search log return empty data

[wk989898]

Bug Report

Please answer these questions before submitting your issue. Thanks!

What did you do? search log like len(tables)==0 will return empty data.

What did you expect to see? display some logs

What did you see instead? empty

What version of TiDB Dashboard are you using (./tidb-dashboard --version)? master

[baurine]

what does your expected logs look like, can you attach some example logs?

[wk989898]