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From "James A. Robinson" <>
Subject Question re Jetty and ActiveMQ 5.13.0 async support
Date Wed, 10 Feb 2016 20:47:54 GMT
I'm working on upgrading from activemq 5.11.0 to 5.13.0.  When I make an
HTTP GET request against the older version of the service, when the queue
doesn't have any pending messages, the request hangs until one is ready.
On the newer version it returns a fatal status 500 error and throws an

Server Error
Caused by: java.lang.IllegalStateException: !asyncSupported
at org.eclipse.jetty.server.Request.startAsync(

It appears that the newer versions of Jetty don't explicitly enable async.
Changing webapps/api/WEB-INF/web.xml to add
<async-supported>true</async-supported> appeared to resolve the issue, but
I'm wondering why that wasn't defined in the first place?  Is there is some
other configuration that ought to have been toggled to prevent the error?


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