为提高效率，提问时请尽量提供详细背景信息，问题描述清晰可优先响应。以下信息点请尽量提供：
- 【系统版本 & kernel 版本】7.6
- 【TiDB 版本】3.5
**
最近经常出现下图的错误，重启task没用，每次都需要重启dm服务，帮忙看下什么原因？
**
你好： 请问dm版本是什么，请上传发生问题时，完整的query-status结果，上传dm日志和tidb日志，多谢
版本v1.0.0-10-geb2889c9 (1.0 GA)
DM服务重新后恢复正常，最近这个错误比较频繁
“msg”: “[code=30014:class=relay-unit:scope=upstream:level=high] start reader for UUID 5bea217f-7cf3-11e9-be75-7cd30ae0f2c4.000001: start sync from GTID set 5bea217f-7cf3-11e9-be75-7cd30ae0f2c4:1-50749404,5befd796-7cf3-11e9-b859-7cd30ab8a80a:1-13052: dial tcp: i/o timeout
github.com/pingcap/dm/pkg/terror.(*Error).Delegate
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/pkg/terror/terror.go:267
github.com/pingcap/dm/pkg/binlog/reader.(*TCPReader).StartSyncByGTID
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/pkg/binlog/reader/tcp.go:102
github.com/pingcap/dm/relay/reader.(*reader).setUpReaderByGTID
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/relay/reader/reader.go:160
github.com/pingcap/dm/relay/reader.(*reader).Start
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/relay/reader/reader.go:109
github.com/pingcap/dm/relay.(*Relay).setUpReader
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/relay/relay.go:586
github.com/pingcap/dm/relay.(*Relay).process
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/relay/relay.go:304
github.com/pingcap/dm/relay.(*Relay).Process
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/relay/relay.go:191
github.com/pingcap/dm/dm/worker.(*realRelayHolder).run
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/dm/worker/relay.go:165
github.com/pingcap/dm/dm/worker.(*realRelayHolder).Start.func1
/home/jenkins/workspace/build_dm_master/go/src/github.com/pingcap/dm/dm/worker/relay.go:141
runtime.goexit
/usr/local/go/src/runtime/asm_amd64.s:1337”
这样截取的信息不是很完整，请将需要的所有信息完整反馈，多谢