We upgraded our instances to 6.3 last week, and today our elastic instances took a dive. Here are the output from the logs on 1 of the nodes. We have disabled monitoring and restarted and things are starting to collect again.
Any ideas on what could be off? Please let me know if you would like any more debug information?
[2018-06-29T10:35:35,542][WARN ][o.e.x.m.e.l.LocalExporter] unexpected error while indexing monitoring document
org.elasticsearch.xpack.monitoring.exporter.ExportException: RemoteTransportException[[stats-dny4i1stc02-5][10.6.3.42:9008][indices:data/write/bulk[s]]]; nested: RemoteTransportException[[stats-dny4i1stc02-5][10.6.3.42:9008][indices:data/write/bulk[s][p]]]; nested: EsRejectedExecutionException[rejected execution of org.elasticsearch.transport.TransportService$7@2b51d373 on EsThreadPoolExecutor[name = stats-dny4i1stc02-5/write, queue capacity = 200, org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor@3bb2232e[Running, pool size = 36, active threads = 36, queued tasks = 200, completed tasks = 14140094]]];
at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.lambda$throwExportException$2(LocalBulk.java:128) ~[?:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_66]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_66]
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:1.8.0_66]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[?:1.8.0_66]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[?:1.8.0_66]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:1.8.0_66]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:1.8.0_66]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_66]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[?:1.8.0_66]