It works by identifying correlations between logs and discussions in technical forums and flagging them as events within Kibana. The answer is Logz.io’s Cognitive Insights - a technology that combines machine learning with crowdsourcing to help reveal exactly this type of event. So, how was the Netty memory leak identified in this case? In a production environment handling millions of logs messages a day though, these events run the risk of going unnoticed - until disaster strikes and memory runs out, that is.
#DELUGE CLIENT MEMORY LEAK MANUAL#
Manual tweaking of the cleanup process for unused objects is extremely tricky and blown up memory usage is a scenario experienced by many scarred engineering teams (don’t believe me? just Google it). In the past, we’ve shared some lessons learned from a ByteBuf memory leak and there are other types of memory issues that can arise, especially when handling high volumes of data. Netty memory leaks are not an uncommon occurrence. They are Dockerized Java services, based on Netty, and are designed to handle extremely high throughput. Logz.io’s log listeners act as the entry point for data collected from our users and are subsequently pushed to our Kafka instances.
If the numbers printed in the debug output are constantly increasing, your program is leaking sockets and you'll need to figure out why/how and fix it. Then run your program, and watch its stdout output. then temporarily replace all the calls to socket() in your program with debug_socket(), and all the calls to close() in your program with debug_close(). Printf("After close() call succeeded, there now %i sockets in use by this program\n", socketCount) Printf("After socket() call succeeded, there are now %i sockets in use by this program\n", socketCount) Int ret = socket(domain, type, protocol) Int debug_socket(int domain, int type, int protocol) I don't see any actual memory allocations in the posted code, so if there is a direct memory leak, it must be caused by a problem somewhere else in the program.Īs mentioned, another possibility is a socket leak since each socket comes with buffers that use up a certain amount of RAM, that could show up as increased memory usage as well.Īn easy way to test to see if your program is leaking sockets would be to add something like this to your program: static int socketCount = 0 The main part int main( int argc, char* argv ) If (bind(clientSocket, (struct sockaddr *)&local_addr, sizeof(local_addr))< 0) Memset(serverAddr.sin_zero, '\0', sizeof serverAddr.sin_zero) ĬlientSocket = socket(AF_INET, SOCK_DGRAM, 0) ServerAddr.sin_addr.s_addr = inet_addr(DST_IP) ** Configure settings in address struct **/ Local_addr.sin_addr.s_addr = inet_addr(SRC_IP) Memset(&local_addr, 0, sizeof(struct sockaddr_in)) Printf("%s|%s|%s|%s\n",t1_str_, t2_str_rec, t3_str_rec, t4_str) Īnd the function to set the params socket: void set_param() NBytes = recvfrom(clientSocket,cadena_recibida,sizeof(cadena_recibida),0,NULL, NULL) įor(i=17 i<33 i++) t2_str_rec=cadena_recibida įor(i=34 i<51 i++) t3_str_rec=cadena_recibida Int recibo = select(numfd, &readfds,NULL,NULL,&tv) Int flags = fcntl(clientSocket, F_GETFL, 0) įcntl(clientSocket, F_SETFL, flags | O_NONBLOCK) If ( sendto(clientSocket,cadena_enviada,sizeof(cadena_enviada),0,(struct sockaddr *)&serverAddr,addr_size) < 0) If ( connect( clientSocket, ( struct sockaddr * ) &serverAddr, sizeof( serverAddr) ) < 0 ) I need to detect what causes this problem because the program will be running for long time. The increment is in the client side, the server is working fine.
#DELUGE CLIENT MEMORY LEAK CODE#
My code ran fine, but I can see in the timeline that the ram increased considerably, at around 14 hours the memory increased to 150M approximately. The client sent a query to the server each second for a long time (e.g.: 1 week).