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From "Dmitry Karachentsev (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-4395) Implement communication backpressure per policy - SYSTEM or PUBLIC
Date Thu, 08 Dec 2016 07:30:00 GMT
Dmitry Karachentsev created IGNITE-4395:
-------------------------------------------

             Summary: Implement communication backpressure per policy - SYSTEM or PUBLIC
                 Key: IGNITE-4395
                 URL: https://issues.apache.org/jira/browse/IGNITE-4395
             Project: Ignite
          Issue Type: Improvement
          Components: cache, compute
    Affects Versions: 1.7
            Reporter: Dmitry Karachentsev


1) Start two data nodes with some cache.
2) From one node in async mode post some big number of jobs to another. That jobs do some
cache operations.
3) Grid hangs almost immediately and all threads are sleeping except public ones, they are
waiting for response.

This happens because all cache and job messages are queued on communication and limited with
default number (1024). It looks like jobs are waiting for cache responses that could not be
received due to this limit.

Proper solution here is to have communication backpressure per policy -
SYSTEM or PUBLIC, but not single point as it is now. It could be achieved
with having two queues per communication session or (which looks a bit
easier to implement) to have separate connections.



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