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https://issues.apache.org/jira/browse/SOLR-8804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Thacker updated SOLR-8804:
--------------------------------
Attachment: SOLR-8804.patch
Thanks Shalin for the review! Updated patch taking into account your suggestions
> Race condition in ClusterStatus.getClusterStatus
> ------------------------------------------------
>
> Key: SOLR-8804
> URL: https://issues.apache.org/jira/browse/SOLR-8804
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 5.3.1
> Reporter: Alexey Serba
> Assignee: Varun Thacker
> Priority: Trivial
> Attachments: SOLR-8804.patch, SOLR-8804.patch
>
>
> Reading cluster state information using {{/collections?action=CLUSTERSTATUS}}
> can fail if there's a concurrent {{/collections?action=DELETE}} operation.
> The code in {{ClusterStatus.getClusterStatus}}
> # gets collection names
> # for every collection reads its cluster state info using
> {{ClusterState.getCollection}}
> The problem is that if there's a {{DELETE}} operation in between then
> {{ClusterState.getCollection}} can fail thus causing the whole operation to
> fail. It seems that it would be better to call
> {{ClusterState.getCollectionOrNull}} and skip/ignore that collection if the
> result is null.
> {noformat}
> 19:49:32.479 [qtp1531448569-881] ERROR org.apache.solr.core.SolrCore -
> org.apache.solr.common.SolrException: Could not find collection : collection
> at
> org.apache.solr.common.cloud.ClusterState.getCollection(ClusterState.java:165)
> at
> org.apache.solr.handler.admin.ClusterStatus.getClusterStatus(ClusterStatus.java:110)
> at
> org.apache.solr.handler.admin.CollectionsHandler$CollectionOperation$19.call(CollectionsHandler.java:614)
> at
> org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:166)
> {noformat}
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