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From "Dmitry Karachentsev (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-4395) Implement communication backpressure per policy - SYSTEM or PUBLIC
Date Thu, 06 Apr 2017 11:27:41 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-4395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Dmitry Karachentsev updated IGNITE-4395:
    Fix Version/s:     (was: 2.0)

> 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
>            Assignee: Dmitry Karachentsev
>             Fix For: 2.1
> 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.
> [PR#1331|https://github.com/apache/ignite/pull/1331] with test that leads to grid hang.

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