使用kibana进行写入elasticsearch，报了一个错，麻烦大佬们给看看

[weixin_38051760]

{ "error": { "root_cause": [ { "type": "translog_exception", "reason": "Failed to write operation [NoOp{seqNo=0, primaryTerm=4, reason='null'}]", "index_uuid": "iH5U4UVsRuetHq2wDragng", "shard": "1", "index": "stu" } ], "type": "translog_exception", "reason": "Failed to write operation [NoOp{seqNo=0, primaryTerm=4, reason='null'}]", "index_uuid": "iH5U4UVsRuetHq2wDragng", "shard": "1", "index": "stu", "caused_by": { "type": "null_pointer_exception", "reason": null } }, "status": 500 }