[jira] [Commented] (SOLR-300) create subclass of SingleInstanceLockFactory which warns loadly in the event of concurrent lock attempts

["Alexandre Rafalovitch (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15551769#comment-15551769 ] 

Alexandre Rafalovitch commented on SOLR-300:
--------------------------------------------

Is this still relevant with simple type being no longer the default? Also, I thought there was a lot of lock-related work done in 6.x.

> create subclass of SingleInstanceLockFactory which warns loadly in the event of concurrent lock attempts
> --------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-300
>                 URL: https://issues.apache.org/jira/browse/SOLR-300
>             Project: Solr
>          Issue Type: Wish
>          Components: update
>            Reporter: Hoss Man
>            Priority: Minor
>
> as noted by yonik in SOLR-240...
> How about SingleInstanceLockFactory to aid in catching concurrency bugs?
>   ...
> or even better, a subclass or other implementation: SingleInstanceWarnLockFactory or SingleInstanceCoordinatedLockFactory that log a failure if obtain() is called for a lock that is already locked.
> we should create a new subclass like Yonik describes and change SolrIndexWriter to use this subclass if/when "single" is specified as the lockType.



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