为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
- 【TiDB 版本】：v2.0.0
- 【问题描述】：就执行了stop-task，再次start-task，就报错如下信息：
[root@tidb_dm_master1 tidb]# tiup dmctl --master-addr 192.168.103.33:8261 start-task /home/tidb/test_task.yaml
Starting component dmctl: /root/.tiup/components/dmctl/v2.0.0/dmctl/dmctl --master-addr 192.168.103.33:8261 start-task /home/tidb/test_task.yaml
{
“result”: true,
“msg”: “”,
“sources”: [
{
“result”: false,
“msg”: “[code=38032:class=dm-master:scope=internal:level=high], Message: some error occurs in dm-worker: ErrCode:10001 ErrClass:“database” ErrScope:“downstream”
ErrLevel:“high” Message:“fail to initial unit Sync of subtask test_etl_1 : database driver error” RawCause:“context deadline exceeded” Workaround:“Please check the database connection and the database config in configuration file.” , Workaround: Please execute query-status to check status.”, “source”: “test”,
“worker”: “dm-192.168.103.33-8272”
},
{
“result”: true,
“msg”: “”,
“source”: “test2”,
“worker”: “dm-192.168.103.33-8282”
}
]
}