使用 默认值时，报错如下，实际上kafka是正常的
[2023/03/17 18:35:56.416 +08:00] [ERROR] [syncer.go:488] [“Failed to close syncer”] [error=“fail to push msg to kafka after 30s, check if kafka is up and working”] [errorVerbose=“fail to push msg to kafka after 30s, check if kafka is up and working\ngithub.com/pingcap/tidb-binlog/drainer/sync.(*KafkaSyncer).run\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/sync/kafka.go:236\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1371”]
[2023/03/17 18:36:06.417 +08:00] [ERROR] [util.go:62] [“Recovered from panic”] [err=“"Waiting too long for Syncer.run to quit."”] [“real stack”=“github.com/pingcap/tidb-binlog/drainer.(*taskGroup).start.func1.1\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/util.go:64\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:965\ngithub.com/pingcap/tidb-binlog/drainer.(*Syncer).run\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/syncer.go:494\ngithub.com/pingcap/tidb-binlog/drainer.(*Syncer).Start\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/syncer.go:133\ngithub.com/pingcap/tidb-binlog/drainer.(*Server).Start.func4\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/server.go:290\ngithub.com/pingcap/tidb-binlog/drainer.(*taskGroup).start.func1\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb-binlog/drainer/util.go:72”] [name=syncer]