diff --git a/include/proxysql_debug.h b/include/proxysql_debug.h
index 5ed055364..866dbc82a 100644
--- a/include/proxysql_debug.h
+++ b/include/proxysql_debug.h
@@ -27,7 +27,9 @@ extern int gdbg;
 #define proxy_debug(module, verbosity, fmt, ...)
 #endif /* DEBUG */
 
+/*
 #ifdef DEBUG
+*/
 #define proxy_error(fmt, ...) \
 	do { \
 		time_t __timer; \
@@ -38,6 +40,7 @@ extern int gdbg;
 		strftime(__buffer, 25, "%Y-%m-%d %H:%M:%S", __tm_info); \
 		proxy_error_func("%s %s:%d:%s(): [ERROR] " fmt, __buffer, __FILE__, __LINE__, __func__ , ## __VA_ARGS__); \
 	} while(0)
+/*
 #else
 #define proxy_error(fmt, ...) \
 	do { \
@@ -50,8 +53,10 @@ extern int gdbg;
     proxy_error_func("%s [ERROR] " fmt , __buffer , ## __VA_ARGS__); \
 	} while(0)
 #endif
-
+*/
+/*
 #ifdef DEBUG
+*/
 #define proxy_warning(fmt, ...) \
 	do { \
 		time_t __timer; \
@@ -62,6 +67,7 @@ extern int gdbg;
 		strftime(__buffer, 25, "%Y-%m-%d %H:%M:%S", __tm_info); \
 		proxy_error_func("%s %s:%d:%s(): [WARNING] " fmt, __buffer, __FILE__, __LINE__, __func__ , ## __VA_ARGS__); \
 	} while(0)
+/*
 #else
 #define proxy_warning(fmt, ...) \
 	do { \
@@ -74,7 +80,7 @@ extern int gdbg;
     proxy_error_func("%s [WARNING] " fmt , __buffer , ## __VA_ARGS__); \
 	} while(0)
 #endif
-
+*/
 #ifdef DEBUG
 #define proxy_info(fmt, ...) \
 	do { \
diff --git a/lib/MySQL_Session.cpp b/lib/MySQL_Session.cpp
index 6df624f54..71477c5be 100644
--- a/lib/MySQL_Session.cpp
+++ b/lib/MySQL_Session.cpp
@@ -1094,7 +1094,7 @@ handler_again:
 						if (myerr > 2000) {
 							bool retry_conn=false;
 							// client error, serious
-							proxy_error("Detected a broken connection during query on (%d,%s,%d) : %d, %s\n", myconn->parent->myhgc->hid, myconn->parent->address, myconn->parent->port, myerr, mysql_error(myconn->mysql));
+							proxy_error("Detected a broken connection during query on (%d,%s,%d) , FD (Conn:%d , MyDS:%d) : %d, %s\n", myconn->parent->myhgc->hid, myconn->parent->address, myconn->parent->port, myds->fd, myds->myconn->fd, myerr, mysql_error(myconn->mysql));
 							//if ((myds->myconn->reusable==true) && ((myds->myprot.prot_status & SERVER_STATUS_IN_TRANS)==0)) {
 							if (myds->query_retries_on_failure > 0) {
 								myds->query_retries_on_failure--;
@@ -1484,12 +1484,14 @@ handler_again:
 				assert(st==status);
 				unsigned long long curtime=monotonic_time();
 				//mybe->server_myds->myprot.init(&mybe->server_myds, mybe->server_myds->myconn->userinfo, this);
-				if (myds->mypolls==NULL) {
-					thread->mypolls.add(POLLIN|POLLOUT, mybe->server_myds->fd, mybe->server_myds, curtime);
-				}
 /* */
 				assert(myconn->async_state_machine!=ASYNC_IDLE);
 				rc=myconn->async_connect(myds->revents);
+				if (myds->mypolls==NULL) {
+					// connection yet not in mypolls
+					myds->assign_fd_from_mysql_conn();
+					thread->mypolls.add(POLLIN|POLLOUT, mybe->server_myds->fd, mybe->server_myds, curtime);
+				}
 				switch (rc) {
 					case 0:
 						myds->myds_type=MYDS_BACKEND;
diff --git a/lib/MySQL_Thread.cpp b/lib/MySQL_Thread.cpp
index f72d8b94e..23fc639f4 100644
--- a/lib/MySQL_Thread.cpp
+++ b/lib/MySQL_Thread.cpp
@@ -1779,7 +1779,19 @@ void MySQL_Thread::run() {
 			// check for timeout
 			} else {
 				// check if the FD is valid
-				assert(mypolls.fds[n].revents!=POLLNVAL);
+				if (mypolls.fds[n].revents==POLLNVAL) {
+					// debugging output before assert
+					MySQL_Data_Stream *_myds=mypolls.myds[n];
+					if (_myds) {
+						if (_myds->myconn) {
+							proxy_error("revents==POLLNVAL for FD=%d, events=%d, MyDSFD=%d, MyConnFD=%d\n", mypolls.fds[n].fd, mypolls.fds[n].events, myds->fd, myds->myconn->fd);
+							assert(mypolls.fds[n].revents!=POLLNVAL);
+						}
+					}
+					// if we reached her, we didn't assert() yet
+					proxy_error("revents==POLLNVAL for FD=%d, events=%d, MyDSFD=%d\n", mypolls.fds[n].fd, mypolls.fds[n].events, myds->fd);
+					assert(mypolls.fds[n].revents!=POLLNVAL);
+				}
 				switch(myds->myds_type) {
 		// Note: this logic that was here was removed completely because we added mariadb client library.
 					case MYDS_LISTENER:
diff --git a/lib/mysql_connection.cpp b/lib/mysql_connection.cpp
index 30ac14d41..fbcdfd900 100644
--- a/lib/mysql_connection.cpp
+++ b/lib/mysql_connection.cpp
@@ -458,7 +458,7 @@ handler_again:
 		case ASYNC_CONNECT_END:
 			if (!ret_mysql) {
 				// always increase the counter
-				proxy_error("Failed to mysql_real_connect() on %s:%d , %d: %s\n", parent->address, parent->port, mysql_errno(mysql), mysql_error(mysql));
+				proxy_error("Failed to mysql_real_connect() on %s:%d , FD (Conn:%d , MyDS:%d) , %d: %s.\n", parent->address, parent->port, mysql->net.fd , myds->fd, mysql_errno(mysql), mysql_error(mysql));
     		NEXT_IMMEDIATE(ASYNC_CONNECT_FAILED);
 			} else {
     		NEXT_IMMEDIATE(ASYNC_CONNECT_SUCCESSFUL);