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https://issues.apache.org/jira/browse/AMQ-6981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16497078#comment-16497078
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Christopher L. Shannon commented on AMQ-6981:
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Seems to be related to https://issues.apache.org/jira/browse/AMQ-5857
Specifically, this commit:
https://git-wip-us.apache.org/repos/asf?p=activemq.git;a=blobdiff;f=activemq-client/src/main/java/org/apache/activemq/command/ActiveMQTextMessage.java;h=cca09be21bfb877213a4a506415929f1f81a1902;hp=347db78da559bf57b049574c96cd3a8e08681dae;hb=84ec047;hpb=de86f473f776fe3a8ca32d7f929ecec7993c458b
> ActiveMQText message can return null when using VMTransport
> -----------------------------------------------------------
>
> Key: AMQ-6981
> URL: https://issues.apache.org/jira/browse/AMQ-6981
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker, JMS client
> Affects Versions: 5.15.4
> Reporter: Christopher L. Shannon
> Priority: Major
>
> The issue seems to involve using the VMTransport, however it's possible it
> could be something else because the NIO transport is also used in the test
> case.
> The original bug report is here:
> [http://mail-archives.apache.org/mod_mbox/activemq-dev/201805.mbox/%3C1527716475007-0.post%40n4.nabble.com%3E]
> Test Report is here:
> [https://github.com/CodeMettle/amq_null_body_repro]
> Originally I thought this had to do with concurrently accessing getText() on
> a message but the VM transport should copy the message to each consumer
> before dispatch so something else seems to be going on.
> It's possible that there's something specific to the test case (ie a bug in
> the client code) or an issue in the broker that causes the null message body
> but this needs to be looked at closer to determine the problem.
> Also, as a side note, there is no specific synchronization in the client
> message objects as they are supposed to be used in a single thread which is
> why they are copied on dispatch if using the VM transport.
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