Collector [job_stats] failed to collect data

I got following error after upgrade elasticsearch to 6.5 Could you please let me know reason fix for this issue?

[2018-11-26T17:43:21,964][DEBUG][o.e.a.s.TransportSearchAction] [] All shards failed for phase: [query]
[2018-11-26T17:43:21,965][ERROR][o.e.x.m.c.m.JobStatsCollector] [] collector [job_stats] failed to collect data

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