[jira] [Updated] (SOLR-12652) SolrMetricManager.overridableRegistryName should be removed; it doesn't work

["Peter Somogyi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-12652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Somogyi updated SOLR-12652:
---------------------------------
    Attachment: SOLR-12652.patch

> SolrMetricManager.overridableRegistryName should be removed; it doesn't work
> ----------------------------------------------------------------------------
>
>                 Key: SOLR-12652
>                 URL: https://issues.apache.org/jira/browse/SOLR-12652
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: metrics
>    Affects Versions: 7.1
>            Reporter: David Smiley
>            Priority: Minor
>         Attachments: SOLR-12652.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> The {{SolrMetricManager.overridableRegistryName()}} method is a great idea but unfortunately in practice I've found it doesn't really work; it seems fundamentally flawed.  +I wish it could work+.  The main issue I think is that the callers of SMM.registerGauge/registerMetric assumes it can place a gauge/metric and have it be the only once there (force==true).  But it won't be if it's shared.  
> Another problem is in at least one of the reporters -- {{JmxMetricsReporter.JmxListener#registerMBean}} will get in a race condition to remove an already-registered MBean but in the process of removing it, it'll already get removed concurrently by some other core working on the same name.  This results in {{javax.management.InstanceNotFoundException}} logged as a warning; nothing serious.  But I suspect conceptually there is a problem since which MBean should "win"?  Shrug.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org