应用程序偶尔会发生连接异常：报Connection must be valid and open.
TIDB服务端会看的异常信息：
[2023/12/21 16:46:14.535 +08:00] [WARN] [simple.go:2549] [“Kill failed: Received a 32bits truncated ConnectionID, expect 64bits. Please execute ‘KILL [CONNECTION | QUERY] ConnectionID’ to send a Kill without truncating ConnectionID.”] [connID=3823]
[2023/12/21 16:46:18.328 +08:00] [ERROR] [terror.go:315] [“encountered error”] [error=“write tcp XXXX:4003->XXXX:47643: write: connection reset by peer”] [stack=“github.com/pingcap/tidb/parser/terror.Log\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/parser/terror/terror.go:315\ngithub.com/pingcap/tidb/server.(*packetIO).writePacket\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/packetio.go:190\ngithub.com/pingcap/tidb/server.(*clientConn).writePacket\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:446\ngithub.com/pingcap/tidb/server.(*clientConn).writeChunks\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:2388\ngithub.com/pingcap/tidb/server.(*clientConn).writeResultset\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:2285\ngithub.com/pingcap/tidb/server.(*clientConn).handleStmt\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:2152\ngithub.com/pingcap/tidb/server.(*clientConn).handleQuery\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:1972\ngithub.com/pingcap/tidb/server.(*clientConn).dispatch\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:1403\ngithub.com/pingcap/tidb/server.(*clientConn).Run\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/conn.go:1152\ngithub.com/pingcap/tidb/server.(*Server).onConn\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/server/server.go:648”]