Hi, I'm new to libevent and have the following problem with bufferevents. I have a server talking to many clients. Very occasionally (when the number of clients is around 1000 or larger), the server writes a message to the client, which is read by the client (strace shows that readv() is successfully called) but the read callback of the client is not invoked. Subsequently, both server and client side of the connection wait for input in epoll_wait() until timeout.
The problem exhibits itself with libevent 2.0.16, 2.0.19 and the 2.1.1 alpha. I'm using a default event base (level-triggered I/O) with default watermarks. Surely, I must be making a simple mistake somewhere, like introducing a race condition, but I can't find it. I made a simple program which demonstrates the behaviour: http://pastebin.com/FaCuCwU5 Compile with gcc -std=gnu99 -Wall -pedantic test.c -levent and run with ./a.out [number of clients]. For me, with 500 clients, everything is fine, while with 1000 clients, a few connections stall. Make sure you set your file descriptor limit sufficiently high. Any help is appreciated. Best regards, Alexander *********************************************************************** To unsubscribe, send an e-mail to majord...@freehaven.net with unsubscribe libevent-users in the body.
