nothing...
[2017-06-06T20:20:00,570][INFO ][o.e.c.m.MetaDataCreateIndexService] [es-01] [logstash-task-521874-20170531] creating index, cause [auto(bulk api)], templates [logstash], shards [1]/[1], mappings [_default_]
[2017-06-06T20:20:00,786][INFO ][o.e.c.r.a.AllocationService] [es-01] Cluster health status changed from [YELLOW] to [GREEN] (reason: [shards started [[logstash-task-521874-20170531][0]] ...]).
[2017-06-06T20:20:01,415][INFO ][o.e.c.m.MetaDataMappingService] [es-01] [logstash-task-521874-20170531/ekwOc4OsRXucCaCjChod7g] create_mapping [logs]