The glusterfs server crashed while doing read opearation. The setup was distribute. error-gen was used with ENOMEM. It was observed in 2.0.10rc1 on my local machine. This is the backtrace of the core generated.


[?1034hGNU gdb 6.8
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This GDB was configured as "x86_64-slackware-linux"...

warning: core file may not match specified executable file.

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/libglusterfs.so.0...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/libglusterfs.so.0
Reading symbols from /lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libpthread.so.0...done.
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/storage/posix.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/storage/posix.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/debug/error-gen.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/debug/error-gen.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/features/locks.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/features/locks.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/performance/io-threads.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/performance/io-threads.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/protocol/server.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/xlator/protocol/server.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/transport/socket.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/transport/socket.so
Reading symbols from /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/auth/addr.so...done.
Loaded symbols for /opt/glusterfs/2.0.10rc1/lib/glusterfs/2.0.10rc1/auth/addr.so
Reading symbols from /usr/lib64/libgcc_s.so.1...done.
Loaded symbols for /usr/lib64/libgcc_s.so.1
Core was generated by `/opt/glusterfs/2.0.10rc1/sbin/glusterfsd -f error-export.vol -l /tmp/error.log'.
Program terminated with signal 11, Segmentation fault.
[New process 5200]
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[New process 5220]
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#0  0x00007f1f0d275aa0 in pthread_spin_lock () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00007f1f0d275aa0 in pthread_spin_lock () from /lib64/libpthread.so.0
#1  0x00007f1f0d6b4fe7 in iobuf_unref (iobuf=0x20000) at iobuf.c:432
#2  0x00007f1f0d6b5068 in iobref_destroy (iobref=0x7f1f0ad97fd0) at iobuf.c:507
#3  0x00007f1f0937a02d in __socket_ioq_entry_free (entry=0x62a540) at socket.c:329
#4  0x00007f1f0937b839 in __socket_ioq_churn_entry (this=<value optimized out>, entry=0x62a540) at socket.c:369
#5  0x00007f1f0937b98b in socket_submit (this=0x61dd50, buf=0x62af30 "", len=108, vector=<value optimized out>, count=0, 
    iobref=<value optimized out>) at socket.c:1305
#6  0x00007f1f0bca8a7c in protocol_server_reply (frame=0x7f1efc00b910, type=4, op=13, hdr=0x62af30, hdrlen=108, vector=0x0, count=0, 
    iobref=0x7f1f0ad97fd0) at server-protocol.c:64
#7  0x00007f1f0bcb4bd7 in server_readv_cbk (frame=0x7f1efc00b910, cookie=<value optimized out>, this=0x611930, op_ret=-1, 
    op_errno=107, vector=0x0, count=0, stbuf=0x0, iobref=0x7f1f0ad97fd0) at server-protocol.c:1974
#8  0x00007f1f0bec7b2c in iot_readv_cbk (frame=<value optimized out>, cookie=<value optimized out>, this=<value optimized out>, 
    op_ret=0, op_errno=6465136, vector=0x1, count=0, stbuf=0x0, iobref=0x7f1f0ad97fd0) at io-threads.c:784
#9  0x00007f1f0c0d51fc in pl_readv_cbk (frame=<value optimized out>, cookie=<value optimized out>, this=<value optimized out>, 
    op_ret=0, op_errno=6465136, vector=0x1, count=0, stbuf=0x0, iobref=0x7f1f0ad97fd0) at posix.c:360
#10 0x00007f1f0c2e0ec9 in error_gen_readv (frame=0x62a1f0, this=0x60fea0, fd=0x7f1efc00be40, size=131072, offset=524288)
    at error-gen.c:821
#11 0x00007f1f0c0d6bbd in pl_readv (frame=0x620b30, this=0x6101b0, fd=0x7f1efc00be40, size=0, offset=1) at posix.c:506
#12 0x00007f1f0beca120 in iot_readv_wrapper (frame=0x7f1efc008210, this=0x610380, fd=0x7f1efc00be40, size=131072, offset=524288)
    at io-threads.c:794
#13 0x00007f1f0d6a89bf in call_resume (stub=0x7f1efc00f610) at call-stub.c:2399
#14 0x00007f1f0bec8b08 in iot_worker_ordered (arg=<value optimized out>) at io-threads.c:1943
#15 0x00007f1f0d2713a0 in start_thread () from /lib64/libpthread.so.0
#16 0x00007f1f0cfdebdd in clone () from /lib64/libc.so.6
(gdb) 



script containing the tests was running during the time of crash.