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Use connect_retries_on_failure to control the number of retries when no backend server is available #4665

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Use connect_retries_on_failure to control the number of retries when no backend server is available #4665

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23 changes: 20 additions & 3 deletions lib/MySQL_Session.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3260,9 +3260,26 @@ bool MySQL_Session::handler_again___status_CONNECTING_SERVER(int *_rc) {
// 'mysql_thread___connect_retries_delay'. In case of 'async_connect' failing, 'pause_until' should also
// be set to 'mysql_thread___connect_retries_delay'. Complementary NOTE below.
if (mybe->server_myds->myconn==NULL) {
pause_until=thread->curtime+mysql_thread___connect_retries_delay*1000;
*_rc=1;
return false;
if (mybe->server_myds->connect_retries_on_failure > 0 ) {
mybe->server_myds->connect_retries_on_failure--;
pause_until=thread->curtime+mysql_thread___connect_retries_delay*1000;
*_rc=1;
return false;
} else {
char buf[256];
sprintf(buf,"Max connect failure reached and no server is available in hostgroup %d", current_hostgroup);
if (thread) {
thread->status_variables.stvar[st_var_max_connect_timeout_err]++;
}
client_myds->myprot.generate_pkt_ERR(true,NULL,NULL,1,9002,(char *)"HY000",buf,true);
RequestEnd(mybe->server_myds);

while (previous_status.size()) {
previous_status.pop();
}
mybe->server_myds->max_connect_time=0;
NEXT_IMMEDIATE_NEW(WAITING_CLIENT_DATA);
}
} else {
MySQL_Data_Stream *myds=mybe->server_myds;
MySQL_Connection *myconn=myds->myconn;
Expand Down