tidb_stderr.log 里没有，tidb.log有报错，
[2022/08/25 10:36:35.048 +08:00] [ERROR] [terror.go:307] [“encountered error”] [error="[server:1045]Access denied for user ‘root’@‘16.16.16.65’ (using password: NO)"] [stack="github.com/pingcap/tidb/parser/terror.Log\
\t/home/jenkins/agent/workspace/build-common/go/sr
c/github.com/pingcap/tidb/parser/terror/terror.go:307\ngithub.com/pingcap/tidb/server.(*Server).onConn\
\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/server.go:516"]
这是因为16.16.16.65之前是drainer，我配置了binlog，感觉并发太低了，我先把pump和drainer暂停了，所以会有这个报错。