[2018-08-31T15:03:37,206][INFO ][logstash.outputs.elasticsearch] Retrying individual bulk actions that failed or were rejected by the previous bulk request. {:count=>13}
[2018-08-31T15:03:38,322][INFO ][logstash.outputs.elasticsearch] retrying failed action with response code: 500 ({"type"=>"illegal_state_exception", "reason"=>"There are no external requests known to support wildcards that don't support replacing their indices"})
[2018-08-31T15:03:38,322][INFO ][logstash.outputs.elasticsearch] retrying failed action with response code: 500 ({"type"=>"illegal_state_exception", "reason"=>"There are no external requests known to support wildcards that don't support replacing their indices"})
[2018-08-31T15:03:38,322][INFO ][logstash.outputs.elasticsearch] retrying failed action with response code: 500 ({"type"=>"illegal_state_exception", "reason"=>"There are no external requests known to support wildcards that don't support replacing their indices"})
[2018-08-31T15:03:38,322][INFO ][logstash.outputs.elasticsearch] retrying failed action with response code: 500 ({"type"=>"illegal_state_exception", "reason"=>"There are no external requests known to support wildcards that don't support replacing their indices"})
[2018-08-31T15:03:38,322][INFO ][logstash.outputs.elasticsearch] retrying failed action with response code: 500 ({"type"=>"illegal_state_exception", "reason"=>"There are no external requests known to support wildcards that don't support replacing their indices"})
6.3版本elk运行一段时间logstash日志出现这些信息，logstash的events received rate骤降为0.怎么解决
