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From "Varun Thacker (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SOLR-12544) ZkStateReader can cache deleted collections and never refresh it
Date Tue, 08 Jan 2019 19:15:00 GMT

     [ https://issues.apache.org/jira/browse/SOLR-12544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Varun Thacker resolved SOLR-12544.
----------------------------------
    Resolution: Fixed

I don't think so?I believe the user upgraded to a more recent version and didn't run into
this.

> ZkStateReader can cache deleted collections and never refresh it
> ----------------------------------------------------------------
>
>                 Key: SOLR-12544
>                 URL: https://issues.apache.org/jira/browse/SOLR-12544
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 7.2.1
>            Reporter: Varun Thacker
>            Priority: Major
>
> After a delete collection call, CLUSTERSTATUS starts breaking with this error permanently
with this error 
> {code:java}
> org.apache.solr.common.SolrException: Error loading config name for collection my_collection
>     at org.apache.solr.common.cloud.ZkStateReader.readConfigName(ZkStateReader.java:198)
>     at org.apache.solr.handler.admin.ClusterStatus.getClusterStatus(ClusterStatus.java:141)
> ...
> Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /collections/my_collection
> ...{code}
> SOLR-10720 addresses the problem by skipping over the collection as it was aimed to
fix the  race condition between delete collection and CLUSTERSTATUS being called.
>  
> The fact that we see the error never go away , means there is another bug lingering which
will make the state never refresh and thus other calls list LIST will always show the collection. 
>  
> This happened with Solr 7.2.1 and doesn't happen very often. But when it does the only
solution is to restart the node. 



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