ofiwg / librdmacm

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rshutdown hangs indefinitely

toolslive opened this issue · comments

If this isn't the right place to report this, then please redirect or forward.

We've seen processes that use the rsocket library hang indefinitely.
Here's a backtrace from such a process (obtained via gdb -p ...)

#0  0x00007f7d76bdf3ad in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7d73e611f3 in read (__nbytes=8, __buf=0x7fff8c56c850, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  __ibv_get_cq_event (channel=<optimized out>, cq=0x7fff8c56c880, cq_context=0x7fff8c56c888) at src/verbs.c:484
#3  0x00007f7d75688394 in ?? () from /usr/lib/librdmacm.so.1
#4  0x00007f7d75689ec0 in ?? () from /usr/lib/librdmacm.so.1
#5  0x00007f7d7568d23e in rshutdown () from /usr/lib/librdmacm.so.1
#6  0x00007f7d7568ec1a in rclose () from /usr/lib/librdmacm.so.1
#7  0x0000000000ddf454 in ordma_rclose (fd=<optimized out>) at ordma_close.c:28

This is version 1.0.21 (installed via debian package: librdmacm1 1.0.21mlnx-OFED.3.3.0.0.1.33100 )

It seems to be related to this SO question:
http://stackoverflow.com/questions/38119745/how-to-avoid-getting-stuck-in-rdma-get-recv-comp-or-ibv-get-cq-event