ChenYihao

DB query timeout may be another problem, see https://github.com/eclipse-vertx/vertx-sql-client/issues/668. Although we can separate the connection pool, the should-be-timeout queries will also be blocked on the long time waiting waiter queue....

> you can limit the wait queue size of the pool to limit this effect Thanks, this is our current solution, but it may be a little hard to find...

It seems be a more general feature, if so this feature might be placed in the connection pool interface/implementation in vertx-core which vertx-sql-client depends on?

> You could workaround your issue by explicitly obtaining the connection instead of calling execute directly. That way, the connection timeout setting of the pool will be honored and you'll...

> can you provide a reproducer ? Sure, I've made [a commit](https://github.com/cyhii/vertx-starter-demo/commit/6371b638883c59ce7c85a9f907b7e3b9a0be6a58) to my demo project to reproduce this issue Steps: 1. Start a Kafka server on localhost(follow the [quickstart](https://kafka.apache.org/quickstart))...