Description of problem:
Created a 3x2 distributed-replicate volume with following options.
Volume Name: vol
Type: Distributed-Replicate
Volume ID: d02487da-ef7b-47c3-8c86-5e435f76211f
Status: Started
Number of Bricks: 3 x 2 = 6
Transport-type: tcp
Bricks:
Brick1: dagobah:/data/export1
Brick2: dagobah:/data/export6
Brick3: dagobah:/data/export5
Brick4: dagobah:/data/export4
Brick5: dagobah:/data/export3
Brick6: dagobah:/data/export2
Options Reconfigured:
performance.stat-prefetch: on
features.limit-usage: /:7GB
features.quota: on
performance.read-ahead: on

On a fuse client ran,
for i in `seq 0 6`; do /opt/qa/tools/fs_mark -d . -D 4 -t 4 -N 500 -S $i; done

Removed the /data/export1 directory.

Fuse client crashed with following backtrace:
Core was generated by `/usr/local/sbin/glusterfs --volfile-id=vol --volfile-server=dagobah mount/'.
Program terminated with signal 6, Aborted.
#0  0x00007ff7fae6d3a5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64	../nptl/sysdeps/unix/sysv/linux/raise.c: Transport endpoint is not connected.
	in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) bt
#0  0x00007ff7fae6d3a5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ff7fae70b0b in __GI_abort () at abort.c:92
#2  0x00007ff7fae65d4d in __GI___assert_fail (assertion=0x7ff7f74ef9e1 "0", file=<optimized out>, line=4618, function=<optimized out>)
    at assert.c:81
#3  0x00007ff7f74e1f37 in client3_1_inodelk (frame=0x7ff7fa0885ec, this=0x134e8c0, data=0x7fff5bcbeac0)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4616
#4  0x00007ff7f74c7374 in client_inodelk (frame=0x7ff7fa0885ec, this=0x134e8c0, volume=0x13556d0 "vol-replicate-0", loc=0x7ff7f40cf2fc, 
    cmd=6, lock=0x7fff5bcbec70) at ../../../../../xlators/protocol/client/src/client.c:1592
#5  0x00007ff7f7286a6c in afr_nonblocking_inodelk (frame=0x7ff7f9e82148, this=0x1355990)
    at ../../../../../xlators/cluster/afr/src/afr-lk-common.c:1515
#6  0x00007ff7f7272448 in afr_sh_metadata_lock (frame=0x7ff7f9e82148, this=0x1355990)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-metadata.c:584
#7  0x00007ff7f72724ae in afr_self_heal_metadata (frame=0x7ff7f9e82148, this=0x1355990)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-metadata.c:600
#8  0x00007ff7f726b13c in afr_sh_missing_entries_done (frame=0x7ff7f9e82148, this=0x1355990)
    at ../../../../../xlators/cluster/afr/src/afr-self-heal-common.c:924
#9  0x00007ff7f7281bfc in afr_unlock_common_cbk (frame=0x7ff7f9e82148, cookie=0x1, this=0x1355990, op_ret=0, op_errno=0)
    at ../../../../../xlators/cluster/afr/src/afr-lk-common.c:544
#10 0x00007ff7f7282975 in afr_unlock_entrylk_cbk (frame=0x7ff7f9e82148, cookie=0x1, this=0x1355990, op_ret=0, op_errno=0)
    at ../../../../../xlators/cluster/afr/src/afr-lk-common.c:706
#11 0x00007ff7f74d29bc in client3_1_entrylk_cbk (req=0x7ff7efa88908, iov=0x7ff7efa88948, count=1, myframe=0x7ff7fa088dfc)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:1307
#12 0x00007ff7fb620085 in rpc_clnt_handle_reply (clnt=0x7ff7f00ad710, pollin=0x7ff7f01fae10) at ../../../../rpc/rpc-lib/src/rpc-clnt.c:797
#13 0x00007ff7fb6203fc in rpc_clnt_notify (trans=0x7ff7f00bd240, mydata=0x7ff7f00ad740, event=RPC_TRANSPORT_MSG_RECEIVED, 
    data=0x7ff7f01fae10) at ../../../../rpc/rpc-lib/src/rpc-clnt.c:916
#14 0x00007ff7fb61c1c8 in rpc_transport_notify (this=0x7ff7f00bd240, event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7ff7f01fae10)
    at ../../../../rpc/rpc-lib/src/rpc-transport.c:498
#15 0x00007ff7f8110317 in socket_event_poll_in (this=0x7ff7f00bd240) at ../../../../../rpc/rpc-transport/socket/src/socket.c:1686
#16 0x00007ff7f8110880 in socket_event_handler (fd=9, idx=2, data=0x7ff7f00bd240, poll_in=1, poll_out=0, poll_err=0)
    at ../../../../../rpc/rpc-transport/socket/src/socket.c:1801
#17 0x00007ff7fb87669c in event_dispatch_epoll_handler (event_pool=0x133a380, events=0x1348750, i=0)
    at ../../../libglusterfs/src/event.c:794
#18 0x00007ff7fb8768af in event_dispatch_epoll (event_pool=0x133a380) at ../../../libglusterfs/src/event.c:856
#19 0x00007ff7fb876c22 in event_dispatch (event_pool=0x133a380) at ../../../libglusterfs/src/event.c:956
#20 0x0000000000408076 in main (argc=4, argv=0x7fff5bcbfb78) at ../../../glusterfsd/src/glusterfsd.c:1612
(gdb) f 3
#3  0x00007ff7f74e1f37 in client3_1_inodelk (frame=0x7ff7fa0885ec, this=0x134e8c0, data=0x7fff5bcbeac0)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4616
4616	        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
(gdb) p this
$1 = (xlator_t *) 0x134e8c0
(gdb) p *this
$2 = {name = 0x134f280 "vol-client-0", type = 0x134f370 "protocol/client", next = 0x0, prev = 0x1350170, parents = 0x1356b70, 
  children = 0x0, options = 0x134f2c0, dlhandle = 0x134f440, fops = 0x7ff7f76f6520, cbks = 0x7ff7f76f6500, dumpops = 0x7ff7f76f67c0, 
  volume_options = {next = 0x134fa80, prev = 0x7ff7f00e27c0}, fini = 0x7ff7f74ca5b5 <fini>, init = 0x7ff7f74ca303 <init>, 
  reconfigure = 0x7ff7f74ca130 <reconfigure>, mem_acct_init = 0x7ff7f74c9a70 <mem_acct_init>, notify = 0x7ff7f74c965d <notify>, 
  loglevel = GF_LOG_NONE, latencies = {{min = 0, max = 0, total = 0, std = 0, mean = 0, count = 0} <repeats 46 times>}, history = 0x0, 
  ctx = 0x1322010, graph = 0x134a580, itable = 0x0, init_succeeded = 1 '\001', private = 0x7ff7f00be570, mem_acct = {num_types = 96, 
    rec = 0x7ff7f00bd940}, winds = 0, switched = 0 '\000', local_pool = 0x7ff7f00be670}
(gdb) p *this->options
$3 = {is_static = 0 '\000', hash_size = 1, count = 11, refcount = 0, members = 0x134f330, members_list = 0x7ff7f00e3ca0, extra_free = 0x0, 
  extra_stdfree = 0x0, lock = 1}
(gdb) f 4
#4  0x00007ff7f74c7374 in client_inodelk (frame=0x7ff7fa0885ec, this=0x134e8c0, volume=0x13556d0 "vol-replicate-0", loc=0x7ff7f40cf2fc, 
    cmd=6, lock=0x7fff5bcbec70) at ../../../../../xlators/protocol/client/src/client.c:1592
warning: Source file is more recent than executable.
1592	                ret = proc->fn (frame, this, &args);
(gdb) p ret
$5 = -1
(gdb) f 3
#3  0x00007ff7f74e1f37 in client3_1_inodelk (frame=0x7ff7fa0885ec, this=0x134e8c0, data=0x7fff5bcbeac0)
    at ../../../../../xlators/protocol/client/src/client3_1-fops.c:4616
4616	        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
(gdb) p proc
$7 = (rpc_clnt_procedure_t *) 0x7ff7f76f87f0
(gdb) p *proc
$8 = {procname = 0x7ff7f74efb46 "INODELK", fn = 0x7ff7f74e1dd6 <client3_1_inodelk>}
(gdb) p *proc->fn
$9 = {int (call_frame_t *, xlator_t *, void *)} 0x7ff7f74e1dd6 <client3_1_inodelk>
(gdb) p *(*proc->fn)
$10 = {int (call_frame_t *, xlator_t *, void *)} 0x7ff7f74e1dd6 <client3_1_inodelk>
(gdb) p *(*proc->)fn
A syntax error in expression, near `)fn'.
(gdb) p *(*proc->fn)
$11 = {int (call_frame_t *, xlator_t *, void *)} 0x7ff7f74e1dd6 <client3_1_inodelk>
(gdb) p &args
$12 = (clnt_args_t *) 0x7fff5bcbeac0
(gdb) p args
$13 = {loc = 0x7ff7f40cf2fc, fd = 0x0, xattr_req = 0x0, linkname = 0x0, iobref = 0x0, vector = 0x0, xattr = 0x0, stbuf = 0x0, dict = 0x0, 
  oldloc = 0x0, newloc = 0x0, name = 0x0, flock = 0x7fff5bcbec70, volume = 0x13556d0 "vol-replicate-0", basename = 0x0, offset = 0, 
  mask = 0, cmd = 6, size = 0, mode = 0, rdev = 0, flags = 0, wbflags = 0, count = 0, datasync = 0, cmd_entrylk = ENTRYLK_LOCK, 
  type = ENTRYLK_RDLCK, optype = GF_XATTROP_ADD_ARRAY, valid = 0, len = 0}
(gdb) p args.loc
$14 = (loc_t *) 0x7ff7f40cf2fc
(gdb) p *(args.loc)
$15 = {path = 0x7ff7f02132a0 "/00/4f619625~~~~~~~~ID9P9WDGIH51036O2SXU43K5", 
  name = 0x7ff7f02132a4 "4f619625~~~~~~~~ID9P9WDGIH51036O2SXU43K5", inode = 0x7ff7ef4ed1e0, parent = 0x7ff7ef51489c, 
  gfid = '\000' <repeats 15 times>, pargfid = "W\336,\277\336\063I\251\243\266\362?\353ֆ\023"}

client log:
[2012-03-15 12:47:30.669314] I [afr-common.c:1320:afr_launch_self_heal] 0-vol-replicate-0: background  meta-data data entry missing-entry gfi
d self-heal triggered. path: /, reason: lookup detected pending operations
[2012-03-15 12:47:30.671452] E [afr-self-heal-common.c:1007:afr_sh_common_lookup_resp_handler] 0-vol-replicate-0: path / on subvolume vol-cli
ent-0 => -1 (No such file or directory)
[2012-03-15 12:47:30.675457] I [afr-common.c:1195:afr_detect_self_heal_by_lookup_status] 0-vol-replicate-0: entries are missing in lookup of 
/.
[2012-03-15 12:47:30.675499] I [afr-common.c:1320:afr_launch_self_heal] 0-vol-replicate-0: background  meta-data data entry missing-entry gfi
d self-heal triggered. path: /, reason: lookup detected pending operations
[2012-03-15 12:47:30.677183] E [afr-self-heal-common.c:1007:afr_sh_common_lookup_resp_handler] 0-vol-replicate-0: path / on subvolume vol-cli
ent-0 => -1 (No such file or directory)
[2012-03-15 12:47:30.677267] I [afr-self-heal-entry.c:2332:afr_sh_entry_fix] 0-vol-replicate-0: /: Performing conservative merge
[2012-03-15 12:47:30.677538] E [afr-self-heal-common.c:1007:afr_sh_common_lookup_resp_handler] 0-vol-replicate-0: path / on subvolume vol-cli
ent-0 => -1 (No such file or directory)
[2012-03-15 12:47:30.678099] W [client3_1-fops.c:2100:client3_1_opendir_cbk] 0-vol-client-0: remote operation failed: No such file or directo
ry. Path: /
[2012-03-15 12:47:30.678119] E [afr-self-heal-entry.c:2150:afr_sh_entry_opendir_cbk] 0-vol-replicate-0: opendir of / failed on child vol-clie
nt-0 (No such file or directory)
[2012-03-15 12:47:30.678461] E [afr-self-heal-common.c:2034:afr_self_heal_completion_cbk] 0-vol-replicate-0: background  meta-data data entry
 self-heal failed on /
[2012-03-15 12:47:30.679928] I [afr-common.c:1195:afr_detect_self_heal_by_lookup_status] 0-vol-replicate-0: entries are missing in lookup of 
/00.
[2012-03-15 12:47:30.679954] I [afr-common.c:1320:afr_launch_self_heal] 0-vol-replicate-0: background  meta-data data entry missing-entry gfi
d self-heal triggered. path: /00, reason: lookup detected pending operations
[2012-03-15 12:47:30.680112] E [afr-self-heal-common.c:1007:afr_sh_common_lookup_resp_handler] 0-vol-replicate-0: path / on subvolume vol-cli
ent-0 => -1 (No such file or directory)
[2012-03-15 12:47:30.680136] I [afr-self-heal-entry.c:2332:afr_sh_entry_fix] 0-vol-replicate-0: /: Performing conservative merge
[2012-03-15 12:47:30.680386] I [afr-self-heal-common.c:1821:afr_sh_post_nb_entrylk_conflicting_sh_cbk] 0-vol-replicate-0: Non blocking entrylks failed.
[2012-03-15 12:47:30.680406] I [afr-self-heal-common.c:917:afr_sh_missing_entries_done] 0-vol-replicate-0: split brain found, aborting selfheal of /00
[2012-03-15 12:47:30.680422] E [afr-self-heal-common.c:2034:afr_self_heal_completion_cbk] 0-vol-replicate-0: background  meta-data data entry missing-entry gfid self-heal failed on /00
[2012-03-15 12:47:30.680740] W [client3_1-fops.c:2100:client3_1_opendir_cbk] 0-vol-client-0: remote operation failed: No such file or directory. Path: /
[2012-03-15 12:47:30.680757] E [afr-self-heal-entry.c:2150:afr_sh_entry_opendir_cbk] 0-vol-replicate-0: opendir of / failed on child vol-client-0 (No such file or directory)
[2012-03-15 12:47:30.681046] E [afr-self-heal-common.c:2034:afr_self_heal_completion_cbk] 0-vol-replicate-0: background  meta-data data entry self-heal failed on /
[2012-03-15 12:47:30.797965] I [afr-common.c:1195:afr_detect_self_heal_by_lookup_status] 0-vol-replicate-0: entries are missing in lookup of /00/4f619625~~~~~~~~ID9P9WDGIH51036O2SXU43K5.
[2012-03-15 12:47:30.798013] I [afr-common.c:1320:afr_launch_self_heal] 0-vol-replicate-0: background  meta-data data entry missing-entry gfid self-heal triggered. path: /00/4f619625~~~~~~~~ID9P9WDGIH51036O2SXU43K5, reason: lookup detected pending operations
[2012-03-15 12:47:30.799094] E [afr-self-heal-common.c:1007:afr_sh_common_lookup_resp_handler] 0-vol-replicate-0: path /00 on subvolume vol-client-0 => -1 (No such file or directory)
[2012-03-15 12:47:30.799238] I [afr-self-heal-common.c:1681:afr_sh_find_fresh_parents] 0-vol-replicate-0: Parent dir missing for /00/4f619625~~~~~~~~ID9P9WDGIH51036O2SXU43K5, in missing entry self-heal, aborting missing-entry self-heal
pending frames:
frame : type(1) op(CREATE)
frame : type(1) op(CREATE)
frame : type(1) op(FLUSH)
frame : type(1) op(FLUSH)
frame : type(1) op(WRITE)
frame : type(1) op(LOOKUP)
frame : type(1) op(LOOKUP)
frame : type(1) op(FLUSH)
frame : type(1) op(WRITE)
frame : type(1) op(WRITE)
frame : type(1) op(WRITE)

patchset: git://git.gluster.com/glusterfs.git
signal received: 6
time of crash: 2012-03-15 12:47:30
configuration details:
argp 1
backtrace 1
dlfcn 1
fdatasync 1
libpthread 1
llistxattr 1
setfsid 1
spinlock 1
epoll.h 1
xattr.h 1
st_atim.tv_nsec 1
package-string: glusterfs 3git
/lib/x86_64-linux-gnu/libc.so.6(+0x36420)[0x7ff7fae6d420]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35)[0x7ff7fae6d3a5]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x17b)[0x7ff7fae70b0b]
/lib/x86_64-linux-gnu/libc.so.6(__assert_fail+0xdd)[0x7ff7fae65d4d]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(client3_1_inodelk+0x161)[0x7ff7f74e1f37]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(client_inodelk+0x182)[0x7ff7f74c7374]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_nonblocking_inodelk+0xc79)[0x7ff7f7286a6c]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_sh_metadata_lock+0xb6)[0x7ff7f7272448]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_self_heal_metadata+0x5f)[0x7ff7f72724ae]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(afr_sh_missing_entries_done+0x160)[0x7ff7f726b13c]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(+0x54bfc)[0x7ff7f7281bfc]
/usr/local/lib/glusterfs/3git/xlator/cluster/replicate.so(+0x55975)[0x7ff7f7282975]
/usr/local/lib/glusterfs/3git/xlator/protocol/client.so(client3_1_entrylk_cbk+0x2ba)[0x7ff7f74d29bc]
/usr/local/lib/libgfrpc.so.0(rpc_clnt_handle_reply+0x20e)[0x7ff7fb620085]
/usr/local/lib/libgfrpc.so.0(rpc_clnt_notify+0x2b4)[0x7ff7fb6203fc]
/usr/local/lib/libgfrpc.so.0(rpc_transport_notify+0x115)[0x7ff7fb61c1c8]
/usr/local/lib/glusterfs/3git/rpc-transport/socket.so(socket_event_poll_in+0x54)[0x7ff7f8110317]
/usr/local/lib/glusterfs/3git/rpc-transport/socket.so(socket_event_handler+0x21d)[0x7ff7f8110880]
/usr/local/lib/libglusterfs.so.0(+0x4d69c)[0x7ff7fb87669c]
/usr/local/lib/libglusterfs.so.0(+0x4d8af)[0x7ff7fb8768af]
/usr/local/lib/libglusterfs.so.0(event_dispatch+0x88)[0x7ff7fb876c22]
/usr/local/sbin/glusterfs(main+0x238)[0x408076]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7ff7fae5830d]
/usr/local/sbin/glusterfs[0x403f69]
---------