tidb-server --help exit with code 2

[lucklove]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

tidb-server --help
echo $?

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

0

3. What did you see instead (Required)

2

4. What is your TiDB version? (Required)

v5.0.0

Release Version: v5.0.0
Edition: Community
Git Commit Hash: bdac0885cd11bdf571aad9353bfc24e13554b91c
Git Branch: heads/refs/tags/v5.0.0
UTC Build Time: 2021-04-06 16:39:10
GoVersion: go1.13.4
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false

[lucklove]

You can simply replay this with TiUP:

tiup install tidb:v5.0.0
tiup tidb:v5.0.0 --help

And TiUP will catch the error code by print:

Cannot fetch help message from /Users/joshua/.tiup/components/tidb/v5.0.0/tidb-server failed: exit status 2

[xhebox]

/assign @xhebox

[ti-srebot]

Please edit this comment or add a new comment to complete the following information

Not a bug

1. Remove the 'type/bug' label
2. Add notes to indicate why it is not a bug

Duplicate bug

1. Add the 'type/duplicate' label
2. Add the link to the original bug

Bug

Note: Make Sure that 'component', and 'severity' labels are added
Example for how to fill out the template: #20100

1. Root Cause Analysis (RCA) (optional)

2. Symptom (optional)

3. All Trigger Conditions (optional)

4. Workaround (optional)

5. Affected versions

6. Fixed versions