The ia_atime type is uin32_t. When trace translator is used and it accesses ia_atime in strftime the client process crashes. This is the backtrace of the core obtained.

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

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /usr/local/lib/libglusterfs.so.0...done.
Loaded symbols for /usr/local/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 /usr/local/lib/glusterfs/3.0.0git/xlator/protocol/client.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/protocol/client.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/performance/write-behind.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/performance/write-behind.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/performance/read-ahead.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/performance/read-ahead.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/performance/io-cache.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/performance/io-cache.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/performance/quick-read.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/performance/quick-read.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/debug/trace.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/debug/trace.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/performance/stat-prefetch.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/performance/stat-prefetch.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/xlator/mount/fuse.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/xlator/mount/fuse.so
Reading symbols from /usr/local/lib/glusterfs/3.0.0git/transport/socket.so...done.
Loaded symbols for /usr/local/lib/glusterfs/3.0.0git/transport/socket.so
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
Reading symbols from /usr/lib64/libgcc_s.so.1...done.
Loaded symbols for /usr/lib64/libgcc_s.so.1
Core was generated by `glusterfs -f client-server-tcp.vol /d/glusterfs/mnt/client1/ -l /tmp/new_client'.
Program terminated with signal 11, Segmentation fault.
[New process 15699]
[New process 15705]
[New process 15700]
#0  0x00007f27da096aa1 in __strftime_internal () from /lib64/libc.so.6
(gdb) bt
#0  0x00007f27da096aa1 in __strftime_internal () from /lib64/libc.so.6
#1  0x00007f27da098906 in strftime_l () from /lib64/libc.so.6
#2  0x00007f27d8b8585a in trace_stat_to_str (stbuf=0x7fff4e169950) at ../../../../../xlators/debug/trace/src/trace.c:71
#3  0x00007f27d8b881f4 in trace_lookup_cbk (frame=0x617e90, cookie=0x617d50, this=0x612ae0, op_ret=0, op_errno=22, 
    inode=0x6146a0, buf=0x7fff4e169950, xattr=0x617d10, postparent=0x7fff4e1698e0)
    at ../../../../../xlators/debug/trace/src/trace.c:606
#4  0x00007f27d8d98235 in qr_lookup_cbk (frame=0x617d50, cookie=0x617be0, this=0x612110, op_ret=0, op_errno=22, 
    inode=0x6146a0, buf=0x7fff4e169950, dict=0x617d10, postparent=0x7fff4e1698e0)
    at ../../../../../xlators/performance/quick-read/src/quick-read.c:243
#5  0x00007f27d8fa6787 in ioc_lookup_cbk (frame=0x617be0, cookie=0x617c40, this=0x611740, op_ret=0, op_errno=22, 
    inode=0x6146a0, stbuf=0x7fff4e169950, dict=0x617d10, postparent=0x7fff4e1698e0)
    at ../../../../../xlators/performance/io-cache/src/io-cache.c:249
#6  0x00007f27da7a3669 in default_lookup_cbk (frame=0x617c40, cookie=0x618350, this=0x610e30, op_ret=0, op_errno=22, 
    inode=0x6146a0, buf=0x7fff4e169950, dict=0x617d10, postparent=0x7fff4e1698e0)
    at ../../../libglusterfs/src/defaults.c:47
#7  0x00007f27da7a3669 in default_lookup_cbk (frame=0x618350, cookie=0x6183b0, this=0x610500, op_ret=0, op_errno=22, 
    inode=0x6146a0, buf=0x7fff4e169950, dict=0x617d10, postparent=0x7fff4e1698e0)
    at ../../../libglusterfs/src/defaults.c:47
#8  0x00007f27d95e9ff3 in client_lookup_cbk (frame=0x6183b0, hdr=0x617fe0, hdrlen=276, iobuf=0x0)
    at ../../../../../xlators/protocol/client/src/client-protocol.c:4975
#9  0x00007f27d95ee820 in protocol_client_interpret (this=0x60f840, trans=0x6157d0, hdr_p=0x617fe0 "", hdrlen=276, 
    iobuf=0x0) at ../../../../../xlators/protocol/client/src/client-protocol.c:6529
#10 0x00007f27d95ef4e6 in protocol_client_pollin (this=0x60f840, trans=0x6157d0)
    at ../../../../../xlators/protocol/client/src/client-protocol.c:6827
#11 0x00007f27d95efb5a in notify (this=0x60f840, event=2, data=0x6157d0)
    at ../../../../../xlators/protocol/client/src/client-protocol.c:6946
#12 0x00007f27da7a12ac in xlator_notify (xl=0x60f840, event=2, data=0x6157d0) at ../../../libglusterfs/src/xlator.c:924
#13 0x00007f27d7d4706f in socket_event_poll_in (this=0x6157d0) at ../../../../transport/socket/src/socket.c:731
#14 0x00007f27d7d47369 in socket_event_handler (fd=9, idx=1, data=0x6157d0, poll_in=1, poll_out=0, poll_err=0)
    at ../../../../transport/socket/src/socket.c:831
#15 0x00007f27da7c707f in event_dispatch_epoll_handler (event_pool=0x60b060, events=0x616ca0, i=0)
    at ../../../libglusterfs/src/event.c:804
#16 0x00007f27da7c724e in event_dispatch_epoll (event_pool=0x60b060) at ../../../libglusterfs/src/event.c:867
#17 0x00007f27da7c755f in event_dispatch (event_pool=0x60b060) at ../../../libglusterfs/src/event.c:975
#18 0x0000000000406310 in main (argc=6, argv=0x7fff4e16a608) at ../../../glusterfsd/src/glusterfsd.c:1417
(gdb) f 2
#2  0x00007f27d8b8585a in trace_stat_to_str (stbuf=0x7fff4e169950) at ../../../../../xlators/debug/trace/src/trace.c:71
71	        strftime (atime_buf, 256, "[%b %d %H:%M:%S]",
(gdb) q

changing ia_atime to unit64_t worked properly.