[zeromq-dev] Assertion failure in libzm msg.cpp:296 when reading from ZMQ_STREAM socket

[Auer, Jens]

Hi,

we have a spurious crash in our program form inside the zeroMQ library with zeroMQ 4.1.3. The backtrace points to code reading from a TCP socket to a ZMQ_STREAM socket:
#0  0x00007fa8341145d7 in raise () from /lib64/libc.so.6
#1  0x00007fa834115cc8 in abort () from /lib64/libc.so.6
#2  0x00007fa83410d546 in __assert_fail_base () from /lib64/libc.so.6
#3  0x00007fa83410d5f2 in __assert_fail () from /lib64/libc.so.6
#4  0x00007fa834f0097a in zmq::msg_t::set_metadata (this=this at entry=0x7fa82c06ca88, metadata_=0x7fa82c06eb30) at src/msg.cpp:296
#5  0x00007fa834f1c270 in zmq::stream_engine_t::push_raw_msg_to_session (this=0x7fa82c06a600, msg_=0x7fa82c06ca88) at src/stream_engine.cpp:846
#6  0x00007fa834f1cff5 in zmq::stream_engine_t::restart_input (this=0x7fa82c06a600) at src/stream_engine.cpp:428
#7  0x00007fa834f11452 in zmq::session_base_t::write_activated (this=0x2265310, pipe_=0x2264b00) at src/session_base.cpp:278
#8  0x00007fa834efa46c in zmq::io_thread_t::in_event (this=0x2249be0) at src/io_thread.cpp:83
#9  0x00007fa834ef93de in zmq::epoll_t::loop (this=0x22485b0) at src/epoll.cpp:176
#10 0x00007fa834f25030 in thread_routine (arg_=0x2248630) at src/thread.cpp:96
#11 0x00007fa834cc6df5 in start_thread () from /lib64/libpthread.so.0
#12 0x00007fa8341d51ad in clone () from /lib64/libc.so.6

The code basically reads polls on the socket in a Reactor, and then reads all available message parts from the socket with ZMQ_DONTWAIT. Does anybody know this problem? I don't know if we cause the problem, but I tried valgrind to rule out memory corruption problems.

Best wishes,
  Jens

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