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https://issues.apache.org/jira/browse/SOLR-11427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson resolved SOLR-11427.
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Resolution: Won't Fix
Thinking about this after letting it sit for a while, this is a really bad idea.
Nodes delete just fine if you don't specify onlyIfDown=true. The idea of saying
"DELETEREPLICA will respect the onlyIfDown flag even if the node is marked as
active if the host happens be absent" is:
1> confusing. Hey, I said onlyIfDown!
2> dangerous. Small programming or scripting errors and onlyIfDown isn't the
safety valve it was intended to be
3> unnecessary. In the scenario outlined where the node died horribly and even
if it's never coming back, leave off the onlyIfDown bit and the node will go
away.
In short, I see no utility here, and opportunities to have unpleasant things
happen so not worth the work.
> 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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