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From "Pavel Voronkin (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (IGNITE-7648) Fix IGNITE_ENABLE_FORCIBLE_NODE_KILL system property.
Date Fri, 08 Feb 2019 12:49:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16763556#comment-16763556
] 

Pavel Voronkin edited comment on IGNITE-7648 at 2/8/19 12:48 PM:
-----------------------------------------------------------------

We changed behaviour of ENABLED_FORCIBLE_NODE_KILL=true in this ticket.

Only server node can kill client node in case if property is enabled.

client can't kill server, server can't kill server.

Timeout logic changed in case of failure detection enabled scenario

We start connect and hanshake from timeout 500ms. If failed we increase timeout using exponential
backoff strategy

timeout = Math.min(Math.min(timeout * 2, maxTimeout), remainingTiimeTillFailureDetection)

 


was (Author: voropava):
We changed behaviour of ENABLED_FORCIBLE_NODE_KILL=true in this ticket.

Only server node can kill client node in case if property is enabled.

client can't kill server, server can't kill server.

Timeout logic changed in case of failure detection enabled scenario

We start connect and hanshake from timeout 500ms. If failed we increase timeout using exponential
backoff strategy

timeout = Math.min(Math.min(timeout * 2, maxTimeout), remainingTiimeTillFailureDetection)

 

 

 

 

 

 

> Fix IGNITE_ENABLE_FORCIBLE_NODE_KILL system property.
> -----------------------------------------------------
>
>                 Key: IGNITE-7648
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7648
>             Project: Ignite
>          Issue Type: Improvement
>    Affects Versions: 2.3
>            Reporter: Alexei Scherbakov
>            Assignee: Pavel Voronkin
>            Priority: Major
>             Fix For: 2.8
>
>
> IGNITE_ENABLE_FORCIBLE_NODE_KILL system property was introduced in IGNITE-5718 as a way
to prevent unnecessary node drops in case of short network problems.
> I suppose it's wrong decision to fix it in such way.
> We had faced some issues in our production due to lack of automatic kicking of ill-behaving
nodes (on example, hanging due to long GC pauses) until we realised the necessity of changing
default behavior via property.
> Right solution is to kick nodes only if failure threshold is reached. Such behavior
should be always enabled.
> UPDATE: During a discussion it was decided what the property will remain disabled by
default.
>  



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