为提高效率，请提供以下信息，问题描述清晰能够更快得到解决：
【TiDB 版本】tidb_version(): Release Version: v4.0.12
tidb_version(): Release Version: v4.0.12
Edition: Community
Git Commit Hash: 11a9254bec522c1991033a6098f6dccadc6eb7c1
Git Branch: heads/refs/tags/v4.0.12
UTC Build Time: 2021-04-02 03:23:24
GoVersion: go1.13
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false
Starting component dm: display dm-test
Cluster type: dm
Cluster name: dm-test
Cluster version: v2.0.1
【问题描述】
对版本进行了升级，从V4.0.0升级到V4.0.12，之前任务同步没有问题，现在升级后需要重新同步数据
报错信息：
tiup dmctl --master-addr=172.16.24.79:8261 operate-source create /home/tidb/.tiup/components/dmctl/v2.0.1/dmctl/conf/source1.yaml
Starting component dmctl: --master-addr=172.16.24.79:8261 operate-source create /home/tidb/.tiup/components/dmctl/v2.0.1/dmctl/conf/source1.yaml
[code=48001:class=dmctl:scope=internal:level=high], Message: can’t connect to 172.16.24.79:8261, RawCause: context deadline exceeded, Workaround: Please check your network connection.
Error: run `` (wd:/home/tidb/.tiup/data/STys81H) failed: exit status 2
端口正常，集群状态正常
telnet 172.16.24.79 8261
Trying 172.16.24.79…
Connected to 172.16.24.79.
Escape character is ‘^]’.
tiup dm display dm-test
Starting component dm: display dm-test
Cluster type: dm
Cluster name: dm-test
Cluster version: v2.0.1
SSH type: builtin
ID Role Host Ports OS/Arch Status Data Dir Deploy Dir
172.16.24.79:9093 alertmanager 172.16.24.79 9093/9094 linux/x86_64 Up /home/tidb/dm/data/alertmanager-9093 /home/tidb/dm/deploy/alertmanager-9093
172.16.24.79:8261 dm-master 172.16.24.79 8261/8291 linux/x86_64 Healthy|L /home/tidb/dm/data/dm-master-8261 /home/tidb/dm/deploy/dm-master-8261
172.16.24.80:8261 dm-master 172.16.24.80 8261/8291 linux/x86_64 Healthy /home/tidb/dm/data/dm-master-8261 /home/tidb/dm/deploy/dm-master-8261
172.16.24.81:8261 dm-master 172.16.24.81 8261/8291 linux/x86_64 Healthy /home/tidb/dm/data/dm-master-8261 /home/tidb/dm/deploy/dm-master-8261
172.16.24.79:8262 dm-worker 172.16.24.79 8262 linux/x86_64 Free /data/tidb/dm/data/dm-worker-8262 /data/tidb/dm/deploy/dm-worker-8262
172.16.24.80:8262 dm-worker 172.16.24.80 8262 linux/x86_64 Free /home/tidb/dm/data/dm-worker-8262 /home/tidb/dm/deploy/dm-worker-8262
172.16.24.81:8262 dm-worker 172.16.24.81 8262 linux/x86_64 Free /home/tidb/dm/data/dm-worker-8262 /home/tidb/dm/deploy/dm-worker-8262
172.16.24.79:3000 grafana 172.16.24.79 3000 linux/x86_64 Up - /home/tidb/dm/deploy/grafana-3000
172.16.24.79:9090 prometheus 172.16.24.79 9090 linux/x86_64 Up /home/tidb/dm/data/prometheus-9090 /home/tidb/dm/deploy/prometheus-9090
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