Your workers.properties file looks fine. This is really a very weird issue, because which type of connector (HTTP vs. AJP) you use shouldn’t make any difference. The Servlet API doesn’t even provide any way to distinguish between the two.
You wrote that the request takes a long time and finally you only see a blank page. You should try to do a thread dump to find out what is taking so long. And what HTTP response code is sent by the server when the blank page is showed?
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