Hi, During read/write tests to a 78x(16+4) distributed disperse volume from 50 clients, One clients hangs on read/write with the following logs: [2016-04-14 11:11:04.728580] W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-6: Mismatching xdata in answers of 'LOOKUP' [2016-04-14 11:11:04.728624] W [MSGID: 122053] [ec-common.c:116:ec_check_status] 0-v0-disperse-6: Operation failed on some subvolumes (up=FFFFF, mask=FFFFF, remaining=0, good=DFFFF, bad=20000) [2016-04-14 11:11:04.736689] I [MSGID: 122058] [ec-heal.c:2340:ec_heal_do] 0-v0-disperse-6: /workdir/raw_output2: name heal successful on FFFFF [2016-04-14 11:29:26.718036] W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-1: Mismatching xdata in answers of 'LOOKUP' [2016-04-14 11:29:26.718121] W [MSGID: 122053] [ec-common.c:116:ec_check_status] 0-v0-disperse-1: Operation failed on some subvolumes (up=FFFFF, mask=FFFFF, remaining=0, good=EFFFF, bad=10000) [2016-04-14 11:29:42.501760] I [MSGID: 122058] [ec-heal.c:2340:ec_heal_do] 0-v0-disperse-1: /workdir/raw_output2: name heal successful on FFFFF [2016-04-14 11:31:25.714812] E [ec-inode-read.c:1612:ec_manager_stat] (-->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_resume+0x91) [0x7f5ec9f942b1] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(__ec_manager+0x57) [0x7f5ec9f94497] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_manager_stat+0x2c4) [0x7f5ec9faaed4] ) 0-: Assertion failed: ec_get_inode_size(fop, fop->locks[0].lock->loc.inode, &cbk->iatt[0].ia_size) [2016-04-14 11:31:25.722372] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-40: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722411] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-41: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722450] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-44: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722477] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-42: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722503] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-43: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722577] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-45: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722605] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-46: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722742] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-49: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722794] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-47: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722818] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-48: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722840] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-50: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722883] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-52: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722906] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-54: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722958] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-51: remote operation failed [Invalid argument] [2016-04-14 11:31:25.722983] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-55: remote operation failed [Invalid argument] [2016-04-14 11:31:25.723037] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-56: remote operation failed [Invalid argument] [2016-04-14 11:31:25.723045] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-53: remote operation failed [Invalid argument] [2016-04-14 11:31:25.725044] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-59: remote operation failed [Invalid argument] [2016-04-14 11:31:25.741338] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-58: remote operation failed [Invalid argument] [2016-04-14 11:31:25.746602] E [MSGID: 114031] [client-rpc-fops.c:1624:client3_3_inodelk_cbk] 0-v0-client-57: remote operation failed [Invalid argument] [2016-04-14 11:31:25.746629] W [MSGID: 122015] [ec-common.c:1675:ec_unlocked] 0-v0-disperse-2: entry/inode unlocking failed (FSTAT) [Invalid argument] [2016-04-14 11:31:25.746687] E [ec-common.c:1639:ec_lock_unfreeze] (-->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_manager_inodelk+0x2ae) [0x7f5ec9fa009e] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_unlocked+0x40) [0x7f5ec9f97fc0] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_lock_unfreeze+0x91) [0x7f5ec9f975d1] ) 0-: Assertion failed: lock->refs == lock->inserted [2016-04-14 11:31:25.746719] E [ec-common.c:1641:ec_lock_unfreeze] (-->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_manager_inodelk+0x2ae) [0x7f5ec9fa009e] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_unlocked+0x40) [0x7f5ec9f97fc0] -->/usr/lib64/glusterfs/3.7.10/xlator/cluster/disperse.so(ec_lock_unfreeze+0xf2) [0x7f5ec9f97632] ) 0-: Assertion failed: list_empty(&lock->waiting) && list_empty(&lock->owners) [2016-04-14 11:40:54.139418] W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-0: Mismatching xdata in answers of 'LOOKUP' [2016-04-14 11:40:54.139554] W [MSGID: 122053] [ec-common.c:116:ec_check_status] 0-v0-disperse-0: Operation failed on some subvolumes (up=FFFFF, mask=FFFFF, remaining=0, good=2FFFF, bad=D0000) [2016-04-14 11:40:54.143400] I [MSGID: 122058] [ec-heal.c:2340:ec_heal_do] 0-v0-disperse-0: /workdir/raw_output2: name heal successful on FFFFF The message "W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-0: Mismatching xdata in answers of 'LOOKUP'" repeated 2 times between [2016-04-14 11:40:54.139418] and [2016-04-14 11:40:54.139547] [2016-04-14 11:42:31.471317] W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-45: Mismatching xdata in answers of 'LOOKUP' The message "W [MSGID: 122056] [ec-combine.c:866:ec_combine_check] 0-v0-disperse-45: Mismatching xdata in answers of 'LOOKUP'" repeated 8 times between [2016-04-14 11:42:31.471317] and [2016-04-14 11:42:31.471557] Gluster version is 3.7.10 Any thoughts? 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