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From peterjca <>
Subject Re: Tomcat appears to be sending duplicate requests
Date Fri, 08 Jul 2011 20:49:08 GMT

>Now you just need a test harness for your test harness. :)

Ad infinitum!

It's not strictly a bug in the harness. The test harness implements one
correct scenario for a concurrent "thrashing". It uses the Jersey client API
to post requests, by constructing a new client each time. The only state
maintained by the harness are atomic counts for the debugging I've been
doing. The only states passed within the harness are either Strings or
immutable collections of name/value pairs. There is no session state
maintained on the server as each request is context complete.

With both end-point Jersey resources in operation (each with completely
distinct URLs), one resource gets fed duplicates of requests it has already
received, the other resource (which I haven't audited) certainly gets some
(if not all) of its requests (as it it solely responsible for persisting a
specific type of data to the database). It's all rather bizarre and points
to a thread-safety issue with the client. Either a bug or I'm using it
incorrectly (though not according to the docs I've read).

The Jersey client can have Apache's HttpClient 3 plugged in which may be
worth a shot. There's an experimental extension for HttpClient 4. At any
rate, I need to gather more info to pass on to the Jersey folks. Best
download the Jersey source. Sorry if I've disturbed you here!

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