Re: Gluster 3.7.13 NFS Crash

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appreciate your help,

(gdb) frame 2
#2  0x00007f195deb1787 in shard_common_inode_write_do (frame=0x7f19699f1164, this=0x7f195802ac10) at shard.c:3716
3716                        anon_fd = fd_anonymous (local->inode_list[i]);
(gdb) p local->inode_list[0]
$4 = (inode_t *) 0x7f195c532b18
(gdb) p local->inode_list[1]
$5 = (inode_t *) 0x0
(gdb) 


--

Respectfully
Mahdi A. Mahdi



From: kdhananj@xxxxxxxxxx
Date: Thu, 4 Aug 2016 12:43:10 +0530
Subject: Re: Gluster 3.7.13 NFS Crash
To: mahdi.adnan@xxxxxxxxxxx
CC: gluster-users@xxxxxxxxxxx

OK.
Could you also print the values of the following variables from the original core:
i. i
ii. local->inode_list[0]
iii. local->inode_list[1]

-Krutika

On Wed, Aug 3, 2016 at 9:01 PM, Mahdi Adnan <mahdi.adnan@xxxxxxxxxxx> wrote:
Hi,

Unfortunately no, but i can setup a test bench and see if it gets the same results.

--

Respectfully
Mahdi A. Mahdi



From: kdhananj@xxxxxxxxxx
Date: Wed, 3 Aug 2016 20:59:50 +0530

Subject: Re: Gluster 3.7.13 NFS Crash
To: mahdi.adnan@xxxxxxxxxxx
CC: gluster-users@xxxxxxxxxxx

Do you have a test case that consistently recreates this problem?

-Krutika

On Wed, Aug 3, 2016 at 8:32 PM, Mahdi Adnan <mahdi.adnan@xxxxxxxxxxx> wrote:
Hi,

 So i have updated to 3.7.14 and i still have the same issue with NFS.
based on what i have provided so far from logs and dumps do you think it's an NFS issue ? should i switch to nfs-ganesha ?
the problem is, the current setup is used in a production environment, and switching the mount point of  +50 VMs from native nfs to nfs-ganesha is not going to be smooth and without downtime, so i really appreciate your thoughts on this matter.

--

Respectfully
Mahdi A. Mahdi



From: mahdi.adnan@xxxxxxxxxxx
To: kdhananj@xxxxxxxxxx
Date: Tue, 2 Aug 2016 08:44:16 +0300

CC: gluster-users@xxxxxxxxxxx
Subject: Re: Gluster 3.7.13 NFS Crash

Hi,

The NFS just crashed again, latest bt;

(gdb) bt
#0  0x00007f0b71a9f210 in pthread_spin_lock () from /lib64/libpthread.so.0
#1  0x00007f0b72c6fcd5 in fd_anonymous (inode=0x0) at fd.c:804
#2  0x00007f0b64ca5787 in shard_common_inode_write_do (frame=0x7f0b707c062c, this=0x7f0b6002ac10) at shard.c:3716
#3  0x00007f0b64ca5a53 in shard_common_inode_write_post_lookup_shards_handler (frame=<optimized out>, this=<optimized out>) at shard.c:3769
#4  0x00007f0b64c9eff5 in shard_common_lookup_shards_cbk (frame=0x7f0b707c062c, cookie=<optimized out>, this=0x7f0b6002ac10, op_ret=0, 
    op_errno=<optimized out>, inode=<optimized out>, buf=0x7f0b51407640, xdata=0x7f0b72f57648, postparent=0x7f0b514076b0) at shard.c:1601
#5  0x00007f0b64efe141 in dht_lookup_cbk (frame=0x7f0b7075fcdc, cookie=<optimized out>, this=<optimized out>, op_ret=0, op_errno=0, inode=0x7f0b5f1d1f58, 
    stbuf=0x7f0b51407640, xattr=0x7f0b72f57648, postparent=0x7f0b514076b0) at dht-common.c:2174
#6  0x00007f0b651871f3 in afr_lookup_done (frame=frame@entry=0x7f0b7079a4c8, this=this@entry=0x7f0b60023ba0) at afr-common.c:1825
#7  0x00007f0b65187b84 in afr_lookup_metadata_heal_check (frame=frame@entry=0x7f0b7079a4c8, this=0x7f0b60023ba0, this@entry=0xca0bd88259f5a800)
    at afr-common.c:2068
#8  0x00007f0b6518834f in afr_lookup_entry_heal (frame=frame@entry=0x7f0b7079a4c8, this=0xca0bd88259f5a800, this@entry=0x7f0b60023ba0) at afr-common.c:2157
#9  0x00007f0b6518867d in afr_lookup_cbk (frame=0x7f0b7079a4c8, cookie=<optimized out>, this=0x7f0b60023ba0, op_ret=<optimized out>, 
    op_errno=<optimized out>, inode=<optimized out>, buf=0x7f0b564e9940, xdata=0x7f0b72f708c8, postparent=0x7f0b564e99b0) at afr-common.c:2205
#10 0x00007f0b653d6e42 in client3_3_lookup_cbk (req=<optimized out>, iov=<optimized out>, count=<optimized out>, myframe=0x7f0b7076354c)
    at client-rpc-fops.c:2981
#11 0x00007f0b72a00a30 in rpc_clnt_handle_reply (clnt=clnt@entry=0x7f0b603393c0, pollin=pollin@entry=0x7f0b50c1c2d0) at rpc-clnt.c:764
#12 0x00007f0b72a00cef in rpc_clnt_notify (trans=<optimized out>, mydata=0x7f0b603393f0, event=<optimized out>, data="" at rpc-clnt.c:925
#13 0x00007f0b729fc7c3 in rpc_transport_notify (this=this@entry=0x7f0b60349040, event=event@entry=RPC_TRANSPORT_MSG_RECEIVED, data="">0x7f0b50c1c2d0)
    at rpc-transport.c:546
#14 0x00007f0b678c39a4 in socket_event_poll_in (this=this@entry=0x7f0b60349040) at socket.c:2353
#15 0x00007f0b678c65e4 in socket_event_handler (fd=fd@entry=29, idx=idx@entry=17, data="" poll_in=1, poll_out=0, poll_err=0) at socket.c:2466
#16 0x00007f0b72ca0f7a in event_dispatch_epoll_handler (event=0x7f0b564e9e80, event_pool=0x7f0b7349bf20) at event-epoll.c:575
#17 event_dispatch_epoll_worker (data="" at event-epoll.c:678
#18 0x00007f0b71a9adc5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f0b713dfced in clone () from /lib64/libc.so.6


--

Respectfully
Mahdi A. Mahdi

From: mahdi.adnan@xxxxxxxxxxx
To: kdhananj@xxxxxxxxxx
Date: Mon, 1 Aug 2016 16:31:50 +0300
CC: gluster-users@xxxxxxxxxxx
Subject: Re: [Gluster-users] Gluster 3.7.13 NFS Crash

Many thanks,

here's the results;


(gdb) p cur_block
$15 = 4088
(gdb) p last_block
$16 = 4088
(gdb) p local->first_block
$17 = 4087
(gdb) p odirect
$18 = _gf_false
(gdb) p fd->flags
$19 = 2
(gdb) p local->call_count
$20 = 2


If you need more core dumps, i have several files i can upload.

--

Respectfully
Mahdi A. Mahdi



From: kdhananj@xxxxxxxxxx
Date: Mon, 1 Aug 2016 18:39:27 +0530
Subject: Re: Gluster 3.7.13 NFS Crash
To: mahdi.adnan@xxxxxxxxxxx
CC: gluster-users@xxxxxxxxxxx

Sorry I didn't make myself  clear. The reason I asked YOU to do it is because i tried it on my system and im not getting the backtrace (it's all question marks).

Attach the core to gdb.
At the gdb prompt, go to frame 2 by typing
(gdb) f 2

There, for each of the variables i asked you to get the values of, type p followed by the variable name.
For instance, to get the value of the variable 'odirect', do this:

(gdb) p odirect

and gdb will print its value for you in response.

-Krutika

On Mon, Aug 1, 2016 at 4:55 PM, Mahdi Adnan <mahdi.adnan@xxxxxxxxxxx> wrote:
Hi,

How to get the results of the below variables ? i cant get the results from gdb.


--

Respectfully
Mahdi A. Mahdi



From: kdhananj@xxxxxxxxxx
Date: Mon, 1 Aug 2016 15:51:38 +0530
Subject: Re: Gluster 3.7.13 NFS Crash
To: mahdi.adnan@xxxxxxxxxxx
CC: gluster-users@xxxxxxxxxxx


Could you also print and share the values of the following variables from the backtrace please:

i. cur_block
ii. last_block
iii. local->first_block
iv. odirect
v. fd->flags
vi. local->call_count

-Krutika

On Sat, Jul 30, 2016 at 5:04 PM, Mahdi Adnan <mahdi.adnan@xxxxxxxxxxx> wrote:
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="">0x7f195907f930)
    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;


thanks in advance.

Respectfully
Mahdi A. Mahdi


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