cdc: integrated test "cdc_hang_on" is not stable

[pingyu]

Bug Report

1. Describe the bug

CDC integrated test "cdc_hang_on" is not stable.

Case 1

[2022-11-04T12:37:14.772Z] cdc_hang_on test 4
[2022-11-04T12:37:14.773Z] /home/jenkins/agent/workspace/common-check/migration/cdc/tests/integration_tests/cdc_hang_on/run.sh: line 58: kill: (399) - No such process

See: https://ci.pingcap.net/blue/organizations/jenkins/common-check/detail/common-check/112025/pipeline/

Case 2 (after fix case 1 by check $name =~ pd[0-9]+)

[2022-11-05T10:31:26.130Z] cdc_hang_on test 6
[2022-11-05T10:31:26.130Z] pd leader: pd2
[2022-11-05T10:31:26.130Z] /home/jenkins/agent/workspace/common-check/migration/cdc/tests/integration_tests/cdc_hang_on/run.sh: line 70: kill: (686) - No such process
[2022-11-05T10:31:44.209Z] make: *** [integration_test] Error 1

See: https://ci.pingcap.net/blue/organizations/jenkins/common-check/detail/common-check/112058/pipeline/

2. Minimal reproduce step (Required)

Run CI.

3. What did you see instead (Required)

CI pass.

4. What did you expect to see? (Required)

CI failed.

5. What is your migration tool and TiKV version? (Required)

• TiKV: master ([close #231] TiKV-BR support v5.x.x #282)
• TiKV CDC:
• TiKV BR:
• TiKV Online Bulk Load:

[github-actions]

This issue is stale because it has been open 30 days with no activity.