[jira] [Updated] (SOLR-6685) ConcurrentModificationException in Overseer Stats API

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shalin Shekhar Mangar updated SOLR-6685:
----------------------------------------
    Attachment: SOLR-6685.patch

This patch changes the Stats map to be a ConcurrentHashMap and gets rid of the (inconsistent) synchronized blocks in the Stats methods. Synchronization is not required for iteration anymore. I found that failureDetails was being iterated without synchronization in OCP.getOverseerStatus.

> ConcurrentModificationException in Overseer Stats API
> -----------------------------------------------------
>
>                 Key: SOLR-6685
>                 URL: https://issues.apache.org/jira/browse/SOLR-6685
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 4.10.1
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 5.0, Trunk
>
>         Attachments: SOLR-6685.patch
>
>
> I just found a concurrent modification exception in OverseerCollectionProcessor while iterating over the overseer stats. The iteration should be synchronized.



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