i am getting sporadic core dumps with my zmq programs.
no pattern detectable yet, except that whenever it happens,
the immediate cause is a zero zmq_msg_t. e.g.
(gdb) bt
#0 zmq_msg_close(._0 *) (msg_=0x7fff1e481d10) at zmq.cpp:171
#1 0x00002aefdbe7eff8 in zmq::pipe_t::~pipe_t (this=0x32beb30,
__in_chrg=<value optimized out>) at pipe.cpp:333
#2 0x00002aefdbe7c21b in zmq::object_t::process_command
(this=0x32beb90,
cmd_=...) at object.cpp:102
#3 0x00002aefdbe7449c in zmq::app_thread_t::process_commands (
this=0x31af0f0, block_=<value optimized out>,
throttle_=<value optimized out>) at app_thread.cpp:128
#4 0x00002aefdbe8d384 in zmq_poll(._1 *, int, long)
(items_=0x7fff1e481fc0,
nitems_=2, timeout_=-1) at zmq.cpp:448
#5 0x0000000000401a00 in main (argc=0, argv=0x7fff1e48a790) at
kahuna.c:152
(gdb) print *msg_
$2 = {content = 0x0, flags = 0 '\000', vsm_size = 0 '\000',
vsm_data = '\000' <repeats 29 times>}
(gdb) quit
as you can see, this is happening deep inside zmq_poll, but i have
also seen
this zero msg being returned by zmq_recv.
i am running 2.0.9 on red hat enterprise 5.4.
------------------
Andrew Hume (best -> Telework) +1 623-551-2845
and...@research.att.com (Work) +1 none currently
AT&T Labs - Research; member of USENIX and LOPSA
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