[zeromq-dev] Forwarder stops forwarding

Robert Zhang robert at scout-trading.com
Tue Jun 1 17:56:48 CEST 2010

Bit more details. We're running the standard download zeromq-2.0.6 from the website.
Linux 2.6.28-18-server #60-Ubuntu SMP
Compiled using gcc 4.3.3

Btw, when I configure the package with "--with-cpp --with-pgm --with-pgm-examples",  the Makefile in the perf directory seems to have a path problem. It's looking for  `../../foreign/openpgm/libpgm-2.0.24/openpgm/pgm/examples/pgmsend.c' when it should be  `../foreign/openpgm/libpgm-2.0.24/openpgm/pgm/examples/pgmsend.c'

From: Robert Zhang
Sent: Tuesday, June 01, 2010 11:12 AM
To: 'zeromq-dev at lists.zeromq.org'
Subject: Forwarder stops forwarding

Has anyone seen this problem? We have a forwarder that stops forwarding messages after running for about a day pretty consistently. Seems to be stuck in a lock. I'll try to run forwarder in a debug build and maybe we can get a better stack trace.  Thanks.

Config looks like this:
        <connect addr = "tcp://host1:30006"/>
        <bind addr = "tcp://eth0:30008"/>

(gdb) info thread
  2 Thread 0x7fd0e1d40910 (LWP 14401)  0x00007fd0e292fe48 in epoll_wait () from /lib/libc.so.6
  1 Thread 0x7fd0e3c20750 (LWP 14398)  0x00007fd0e3067c34 in __lll_lock_wait () from /lib/libpthread.so.0

(gdb) where
#0  0x00007fd0e292fe48 in epoll_wait () from /lib/libc.so.6
#1  0x00007fd0e37b0b72 in zmq::epoll_t::loop (this=0x1332b70) at epoll.cpp:161
#2  0x00007fd0e37c38a7 in zmq::thread_t::thread_routine (arg_=0x1332bb0) at thread.cpp:99
#3  0x00007fd0e3060a04 in start_thread () from /lib/libpthread.so.0
#4  0x00007fd0e292f80d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

(gdb) where
#0  0x00007fd0e3067c34 in __lll_lock_wait () from /lib/libpthread.so.0
#1  0x00007fd0e3063295 in _L_lock_949 () from /lib/libpthread.so.0
#2  0x00007fd0e30630b8 in pthread_mutex_lock () from /lib/libpthread.so.0
#3  0x00007fd0e37c5328 in zmq::ypollset_t::poll (this=<value optimized out>) at simple_semaphore.hpp:127
#4  0x00007fd0e37ac632 in zmq::app_thread_t::process_commands (this=0x1331ec0, block_=128, throttle_=false) at app_thread.cpp:93
#5  0x00007fd0e37bf6ed in zmq::socket_base_t::recv (this=0x13338c0, msg_=0x7fffe0c9b300, flags_=0) at socket_base.cpp:380
#6  0x0000000000408225 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../include/zmq.hpp:241

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