TIDB 3.0.12， 突然告警drainer端口没有运行，目前暂时没有用到drainer
[2020/11/25 20:30:34.788 +08:00] [INFO] [async_producer.go:727] ["[sarama] producer/broker/0 state change to [open] on kafka_obinlog/0\
"]
[2020/11/25 20:30:34.788 +08:00] [INFO] [broker.go:212] ["[sarama] Connected to broker at 172.30.0.298:9092 (registered as #0)\
"]
[2020/11/25 20:30:34.897 +08:00] [FATAL] [kafka.go:218] [“fail to produce message to kafka, please check the state of kafka server”] [error=“kafka: Failed to produce message to topic kafka_obinlog: kafka server: Message was too large, server rejected it to avoid allocation error.”] [stack=“github.com/pingcap/log.Fatal\
\t/home/jenkins/agent/workspace/release_tidb_3.0/go/pkg/mod/github.com/pingcap/log@v0.0.0-20190715063458-479153f07ebd/global.go:59\
github.com/pingcap/tidb-binlog/drainer/sync.(*KafkaSyncer).run.func2\
\t/home/jenkins/agent/workspace/release_tidb_3.0/go/src/github.com/pingcap/tidb-binlog/drainer/sync/kafka.go:218”]