diff --git a/server/modules/filter/hint/hintparser.c b/server/modules/filter/hint/hintparser.c
index a70e42fe2..df0888508 100644
--- a/server/modules/filter/hint/hintparser.c
+++ b/server/modules/filter/hint/hintparser.c
@@ -550,7 +550,7 @@ HINT_TOKEN	*tok;
                 else if (!inword && inquote == '\0' && **ptr == '=')
                 {
                         *dest = **ptr;
-                        *dest++;
+                        dest++;
                         (*ptr)++;
                         break;
                 }
diff --git a/server/modules/filter/test/harness_common.c b/server/modules/filter/test/harness_common.c
index 3c42bfdde..fe782bc0d 100644
--- a/server/modules/filter/test/harness_common.c
+++ b/server/modules/filter/test/harness_common.c
@@ -748,9 +748,12 @@ int load_filter(FILTERCHAIN* fc, CONFIG* cnf)
 	}
   
 	int x;
-	for(x = 0;x<paramc;x++){
-		free(fparams[x]->name);
-		free(fparams[x]->value);
+
+	if(fparams){
+		for(x = 0;x<paramc;x++){
+			free(fparams[x]->name);
+			free(fparams[x]->value);
+		}
 	}
 
 	free(fparams);
@@ -769,15 +772,18 @@ FILTERCHAIN* load_filter_module(char* str)
 		flt_ptr->next = instance.head;
 	}
 
-	if((flt_ptr->instance = (FILTER_OBJECT*)load_module(str, MODULE_FILTER)) == NULL)
-		{
-			printf("Error: Module loading failed: %s\n",str);
-			skygw_log_write(LOGFILE_ERROR,"Error: Module loading failed: %s\n",str);
-			free(flt_ptr->down);
-			free(flt_ptr);
-			return NULL;
-		}
-	flt_ptr->name = strdup(str);
+	if(flt_ptr){
+		if( (flt_ptr->instance = (FILTER_OBJECT*)load_module(str, MODULE_FILTER)) == NULL)
+			{
+				printf("Error: Module loading failed: %s\n",str);
+				skygw_log_write(LOGFILE_ERROR,"Error: Module loading failed: %s\n",str);
+				free(flt_ptr->down);
+				free(flt_ptr);
+				return NULL;
+			}
+		flt_ptr->name = strdup(str);
+	}
+
 	return flt_ptr;
 }
 
@@ -925,14 +931,35 @@ GWBUF* gen_packet(PACKET pkt)
 
 int process_opts(int argc, char** argv)
 {
-	unsigned int fd = open_file("harness.cnf",1), buffsize = 1024;
-	int rd,rdsz;
-	unsigned int fsize;
+	int fd, buffsize = 1024;
+	int rd,rdsz, rval;
+	size_t fsize;
 	char *buff = calloc(buffsize,sizeof(char)), *tok = NULL;
 
 	/**Parse 'harness.cnf' file*/
-	fsize = lseek(fd,0,SEEK_END);
-	lseek(fd,0,SEEK_SET);
+
+	if(buff == NULL){
+		printf("Error: Call to malloc() failed.\n");
+		return 1;
+	}
+
+	if((fd = open_file("harness.cnf",1)) < 0){
+		printf("Failed to open configuration file.\n");
+		free(buff);
+		return 1;
+	}
+
+	
+	if( (rval = lseek(fd,0,SEEK_END)) < 0 || 
+		lseek(fd,0,SEEK_SET) < 0){
+		printf("Error: Cannot seek file.\n");
+		close(fd);
+		free(buff);
+		return 1;
+	}
+
+	fsize = (size_t)rval;
+
 	instance.thrcount = 1;
 	instance.session_count = 1;
 	rdsz = read(fd,buff,fsize);
diff --git a/server/modules/protocol/mysql_common.c b/server/modules/protocol/mysql_common.c
index 64cdd9f28..e54ea24ee 100644
--- a/server/modules/protocol/mysql_common.c
+++ b/server/modules/protocol/mysql_common.c
@@ -768,9 +768,43 @@ int gw_do_connect_to_backend(
 	setipaddress(&serv_addr.sin_addr, host);
 	serv_addr.sin_port = htons(port);
 	bufsize = GW_BACKEND_SO_SNDBUF;
-	setsockopt(so, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize));
+
+    if(setsockopt(so, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize)) != 0)
+		{
+       int eno = errno;
+                errno = 0;
+                LOGIF(LE, (skygw_log_write_flush(
+                        LOGFILE_ERROR,
+                        "Error: Failed to set socket options "
+                        "%s:%d failed.\n\t\t             Socket configuration failed "
+                        "due %d, %s.",
+                        host,
+                        port,
+                        eno,
+                        strerror(eno))));
+                rv = -1;
+                goto return_rv;
+		}
+
 	bufsize = GW_BACKEND_SO_RCVBUF;
-	setsockopt(so, SOL_SOCKET, SO_RCVBUF, &bufsize, sizeof(bufsize));
+
+    if(setsockopt(so, SOL_SOCKET, SO_RCVBUF, &bufsize, sizeof(bufsize)) != 0)
+		{
+       int eno = errno;
+                errno = 0;
+                LOGIF(LE, (skygw_log_write_flush(
+                        LOGFILE_ERROR,
+                        "Error: Failed to set socket options "
+                        "%s:%d failed.\n\t\t             Socket configuration failed "
+                        "due %d, %s.",
+                        host,
+                        port,
+                        eno,
+                        strerror(eno))));
+                rv = -1;
+                goto return_rv;
+		}
+
 	/* set socket to as non-blocking here */
 	setnonblocking(so);
         rv = connect(so, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
diff --git a/server/modules/routing/readwritesplit/readwritesplit.c b/server/modules/routing/readwritesplit/readwritesplit.c
index d7f68b5c3..574823660 100644
--- a/server/modules/routing/readwritesplit/readwritesplit.c
+++ b/server/modules/routing/readwritesplit/readwritesplit.c
@@ -830,8 +830,16 @@ static void* newSession(
          * Find a backend servers to connect to.
          * This command requires that rsession's lock is held.
          */
-        rses_begin_locked_router_action(client_rses);
 
+		succp = rses_begin_locked_router_action(client_rses);
+
+        if(!succp){
+                free(client_rses->rses_backend_ref);
+                free(client_rses);
+				client_rses = NULL;
+                goto return_rses;
+		}
+		
         succp = select_connect_backend_servers(&master_ref,
                                                backend_ref,
                                                router_nservers,
@@ -1610,8 +1618,12 @@ void check_create_tmp_table(
 	      rses_prop_tmp->rses_prop_type = RSES_PROP_TYPE_TMPTABLES;
 	      router_cli_ses->rses_properties[RSES_PROP_TYPE_TMPTABLES] = rses_prop_tmp;
 	    }
+	  else
+		{
+		  LOGIF(LE, (skygw_log_write_flush(LOGFILE_ERROR,"Error : Call to malloc() failed.")));
+		}
 	}
-		
+	  if(rses_prop_tmp){
       if (rses_prop_tmp->rses_prop_data.temp_tables == NULL)
 	{
 	  h = hashtable_alloc(7, hashkeyfun, hashcmpfun);
@@ -1647,6 +1659,8 @@ void check_create_tmp_table(
 	  }
       }
 #endif
+	  }
+	  
       free(hkey);
       free(tblname);
     }