Proxy blocked when concurrent clients more than max worker threads

[tuohai666]

For English only, other languages we will close it directly.

Please answer these questions before submitting your issue. Thanks!

Which version of Sharding-Sphere do you using?

dev

Expected behavior

Concurrent clients of any amount perform normally.

Actual behavior

Proxy blocked when concurrent clients more than max worker threads.

Reason analyze

For now one thread pool is shared between frontend and backend. When frontend threads more than max worker threads, there are no threads for backend workers. No data will be queried, and no more clients will be connected.

Steps to reproduce the behavior

As title.

For bug report, please MUST provide the reproduce example codes (such as a github link).