Gluster 3.7.13 NFS Crash

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Hi,

I really appreciate if someone can help me fix my nfs crash, its happening a lot and it's causing lots of issues to my VMs;
the problem is every few hours the native nfs crash and the volume become unavailable from the affected node unless i restart glusterd.
the volume is used by vmware esxi as a datastore for it's VMs with the following options;


OS: CentOS 7.2
Gluster: 3.7.13

Volume Name: vlm01
Type: Distributed-Replicate
Volume ID: eacd8248-dca3-4530-9aed-7714a5a114f2
Status: Started
Number of Bricks: 7 x 3 = 21
Transport-type: tcp
Bricks:
Brick1: gfs01:/bricks/b01/vlm01
Brick2: gfs02:/bricks/b01/vlm01
Brick3: gfs03:/bricks/b01/vlm01
Brick4: gfs01:/bricks/b02/vlm01
Brick5: gfs02:/bricks/b02/vlm01
Brick6: gfs03:/bricks/b02/vlm01
Brick7: gfs01:/bricks/b03/vlm01
Brick8: gfs02:/bricks/b03/vlm01
Brick9: gfs03:/bricks/b03/vlm01
Brick10: gfs01:/bricks/b04/vlm01
Brick11: gfs02:/bricks/b04/vlm01
Brick12: gfs03:/bricks/b04/vlm01
Brick13: gfs01:/bricks/b05/vlm01
Brick14: gfs02:/bricks/b05/vlm01
Brick15: gfs03:/bricks/b05/vlm01
Brick16: gfs01:/bricks/b06/vlm01
Brick17: gfs02:/bricks/b06/vlm01
Brick18: gfs03:/bricks/b06/vlm01
Brick19: gfs01:/bricks/b07/vlm01
Brick20: gfs02:/bricks/b07/vlm01
Brick21: gfs03:/bricks/b07/vlm01
Options Reconfigured:
performance.readdir-ahead: off
performance.quick-read: off
performance.read-ahead: off
performance.io-cache: off
performance.stat-prefetch: off
cluster.eager-lock: enable
network.remote-dio: enable
cluster.quorum-type: auto
cluster.server-quorum-type: server
performance.strict-write-ordering: on
performance.write-behind: off
cluster.data-self-heal-algorithm: full
cluster.self-heal-window-size: 128
features.shard-block-size: 16MB
features.shard: on
auth.allow: 192.168.221.50,192.168.221.51,192.168.221.52,192.168.221.56,192.168.208.130,192.168.208.131,192.168.208.132,192.168.208.89,192.168.208.85,192.168.208.208.86
network.ping-timeout: 10


latest bt;


(gdb) bt 
#0  0x00007f196acab210 in pthread_spin_lock () from /lib64/libpthread.so.0
#1  0x00007f196be7bcd5 in fd_anonymous (inode=0x0) at fd.c:804
#2  0x00007f195deb1787 in shard_common_inode_write_do (frame=0x7f19699f1164, this=0x7f195802ac10) at shard.c:3716
#3  0x00007f195deb1a53 in shard_common_inode_write_post_lookup_shards_handler (frame=<optimized out>, this=<optimized out>) at shard.c:3769
#4  0x00007f195deaaff5 in shard_common_lookup_shards_cbk (frame=0x7f19699f1164, cookie=<optimized out>, this=0x7f195802ac10, op_ret=0, 
    op_errno=<optimized out>, inode=<optimized out>, buf=0x7f194970bc40, xdata=0x7f196c15451c, postparent=0x7f194970bcb0) at shard.c:1601
#5  0x00007f195e10a141 in dht_lookup_cbk (frame=0x7f196998e7d4, cookie=<optimized out>, this=<optimized out>, op_ret=0, op_errno=0, inode=0x7f195c532b18, 
    stbuf=0x7f194970bc40, xattr=0x7f196c15451c, postparent=0x7f194970bcb0) at dht-common.c:2174
#6  0x00007f195e3931f3 in afr_lookup_done (frame=frame@entry=0x7f196997f8a4, this=this@entry=0x7f1958022a20) at afr-common.c:1825
#7  0x00007f195e393b84 in afr_lookup_metadata_heal_check (frame=frame@entry=0x7f196997f8a4, this=0x7f1958022a20, this@entry=0xe3a929e0b67fa500)
    at afr-common.c:2068
#8  0x00007f195e39434f in afr_lookup_entry_heal (frame=frame@entry=0x7f196997f8a4, this=0xe3a929e0b67fa500, this@entry=0x7f1958022a20) at afr-common.c:2157
#9  0x00007f195e39467d in afr_lookup_cbk (frame=0x7f196997f8a4, cookie=<optimized out>, this=0x7f1958022a20, op_ret=<optimized out>, 
    op_errno=<optimized out>, inode=<optimized out>, buf=0x7f195effa940, xdata=0x7f196c1853b0, postparent=0x7f195effa9b0) at afr-common.c:2205
#10 0x00007f195e5e2e42 in client3_3_lookup_cbk (req=<optimized out>, iov=<optimized out>, count=<optimized out>, myframe=0x7f196999952c)
    at client-rpc-fops.c:2981
#11 0x00007f196bc0ca30 in rpc_clnt_handle_reply (clnt=clnt@entry=0x7f19583adaf0, pollin=pollin@entry=0x7f195907f930) at rpc-clnt.c:764
#12 0x00007f196bc0ccef in rpc_clnt_notify (trans=<optimized out>, mydata=0x7f19583adb20, event=<optimized out>, data="" at rpc-clnt.c:925
#13 0x00007f196bc087c3 in rpc_transport_notify (this=this@entry=0x7f19583bd770, event=event@entry=RPC_TRANSPORT_MSG_RECEIVED, data="">
    at rpc-transport.c:546
#14 0x00007f1960acf9a4 in socket_event_poll_in (this=this@entry=0x7f19583bd770) at socket.c:2353
#15 0x00007f1960ad25e4 in socket_event_handler (fd=fd@entry=25, idx=idx@entry=14, data="" poll_in=1, poll_out=0, poll_err=0) at socket.c:2466
#16 0x00007f196beacf7a in event_dispatch_epoll_handler (event=0x7f195effae80, event_pool=0x7f196dbf5f20) at event-epoll.c:575
#17 event_dispatch_epoll_worker (data="" at event-epoll.c:678
#18 0x00007f196aca6dc5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f196a5ebced in clone () from /lib64/libc.so.6




nfs logs and the core dump can be found in the dropbox link below;
https://db.tt/rZrC9d7f


thanks in advance.

Respectfully
Mahdi A. Mahdi


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