found error when get sql_mode from binlog status_vars

[lance6716]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do? If possible, provide a recipe for reproducing the error.
   https://asktug.com/t/topic/63371

2. What did you expect to see?

3. What did you see instead?

[2020/11/02 17:06:20.040 +08:00] [WARN] [syncer.go:1676] [“found error when get sql_mode from binlog status_vars”] [error="[code=11117:class=functional:scope=internal:level=medium], Message: fail to parse binglog status_vars: [0 0 0 0 0 1 0 0 160 85 0 0 0 0 6 3 115 116 100 4 45 0 45 0 33 0 12 254], offset: 28, RawCause: EOF"]

4. Versions of the cluster

   • DM version (run dmctl -V or dm-worker -V or dm-master -V):

[lance6716]

the status_vars is (formatted)

0 0 0 0 0 
1 0 0 160 85 0 0 0 0 
6 3 115 116 100 
4 45 0 45 0 33 0 
12 254

last 12 represent Q_UPDATED_DB_NAMES, which means 254 should be understood as "there're 254 following zero-terminated string" 🤔