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https://issues.apache.org/jira/browse/AMQ-9855?focusedWorklogId=1005426&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1005426
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ASF GitHub Bot logged work on AMQ-9855:
---------------------------------------
Author: ASF GitHub Bot
Created on: 16/Feb/26 17:48
Start Date: 16/Feb/26 17:48
Worklog Time Spent: 10m
Work Description: cshannon commented on PR #1659:
URL: https://github.com/apache/activemq/pull/1659#issuecomment-3909774098
@pradeep85841 - Looking more at the tests and the changes, the
synchronization keywords don't do anything (at least not for the test). It
looks like what really fixes it is the change inside clearUnmarshalledState.
https://github.com/apache/activemq/pull/1659/changes#diff-6cfa7d25bdb07827afcc060c572b2bed07850282c14893a05dd695fc63bbd5ddR159-R163
Normally if that is called the content should be there and not null, but
that check handles in case it is null by making sure we marshal it first.
Can you re-try without any synchronization and just that fix to see if it
fixes your environment? If we really are copying on dispatch (and we are) and
the copy is done by the broker it just doesn't seem like we should really need
to add synchronization as the messages are meant to be used by one thread at a
time and copied if multiple threads are touching them.
Issue Time Tracking
-------------------
Worklog Id: (was: 1005426)
Time Spent: 5h 40m (was: 5.5h)
> Intermittent null/empty body when consuming from a topic (vm:// transport)
> --------------------------------------------------------------------------
>
> Key: AMQ-9855
> URL: https://issues.apache.org/jira/browse/AMQ-9855
> Project: ActiveMQ
> Issue Type: Bug
> Components: AMQP, Camel
> Affects Versions: 6.2.0, 6.1.2, 6.1.6, 6.1.7
> Reporter: JJ
> Priority: Major
> Fix For: 6.3.0
>
> Time Spent: 5h 40m
> Remaining Estimate: 0h
>
> Also see AMQ-6708 This is very much the same issue but with more details. The
> op on that ticket hasn't been seen since 2017.
> We have a simple AMQ instance using Camel; It connects to an upstream remote
> server via OpenWire and subscribes to topics. It Bridges those topics to the
> local AMQ with some later Camel processing.
> The route looks like this:
> <route id="Route_SPLITTER">
> <from uri="remoteServer:topic:TOPIC_A?durableSubscriptionName=some.user"/>
> <choice>
> <when>
> <simple>${body} == null || ${body} == ''</simple>
> <log message="Received message with missing body:
> ${header.CamelMessageHistory}"/>
> </when>
> <otherwise>
> </otherwise>
> </choice>
>
> <to uri="localAMQ:topic:MY_TOPIC_A"/>
> <split streaming="true" >
> <method ref="Splitter" method="processMessage"/>
> <multicast>
> <to uri="direct:routeSorter"/>
> </multicast>
> </split>
> </route>
>
> Logging was added to make sure it wasn't an upstream issue (and it's not)
>
> The data being passed is formatted as arrays of JSON. The <to
> uri="localAMQ:topic:MY_TOPIC_A"/> just passes it untouched. The Splitter send
> a copy elsewhere to be filtered by an order number prefix.
> The internal Camel to AMQ connection is via the vm:// transport using
> org.apache.camel.component.activemq.ActiveMQComponent (but I have also tried
> a pooled JMS connection factory with the same results)
> When I connect a test non durable consumer from a Ruby script using STOMP, or
> NIO I see the same issue. Some messages appear to have a 0 sized body.
> I can connect an c++ open wire consumer from the same server and that
> instance gets all messages with no 0 size bodies.
> I have tried various versions of Camel and all exhibit the same results.
> It;'s also worth noting that the data sent to the splitter function reports
> no errors either.
> I have also tried some of the older STOPM GEM packages but no change. (Though
> I have found some odd connection issue when you upgrade to io-wait-0.4.0 from
> 0.3.1
>
> After much swapping things round and testing I've finally narrowed it down to
> some issue with the vm:// transport...
> I have swapped the internal Camel connection from using vm:// to tcp:// and
> for the last 24hrs have seen no client errors with 0 sized bodies.
> I don't have any way to debug this deeper but hopefully someone else will
> pick this up.
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