[jira] [Updated] (SOLR-12544) ZkStateReader can cache deleted collections and never refresh it

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[jira] [Updated] (SOLR-12544) ZkStateReader can cache deleted collections and never refresh it

Tim Allison (Jira)

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

Varun Thacker updated SOLR-12544:
    Attachment:     (was: SOLR-12544_Solr721.patch)

> 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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