Race Condition causes error in client when Hera server is under capacity

[stephanievu]

What I Did
I ran longevity test with all MySQL operations (Select, Insert, update, delele) repeatedly with 10 threads
On Hera server side, I have 5 workers to serve the requests

What I Expected
Because Hera server was under capacity, I got lots of errors from client such as backlog timeout, saturation kill, soft eviction which is expected

What I Saw Instead
Beside errors such as backlog timeout, saturation kill, soft eviction, client also gets eror “Unknown Error cmd=5” when there is "multiple_client_req" is seen

Error in log:
21:38:42.926064 warn: [PROXY coordinator.go:775] doSession: multiple client req worker (type0,inst0,id2) 12942 1:9, reqns=360:0 16:2006 CorrId=null,183:25 insert /* EmployeeDao_insert_8_425075257 */ into EMPLOYEE...edate,2:3 ,5:2 job,9:3 B_17656,5:2 mgr,4:3 55,5:2 sal,8:3 8000.0,7:2 empno,7:3 17656,1:4,, reqcorrid=16:2006 CorrId=null,

[stephanievu]

Verified the fix. Closing this issue