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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: [DISCUSSION] Urgent Ignite bug fix release
Date Fri, 25 Aug 2017 00:31:59 GMT
+1 on the release, let's do it ASAP.

On Thu, Aug 24, 2017 at 12:32 PM, Denis Magda <dmagda@apache.org> wrote:

> Igniters,
>
> Presently every Apache Ignite node requests 80% of RAM from an operating
> system. We debated a lot about this default [1] and as a practice shows
> those who voted for the lower value (20%-25%) were right.
>
> Our users started reporting about bizarre issues ([2], [3], [4]) when a
> cluster hangs, freezes for a while or even crashes during standard
> preloading phase or minor workloads.
>
> It’s turned out to be that lack of RAM causes extensive swapping and
> checkpointing activity. Even more, the issue can be reproduced on your
> laptop if you launch a couple of nodes and start data preloading.
>
> All this can be avoided if you allocated less than 80% and tune the
> checkpointing if the persistence is used. Unfortunately, only few could get
> to this point, the rest would kick Ignite out from their deployments.
>
> Thus, we have to fix the defaults ([5] and [6]) on our own and release an
> emergency release with the fixes as soon as possible.
>
> Any objections or other thoughts?
>
> [1] http://apache-ignite-developers.2346864.n4.nabble.
> com/IGNITE-5717-improvements-of-MemoryPolicy-default-size-td20264.html
> [2] http://apache-ignite-users.70518.x6.nabble.com/
> Performance-of-persistent-store-too-low-when-bulb-
> loading-tp16247p16337.html
> [3] http://apache-ignite-users.70518.x6.nabble.com/Strange-
> problems-with-Ignite-native-Persistence-when-Data-exceeds-
> Memory-td16187.html#a16194
> [4] http://apache-ignite-users.70518.x6.nabble.com/
> Activation-slow-and-Ignite-node-crashed-in-the-middle-of-
> checkpoint-td16144.html
>
> [5] https://issues.apache.org/jira/browse/IGNITE-6003
> [6] https://issues.apache.org/jira/browse/IGNITE-6182
>
> —
> Denis

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