Low Description
Under certain conditions, the search plugin can create duplicate scheduled jobs for its Elasticsearch health checks, which can result in those checks running many times. For example:
2017-08-07 04:11:27,717 INFO [Caesium-1-1] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:11:27,766 INFO [I/O dispatcher 981] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:11:27,798 INFO [Caesium-1-1] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H 2017-08-07 04:20:09,768 INFO [Caesium-1-1] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:20:09,788 INFO [I/O dispatcher 991] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:20:09,814 INFO [Caesium-1-1] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H 2017-08-07 04:31:13,753 ERROR [AtlassianEvent::thread-6] c.a.s.p.m.i.MergeRequestMergeCheck Issue encountered in the "check for veto" of Unbreakable Build. Exception is:java.lang.NullPointerException 2017-08-07 04:35:36,052 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:35:36,092 INFO [I/O dispatcher 1001] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:35:36,135 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H 2017-08-07 04:42:10,161 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:42:10,175 INFO [I/O dispatcher 1011] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:42:10,196 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H 2017-08-07 04:43:09,089 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:43:09,129 INFO [I/O dispatcher 1021] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:43:09,152 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H 2017-08-07 04:55:57,195 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Running up to 2 search health checks 2017-08-07 04:55:57,215 INFO [I/O dispatcher 1031] c.a.b.s.s.t.DefaultElasticsearchConnectionTester Connected to Elasticsearch version 2.3.4 2017-08-07 04:55:57,241 INFO [Caesium-1-2] c.a.b.s.j.c.i.HealthCheckRunner Health checks will run again after PT12H
The messages indicate the checks are running 12 hours (PT12H) apart, but the timestamps show they're actually happening every ~10 minutes or so.