If you are experiencing failed requests on your long-running /
requests, consider performing some kind of "pre-warming" procedure of
your own... If you are getting timeout errors, Ping a do-nothing url,
and wait for it to return before running the big job. If it's a big
job, users should expect to wait anyway {and you should tell them they
are waiting!}, so the ping ensures {almost} that a warm JVM is running
in the server nearest said users, and then the big /request can
{usually} avoid getting killed with extra spin up time. Very unlucky
users would get a /ping on an old JVM, and /request a new one, but...
Technology isn't perfect... YET!
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