https://issues.apache.org/bugzilla/show_bug.cgi?id=55546

            Bug ID: 55546
           Summary: Connection hangs after Websocket upgrade through
                    Apache AJP reverse proxy
           Product: Tomcat 7
           Version: 7.0.42
          Hardware: PC
                OS: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Connectors
          Assignee: dev@tomcat.apache.org
          Reporter: arc...@dellroad.org

I've encountered a hang when using a Vaadin application connecting to Apache
which in turn reverse proxies to Tomcat via the AJP connector and Websockets
are used. The bug does not occur when connecting to Tomcat directly.

I originally filed a bug with Vaadin: http://dev.vaadin.com/ticket/12435

According to their analysis, the bug is not a Vaadin bug but either an Apache
or Tomcat bug.

Please see that bug for details and a WAR file that demonstrates the problem.
To reproduce the problem, it was necessary for me to set up an Apache reverse
proxy like this:

  <LocationMatch "/demo3/">
    ProxyPass         ajp://127.0.0.1:8009/demo3/
    ProxyPassReverse  ajp://127.0.0.1:8009/demo3/
  </LocationMatch>

and then connect to the Tomcat application indirectly via Apache.

Due to the numerous moving parts and my incomplete understanding of them all,
I'll apologize in advance if this bug report is invalid.

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