[jira] [Commented] (SOLR-11427) DELETEREPLICA with onlyIfDown specified should succeed if the host node is not present in the live_nodes Znode

["Varun Thacker (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188793#comment-16188793 ] 

Varun Thacker commented on SOLR-11427:
--------------------------------------

Hi Erick,

Do you know the original motivation of "onlyIdDown"  ? 

While deleting a replica we need to specify collection,shard and replica . So shouldn't the user know that he is deleting an active replica?

The scenario that you described totally happens . So to address that if we didn't have "onlyIfDown" in the first place then the command would try to delete the index , which would fail ( core is not present ) but atleast we would cleanup the state - which is what the user wants at this point ?

> DELETEREPLICA with onlyIfDown specified should succeed if the host node is not present in the live_nodes Znode
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11427
>                 URL: https://issues.apache.org/jira/browse/SOLR-11427
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>
> The title says it pretty much, so opening up for discussion:
> Here's the problem. Let's say a node is killed via {{kill -9}}. The state.json file still says it's "active", but the node is gone from live_nodes. If the node in question never comes back, the replica's state doesn't necessarily get switched to "down", so specifying onlyIfDown fails with "node is active" message. This is all documented more thoroughly in SOLR-9361.
> The question is whether it's sufficient and/or safe to succeed in deleting the replica from state.json if the state is "active" _and_ the node is NOT present in live_nodes.
> I'm assigning to myself, but others should feel free to take it.



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