问个 mysql 问题

今天看 mysql 错误日志的时候，发现一大堆 Got an error reading communication packets
这是什么情况？ ?
2017-04-17T08:46:22.124271Z 311821948 [Note] Slave I/O thread for channel '*.*.*。*': connected to master 'replicate_user@*.*.*。*:3306',replication started in log 'mysql-bin.000021' at position 4
2017-04-17T08:46:22.144044Z 311821949 [Note] Slave SQL thread for channel '*.*.*。*' initialized, starting replication in log 'mysql-bin.000021' at position 4, relay log './bdwaf-relay-bin-121@002e201@002e120@002e4.000001' position: 4
2017-04-17T08:47:01.879641Z 311821997 [Note] Aborted connection 311821997 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:48:02.424673Z 311822076 [Note] Aborted connection 311822076 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:49:01.975956Z 311822154 [Note] Aborted connection 311822154 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:50:02.509953Z 311822232 [Note] Aborted connection 311822232 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:51:02.098265Z 311822310 [Note] Aborted connection 311822310 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:52:01.632265Z 311822386 [Note] Aborted connection 311822386 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:53:02.160977Z 311822466 [Note] Aborted connection 311822466 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:54:01.717055Z 311822543 [Note] Aborted connection 311822543 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)
2017-04-17T08:55:02.244433Z 311822623 [Note] Aborted connection 311822623 to db: 'logs' user: 'root' host: 'localhost' (Got an error reading communication packets)