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Posted to dev@lucene.apache.org by "Shalin Shekhar Mangar (JIRA)" <ji...@apache.org> on 2018/03/09 23:03:00 UTC

[jira] [Commented] (SOLR-12067) AutoAddReplicas default 30 second wait time is too low

    [ https://issues.apache.org/jira/browse/SOLR-12067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16393730#comment-16393730 ] 

Shalin Shekhar Mangar commented on SOLR-12067:
----------------------------------------------

Thanks Varun. I agree 30 seconds is less. Actually, I found that with HDFS the timeout was autoReplicaFailoverBadNodeExpiration (default 60s) + autoReplicaFailoverWaitAfterExpiration (default 30s). We deprecated autoReplicaFailoverBadNodeExpiration value but did not add it to the default autoReplicaFailoverWaitAfterExpiration. So the timeout should be 90 seconds at least. I think we should be conservative here and set this to a higher value, say 120s.

> AutoAddReplicas default 30 second wait time is too low
> ------------------------------------------------------
>
>                 Key: SOLR-12067
>                 URL: https://issues.apache.org/jira/browse/SOLR-12067
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Varun Thacker
>            Assignee: Shalin Shekhar Mangar
>            Priority: Major
>
> If I create a collection with autoAddReplicas=true in Solr 7.x a AutoAddReplicasPlanAction get's created with a waitFor=30 seconds
> The default should be increased as a JVM which is down for more than 30seconds can cause the framework to add a new replica on another node
> With HDFS this was a cheap operation as it only involved create a core and pointing it to the same index directory. 
> But for non shared file systems, this is a very expensive operation and can potentially move large indexes around so maybe we should have a higher default



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