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Posted to dev@ignite.apache.org by "Artem Budnikov (JIRA)" <ji...@apache.org> on 2018/11/07 10:24:00 UTC

[jira] [Created] (IGNITE-10154) Critical worker liveness check configuration is non-trivial and inconsistent

Artem Budnikov created IGNITE-10154:
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             Summary: Critical worker liveness check configuration is non-trivial and inconsistent
                 Key: IGNITE-10154
                 URL: https://issues.apache.org/jira/browse/IGNITE-10154
             Project: Ignite
          Issue Type: Task
    Affects Versions: 2.7
            Reporter: Artem Budnikov
             Fix For: 2.7


The way the critical thread liveness check is configured has a number of usability issues.

1) By default, the liveness check is disabled (i.e. if no failure handler is specified in the configuration). However, if you specify any handler (including the default one), liveness check gets enabled (which is something the users may not want) unless you disable it explicitly.

2) Users that use Ignite 2.6 with a configured failure handler will get this check enabled after migrating to Ignite 2.7.

In the two cases above, the functionality changes in a non-trivial. Ideally, we need an option that enables this functionality explicitly. A possible example would be to keep liveness check disabled until the user sets the systemWorkerBlockedTimeout to a positive value. (Or the other way around: enable liveness check by default until the user explicitly disables it).



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