) Deadlock between QueueImpl and TransactionImpl

["Francesco Nigro (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARTEMIS-2276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16791879#comment-16791879 ] 

Francesco Nigro edited comment on ARTEMIS-2276 at 3/13/19 5:05 PM:
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ASAP :) There is already a message on dev list about the next (incoming) release.

Re the issue I see that is the same as the one I've fixed: MQTT and Stomp are not meant to support direct deliveries and direct delivery cannot happen concurrently with an async delivery.

The fix for the past issue should be enough for this one: you can try the upstream version to check if it works for you (y)


was (Author: nigro.fra@gmail.com):
ASAP :) There is already a message on dev list about the next (incoming) release.

Re the issue I see that is the same as the one I've fixed: MQTT and STomp are not meant to support direct deliveries and direct delivery cannot happen concurrently with an async delivery.

The fix for the past issue should be enough for this one: you can try the upstream version to check if it works for you (y)

> Deadlock between QueueImpl and TransactionImpl
> ----------------------------------------------
>
>                 Key: ARTEMIS-2276
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-2276
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 2.6.4
>            Reporter: Frederik Petersen
>            Priority: Major
>         Attachments: artemis_thread_dump_2.log
>
>
> Hi,
> we just experienced another deadlock in artemis.
> I am attaching the thread dump. The issue seems to be here:
>  
> {code:java}
> "Thread-0 (activemq-netty-threads)" Id=43 BLOCKED on org.apache.activemq.artemis.core.transaction.impl.TransactionImpl@196f00e1 owned by "Thread-7 (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$5@5bda80bf)" Id=87
>  at org.apache.activemq.artemis.core.server.impl.QueueImpl.getRefsOperation(QueueImpl.java:1332)
>  - blocked on org.apache.activemq.artemis.core.transaction.impl.TransactionImpl@196f00e1
>  at org.apache.activemq.artemis.core.server.impl.QueueImpl.getRefsOperation(QueueImpl.java:1328)
>  at org.apache.activemq.artemis.core.server.impl.QueueImpl.acknowledge(QueueImpl.java:1295)
>  at org.apache.activemq.artemis.core.server.impl.MessageReferenceImpl.acknowledge(MessageReferenceImpl.java:207)
>  at org.apache.activemq.artemis.core.server.impl.MessageReferenceImpl.acknowledge(MessageReferenceImpl.java:199)
>  at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.acknowledge(ServerConsumerImpl.java:874)
>  - locked org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl@31c578da
>  at org.apache.activemq.artemis.core.server.impl.ServerSessionImpl.acknowledge(ServerSessionImpl.java:891)
>  at org.apache.activemq.artemis.core.protocol.stomp.StompSession$1.run(StompSession.java:159)
>  at org.apache.activemq.artemis.core.protocol.stomp.StompSession.afterDelivery(StompSession.java:111)
>  at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.proceedDeliver(ServerConsumerImpl.java:469)
>  at org.apache.activemq.artemis.core.server.impl.QueueImpl.proceedDeliver(QueueImpl.java:2936)
>  at org.apache.activemq.artemis.core.server.impl.QueueImpl.deliverDirect(QueueImpl.java:2921)
>  - locked org.apache.activemq.artemis.core.server.impl.QueueImpl@6b7ed217
> [...]
> "Thread-7 (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$5@5bda80bf)" Id=87 BLOCKED on org.apache.activemq.artemis.core.server.impl.QueueImpl@6b7ed217 owned by "Thread-0 (activemq-netty-threads)" Id=43
>  at org.apache.activemq.artemis.core.server.impl.RefsOperation.afterCommit(RefsOperation.java:165)
>  - blocked on org.apache.activemq.artemis.core.server.impl.QueueImpl@6b7ed217
>  at org.apache.activemq.artemis.core.transaction.impl.TransactionImpl.afterCommit(TransactionImpl.java:546)
>  - locked org.apache.activemq.artemis.core.transaction.impl.TransactionImpl@196f00e1
> [...]
> {code}
>  
> Thread-0 locks QueueImpl@6b7ed217.
>  Thread-7 locks TransactionImpl@196f00e1.
>  Thread-0 waits for TransactionImpl@196f00e1.
>  Thread-7 waits for QueueImpl@6b7ed217.
> We had a few mqtt producers, stomp consumers and stomp producers. A few hundred items/sec. deliverDirect disabled on mqtt as suggested by [~clebertsuconic] here: [https://github.com/apache/activemq-artemis/pull/2577#issuecomment-472070556]
> But I guess this dead lock is not the same as the one discussed there.
> Thanks for your help.



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