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https://issues.apache.org/jira/browse/ARTEMIS-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17531244#comment-17531244
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David Bennion edited comment on ARTEMIS-3809 at 5/3/22 3:43 PM:
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Just ran and put a breakpoint on LargeMessageControllerImpl:294. (attempting
to get it to occur again). Verified that readTimeout *IS* set to 30000 (30
seconds), as you suggested.
I am now suspecting that we are stuck in that while loop and will never get a
streamEnded. (given that every time I get a stack trace when we are stuck it
still points to that line. It is a matter of nano-seconds to do the loop and
get back to the 30s wait() call)
Will try to substantiate this with the debugger in context when the issue
actually happens (slow going).
was (Author: JIRAUSER288845):
Just ran and put a breakpoint on LargeMessageControllerImpl:294. (attempting
to get it to occur again). Verified that readTimeout *IS* set to 30000 (30
seconds), as you suggested.
I am now suspecting that we are stuck in that while loop and will never get a
streamEnded.
Will try to substantiate this with the debugger in the context when the issue
actually happens (slow going).
> LargeMessageControllerImpl hangs the message consume
> ----------------------------------------------------
>
> Key: ARTEMIS-3809
> URL: https://issues.apache.org/jira/browse/ARTEMIS-3809
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Affects Versions: 2.21.0
> Environment: OS: Windows Server 2019
> JVM: OpenJDK 64-Bit Server VM Temurin-17.0.1+12
> Max Memory (-Xmx): 6GB
> Allocated to JVM: 4.168GB
> Currently in use: 3.398GB (heap 3.391GB, non-heap 0.123GB)
> Reporter: David Bennion
> Priority: Major
> Labels: test-stability
>
> I wondered if this might be a recurrence of issue ARTEMIS-2293 but this
> happens on 2.21.0 and I can see the code change in
> LargeMessageControllerImpl.
> Using the default min-large-message-size of 100K. (defaults)
> Many messages are passing through the broker when this happens. I would
> anticipate that most of the messages are smaller than 100K, but clearly some
> of them must exceed. After some number of messages, a particular consumer
> ceases to consume messages.
> After the system became "hung" I was able to get a stack trace and I was able
> to identify that the system is stuck in an Object.wait() for a notify that
> appears to never come.
> Here is the trace I was able to capture:
> {code:java}
> Thread-2 (ActiveMQ-client-global-threads) id=78 state=TIMED_WAITING
> - waiting on <0x43523a75> (a
> org.apache.activemq.artemis.core.client.impl.LargeMessageControllerImpl)
> - locked <0x43523a75> (a
> org.apache.activemq.artemis.core.client.impl.LargeMessageControllerImpl)
> at [email protected]/java.lang.Object.wait(Native Method)
> at
> org.apache.activemq.artemis.core.client.impl.LargeMessageControllerImpl.waitCompletion(LargeMessageControllerImpl.java:294)
> at
> org.apache.activemq.artemis.core.client.impl.LargeMessageControllerImpl.saveBuffer(LargeMessageControllerImpl.java:268)
> at
> org.apache.activemq.artemis.core.client.impl.ClientLargeMessageImpl.checkBuffer(ClientLargeMessageImpl.java:157)
> at
> org.apache.activemq.artemis.core.client.impl.ClientLargeMessageImpl.getBodyBuffer(ClientLargeMessageImpl.java:89)
> at mypackage.MessageListener.handleMessage(MessageListener.java:46)
> {code}
>
> The app can run either as a single node using the InVM transporter or as a
> cluster using the TCP. To my knowledge, I have only seen this issue occur on
> the InVM.
> I am not expert in this code, but I can tell from the call stack that 0 must
> be the value of timeWait passed into waitCompletion(). But from what I can
> discern of the code changes in 2.21.0, it should be adjusting the
> readTimeout to the timeout of the message (I think?) such that it causes the
> read to eventually give up rather than remaining blocked forever.
> We have persistenceEnabled = false, which leads me to believe that the only
> disk activity for messages should be related to large messages(?).
> On a machine and context where this was consistently happening, I adjusted
> the min-large-message-size upwards and the problem went away. This makes
> sense for my application, but ultimately if a message goes across the
> threshold to become large it appears to hang the consumer indefinitely.
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