This is the ES log. I was getting messages showing up in the web interface but this stopped at approximately 14:43
[2017-06-26T13:29:18,815][INFO ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][25] overhead, spent [434ms] collecting in the last [1.3s]
[2017-06-26T13:30:13,206][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][young][78][8] duration [1.6s], collections [1]/[2.3s], total [1.6s]/[2.5s], memory [155.7mb]->[125.3mb]/[1.9gb], all_pools {[young] [100.7mb]->[16.1mb]/[133.1mb]}{[survivor] [16.6mb]->[12.5mb]/[16.6mb]}{[old] [38.3mb]->[96.7mb]/[1.8gb]}
[2017-06-26T13:30:13,237][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][78] overhead, spent [1.6s] collecting in the last [2.3s]
[2017-06-26T13:32:28,480][INFO ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][young][213][9] duration [714ms], collections [1]/[1s], total [714ms]/[3.3s], memory [240.3mb]->[121.8mb]/[1.9gb], all_pools {[young] [131.1mb]->[1.1mb]/[133.1mb]}{[survivor] [12.5mb]->[7.9mb]/[16.6mb]}{[old] [96.7mb]->[112.7mb]/[1.8gb]}
[2017-06-26T13:32:28,480][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][213] overhead, spent [714ms] collecting in the last [1s]
[2017-06-26T13:52:15,724][INFO ][o.e.c.m.MetaDataCreateIndexService] [d_v_zrN] [graylog_15] creating index, cause [api], templates [graylog-internal], shards [4]/[0], mappings [message]
[2017-06-26T13:52:15,822][INFO ][o.e.c.r.a.AllocationService] [d_v_zrN] Cluster health status changed from [YELLOW] to [GREEN] (reason: [shards started [[graylog_15][1], [graylog_15][3], [graylog_15][2], [graylog_15][0]] ...]).
[2017-06-26T13:53:36,914][INFO ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][1479] overhead, spent [413ms] collecting in the last [1s]
[2017-06-26T14:47:06,560][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:21:36,098][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][young][6741][494] duration [9.1s], collections [1]/[9.8s], total [9.1s]/[19.7s], memory [183.2mb]->[158.1mb]/[1.9gb], all_pools {[young] [26.3mb]->[2.7mb]/[133.1mb]}{[survivor] [6.7mb]->[4.9mb]/[16.6mb]}{[old] [150.1mb]->[150.4mb]/[1.8gb]}
[2017-06-26T15:21:36,835][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][6741] overhead, spent [9.1s] collecting in the last [9.8s]
[2017-06-26T15:25:59,240][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][young][7003][670] duration [1.1s], collections [1]/[1.2s], total [1.1s]/[23.3s], memory [277.3mb]->[176.6mb]/[1.9gb], all_pools {[young] [100.8mb]->[34kb]/[133.1mb]}{[survivor] [2.6mb]->[1.9mb]/[16.6mb]}{[old] [173.8mb]->[174.7mb]/[1.8gb]}
[2017-06-26T15:25:59,242][WARN ][o.e.m.j.JvmGcMonitorService] [d_v_zrN] [gc][7003] overhead, spent [1.1s] collecting in the last [1.2s]
[2017-06-26T15:40:49,462][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:49,567][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:49,648][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:51,505][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:51,596][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:53,428][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
[2017-06-26T15:40:55,398][INFO ][o.e.c.m.MetaDataMappingService] [d_v_zrN] [graylog_15/VcUxherFTM6xQzqE4SEOPg] update_mapping [message]
The Graylog Log file shows:
2017-06-26T14:43:11.933+01:00 WARN [AbstractNioSelector] Failed to initialize an accepted socket.
java.io.IOException: overrun, bytes = 612
I was receiving this type of error for about ten minutes prior to logs not being visible and these types of error continued for about ten minutes after.
G