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https://issues.apache.org/jira/browse/SOLR-12456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16503746#comment-16503746
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Shalin Shekhar Mangar commented on SOLR-12456:
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Thanks Jan. There are a bunch of autoscaling tests which explicitly enable
DEBUG logging for these classes. So please change that level to trace so we
continue to have relevant information while debugging test failures.
> Move some OverseerTaskProcessor and NodeLostTrigger logging to TRACE
> --------------------------------------------------------------------
>
> Key: SOLR-12456
> URL: https://issues.apache.org/jira/browse/SOLR-12456
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: logging
> Reporter: Jan Høydahl
> Priority: Major
>
> When running Solr on DEBUG level logging (bin/solr start -c -v -f) there are
> some *very* chatty classes spitting out meaningless log lines every second.
> This typically looks like
> {noformat}
> 2018-06-06 14:36:59.486 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor Got 0 tasks from work-queue : [[]]
> 2018-06-06 14:36:59.487 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor Cleaning up work-queue. #Running tasks: 0
> 2018-06-06 14:36:59.487 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor RunningTasks: []
> 2018-06-06 14:36:59.487 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor BlockedTasks: []
> 2018-06-06 14:36:59.488 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor CompletedTasks: []
> 2018-06-06 14:36:59.488 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor RunningZKTasks: []
> 2018-06-06 14:36:59.488 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskQueue Peeking for top 100 elements. ExcludeSet: []
> 2018-06-06 14:36:59.574 DEBUG (ScheduledTrigger-7-thread-3) [ ]
> o.a.s.c.a.NodeLostTrigger Running NodeLostTrigger: .auto_add_replicas with
> currently live nodes: 1
> 2018-06-06 14:37:00.575 DEBUG (ScheduledTrigger-7-thread-1) [ ]
> o.a.s.c.a.NodeLostTrigger Running NodeLostTrigger: .auto_add_replicas with
> currently live nodes: 1
> 2018-06-06 14:37:01.493 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor Got 0 tasks from work-queue : [[]]
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor Cleaning up work-queue. #Running tasks: 0
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor RunningTasks: []
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor BlockedTasks: []
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor CompletedTasks: []
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskProcessor RunningZKTasks: []
> 2018-06-06 14:37:01.494 DEBUG
> (OverseerCollectionConfigSetProcessor-72072338763677696-192.168.127.248:8983_solr-n_0000000001)
> [ ] o.a.s.c.OverseerTaskQueue Peeking for top 100 elements. ExcludeSet: []
> 2018-06-06 14:37:01.577 DEBUG (ScheduledTrigger-7-thread-3) [ ]
> o.a.s.c.a.NodeLostTrigger Running NodeLostTrigger: .auto_add_replicas with
> currently live nodes: 1
> 2018-06-06 14:37:02.577 DEBUG (ScheduledTrigger-7-thread-1) [ ]
> o.a.s.c.a.NodeLostTrigger Running NodeLostTrigger: .auto_add_replicas with
> currently live nodes: 1
> 2018-0{noformat}
> These spam the log making it harder to spot important stuff.
> I propose to make these conditional and log on TRACE level (or not at all) if
> there is nothing to report, and on DEBUG level if there e.g. actually are
> tasks on the overseer queue.
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