[Gluster-users] Apache hung tasks still occur with glusterfs 3.2.1

Tue Jun 14 06:29:57 UTC 2011

hello.

do you maybe have already feedback?
was it successfull? (disabled io-cache, disabled stat-prefetch, inreades io-thread count to 64)

is/was your problem similar to this one?
http://bugs.gluster.com/show_bug.cgi?id=3011

thx
christopher

Am 13.06.2011 19:14, schrieb Jiri Lunacek:
> Thanks for the tip. I disabled io-cache and stat-prefetch, increased io-thread-count to 64 and
> rebooted the server to clean off the hung apache processes. We'll see tomorrow.
>
> On 13.6.2011, at 15:58, Justice London wrote:
>
>> Disable io-cache and up the threads to 64 and your problems should disappear. They did for me when
>> I made both of these changes.
>> Justice London
>> *From:*gluster-users-bounces at gluster.org
>> <mailto:gluster-users-bounces at gluster.org>[mailto:gluster-users-bounces at gluster.org]*On Behalf
>> Of*Jiri Lunacek
>> *Sent:*Monday, June 13, 2011 1:49 AM
>> *To:*gluster-users at gluster.org <mailto:gluster-users at gluster.org>
>> *Subject:*[Gluster-users] Apache hung tasks still occur with glusterfs 3.2.1
>> Hi all.
>> We have been having problems with hung tasks of apache reading from glusterfs 2-replica volume
>> ever since upgrading to 3.2.0. The problems were identical to those described here:
>> http://gluster.org/pipermail/gluster-users/2011-May/007697.html
>> Yesterday we updated to 3.2.1.
>> A good thing is that the hung tasks stopped appearing when gluster is in "intact" operation, i.e.
>> when there are no modifications to the gluster configs at all.
>> Today we modified some other volume exported by the same cluster (but not sharing anything with
>> the volume used by the apache process). And, once again, two requests of apache reading from
>> glusterfs volume are stuck.
>> Any help with this issue would be very appreciated as right now we have to nightly-reboot the
>> machine as the processes re stuck in iowait -> unkillable.
>> I really do not want to go through the downgrade to 3.1.4 since it seems from the mailing list
>> that it may not go exactly smooth. We are exporting millions of files and any large operation on
>> the exported filesystem takes days.
>> I am attaching tech info on the problem.
>> client:
>> Centos 5.6
>> 2.6.18-238.9.1.el5
>> fuse-2.7.4-8.el5
>> glusterfs-fuse-3.2.1-1
>> glusterfs-core-3.2.1-1
>> servers:
>> Centos 5.6
>> 2.6.18-194.32.1.el5
>> fuse-2.7.4-8.el5
>> glusterfs-fuse-3.2.1-1
>> glusterfs-core-3.2.1-1
>> dmesg:
>> INFO: task httpd:1246 blocked for more than 120 seconds.
>> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> httpd D ffff81000101d7a0 0 1246 2394 1247 1191 (NOTLB)
>> ffff81013ee7dc38 0000000000000082 0000000000000092 ffff81013ee7dcd8
>> ffff81013ee7dd04 000000000000000a ffff810144d0f7e0 ffff81019fc28100
>> 0000308f8b444727 00000000000014ee ffff810144d0f9c8 000000038006e608
>> Call Trace:
>> [<ffffffff8006ec4e>] do_gettimeofday+0x40/0x90
>> [<ffffffff80028c5a>] sync_page+0x0/0x43
>> [<ffffffff800637ca>] io_schedule+0x3f/0x67
>> [<ffffffff80028c98>] sync_page+0x3e/0x43
>> [<ffffffff8006390e>] __wait_on_bit_lock+0x36/0x66
>> [<ffffffff8003ff27>] __lock_page+0x5e/0x64
>> [<ffffffff800a2921>] wake_bit_function+0x0/0x23
>> [<ffffffff8003fd85>] pagevec_lookup+0x17/0x1e
>> [<ffffffff800cc666>] invalidate_inode_pages2_range+0x73/0x1bd
>> [<ffffffff8004fc94>] finish_wait+0x32/0x5d
>> [<ffffffff884b9798>] :fuse:wait_answer_interruptible+0xb6/0xbd
>> [<ffffffff800a28f3>] autoremove_wake_function+0x0/0x2e
>> [<ffffffff8009a485>] recalc_sigpending+0xe/0x25
>> [<ffffffff8001decc>] sigprocmask+0xb7/0xdb
>> [<ffffffff884bd456>] :fuse:fuse_finish_open+0x36/0x62
>> [<ffffffff884bda11>] :fuse:fuse_open_common+0x147/0x158
>> [<ffffffff884bda22>] :fuse:fuse_open+0x0/0x7
>> [<ffffffff8001eb99>] __dentry_open+0xd9/0x1dc
>> [<ffffffff8002766e>] do_filp_open+0x2a/0x38
>> [<ffffffff8001a061>] do_sys_open+0x44/0xbe
>> [<ffffffff8005d28d>] tracesys+0xd5/0xe0
>> INFO: task httpd:1837 blocked for more than 120 seconds.
>> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> httpd D ffff810001004420 0 1837 2394 1856 1289 (NOTLB)
>> ffff81013c6f9c38 0000000000000086 ffff81013c6f9bf8 00000000fffffffe
>> ffff810170ce7000 000000000000000a ffff81019c0ae7a0 ffffffff80311b60
>> 0000308c0f83d792 0000000000000ec4 ffff81019c0ae988 000000008006e608
>> Call Trace:
>> [<ffffffff8006ec4e>] do_gettimeofday+0x40/0x90
>> [<ffffffff80028c5a>] sync_page+0x0/0x43
>> [<ffffffff800637ca>] io_schedule+0x3f/0x67
>> [<ffffffff80028c98>] sync_page+0x3e/0x43
>> [<ffffffff8006390e>] __wait_on_bit_lock+0x36/0x66
>> [<ffffffff8003ff27>] __lock_page+0x5e/0x64
>> [<ffffffff800a2921>] wake_bit_function+0x0/0x23
>> [<ffffffff8003fd85>] pagevec_lookup+0x17/0x1e
>> [<ffffffff800cc666>] invalidate_inode_pages2_range+0x73/0x1bd
>> [<ffffffff8004fc94>] finish_wait+0x32/0x5d
>> [<ffffffff884b9798>] :fuse:wait_answer_interruptible+0xb6/0xbd
>> [<ffffffff800a28f3>] autoremove_wake_function+0x0/0x2e
>> [<ffffffff8009a485>] recalc_sigpending+0xe/0x25
>> [<ffffffff8001decc>] sigprocmask+0xb7/0xdb
>> [<ffffffff884bd456>] :fuse:fuse_finish_open+0x36/0x62
>> [<ffffffff884bda11>] :fuse:fuse_open_common+0x147/0x158
>> [<ffffffff884bda22>] :fuse:fuse_open+0x0/0x7
>> [<ffffffff8001eb99>] __dentry_open+0xd9/0x1dc
>> [<ffffffff8002766e>] do_filp_open+0x2a/0x38
>> [<ffffffff8001a061>] do_sys_open+0x44/0xbe
>> [<ffffffff8005d28d>] tracesys+0xd5/0xe0
>> INFO: task httpd:383 blocked for more than 120 seconds.
>> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> httpd D ffff81019fa21100 0 383 2394 534 (NOTLB)
>> ffff81013e497c08 0000000000000082 ffff810183eb8910 ffffffff884b9219
>> ffff81019e41c600 0000000000000009 ffff81019b1e2100 ffff81019fa21100
>> 0000308c0e2c2bfb 0000000000016477 ffff81019b1e22e8 000000038006e608
>> Call Trace:
>> [<ffffffff884b9219>] :fuse:flush_bg_queue+0x2b/0x48
>> [<ffffffff8006ec4e>] do_gettimeofday+0x40/0x90
>> [<ffffffff8005a9f9>] getnstimeofday+0x10/0x28
>> [<ffffffff80028c5a>] sync_page+0x0/0x43
>> [<ffffffff800637ca>] io_schedule+0x3f/0x67
>> [<ffffffff80028c98>] sync_page+0x3e/0x43
>> [<ffffffff8006390e>] __wait_on_bit_lock+0x36/0x66
>> [<ffffffff8003ff27>] __lock_page+0x5e/0x64
>> [<ffffffff800a2921>] wake_bit_function+0x0/0x23
>> [<ffffffff8000c48d>] do_generic_mapping_read+0x1df/0x359
>> [<ffffffff8000d279>] file_read_actor+0x0/0x159
>> [<ffffffff8000c753>] __generic_file_aio_read+0x14c/0x198
>> [<ffffffff800c8c45>] generic_file_read+0xac/0xc5
>> [<ffffffff800a28f3>] autoremove_wake_function+0x0/0x2e
>> [<ffffffff80130778>] selinux_file_permission+0x9f/0xb4
>> [<ffffffff8000b78d>] vfs_read+0xcb/0x171
>> [<ffffffff80011d34>] sys_read+0x45/0x6e
>> [<ffffffff8005d28d>] tracesys+0xd5/0xe0
>> possibly relevant log messages:
>> [2011-06-13 09:09:14.985576] W [socket.c:1494:__socket_proto_state_machine] 0-glusterfs: reading
>> from socket failed. Error (Transport endpoint is not connected), peer (81.0.225.122:24007)
>> [2011-06-13 09:09:25.741055] I [glusterfsd-mgmt.c:637:mgmt_getspec_cbk] 0-: No change in volfile,
>> continuing
>> [2011-06-13 09:59:00.644130] I [afr-common.c:639:afr_lookup_self_heal_check] 0-isifa1-replicate-0:
>> size differs for /data/foto/thumbs/3140/31409780.jpg
>> [2011-06-13 09:59:00.644269] I [afr-common.c:801:afr_lookup_done] 0-isifa1-replicate-0: background
>> meta-data data self-heal triggered. path: /data/foto/thumbs/3140/31409780.jpg
>> [2011-06-13 09:59:00.822524] W [dict.c:437:dict_ref]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/protocol/client.so(client3_1_fstat_cbk+0x2cb) [0x2aaaab1afa0b]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/cluster/replicate.so(afr_sh_data_fstat_cbk+0x17d)
>> [0x2aaaab3e4c9d]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/cluster/replicate.so(afr_sh_data_fix+0x1fc)
>> [0x2aaaab3e493c]))) 0-dict: dict is NULL
>> [2011-06-13 09:59:00.824323] I [afr-common.c:639:afr_lookup_self_heal_check] 0-isifa1-replicate-0:
>> size differs for /data/foto/thumbs/3140/31409781.jpg
>> [2011-06-13 09:59:00.824356] I [afr-common.c:801:afr_lookup_done] 0-isifa1-replicate-0: background
>> meta-data data self-heal triggered. path: /data/foto/thumbs/3140/31409781.jpg
>> [2011-06-13 09:59:00.826494] I [afr-self-heal-common.c:1557:afr_self_heal_completion_cbk]
>> 0-isifa1-replicate-0: background meta-data data self-heal completed on
>> /data/foto/thumbs/3140/31409780.jpg
>> [2011-06-13 09:59:00.830902] W [dict.c:437:dict_ref]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/protocol/client.so(client3_1_fstat_cbk+0x2cb) [0x2aaaab1afa0b]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/cluster/replicate.so(afr_sh_data_fstat_cbk+0x17d)
>> [0x2aaaab3e4c9d]
>> (-->/opt/glusterfs/3.2.1/lib64/glusterfs/3.2.1/xlator/cluster/replicate.so(afr_sh_data_fix+0x1fc)
>> [0x2aaaab3e493c]))) 0-dict: dict is NULL
>> gluster-server volume config:
>> volume isifa1-posix
>> type storage/posix
>> option directory /mnt/data/isifa1
>> end-volume
>> volume isifa1-access-control
>> type features/access-control
>> subvolumes isifa1-posix
>> end-volume
>> volume isifa1-locks
>> type features/locks
>> subvolumes isifa1-access-control
>> end-volume
>> volume isifa1-io-threads
>> type performance/io-threads
>> subvolumes isifa1-locks
>> end-volume
>> volume isifa1-marker
>> type features/marker
>> option volume-uuid 39d5c509-ad39-4b24-a272-c33e212cf912
>> option timestamp-file /etc/glusterd/vols/isifa1/marker.tstamp
>> option xtime off
>> option quota off
>> subvolumes isifa1-io-threads
>> end-volume
>> volume /mnt/data/isifa1
>> type debug/io-stats
>> option latency-measurement off
>> option count-fop-hits off
>> subvolumes isifa1-marker
>> end-volume
>> volume isifa1-server
>> type protocol/server
>> option transport-type tcp
>> option auth.addr./mnt/data/isifa1.allow
>> 81.0.225.120,81.0.225.121,81.0.225.90,81.0.225.117,81.0.225.118,82.208.17.113
>> subvolumes /mnt/data/isifa1
>> end-volume
>> gluster-fuse config:
>> volume isifa1-client-0
>> type protocol/client
>> option remote-host isifa-data1
>> option remote-subvolume /mnt/data/isifa1
>> option transport-type tcp
>> end-volume
>> volume isifa1-client-1
>> type protocol/client
>> option remote-host isifa-data2
>> option remote-subvolume /mnt/data/isifa1
>> option transport-type tcp
>> end-volume
>> volume isifa1-replicate-0
>> type cluster/replicate
>> subvolumes isifa1-client-0 isifa1-client-1
>> end-volume
>> volume isifa1-write-behind
>> type performance/write-behind
>> subvolumes isifa1-replicate-0
>> end-volume
>> volume isifa1-read-ahead
>> type performance/read-ahead
>> subvolumes isifa1-write-behind
>> end-volume
>> volume isifa1-io-cache
>> type performance/io-cache
>> subvolumes isifa1-read-ahead
>> end-volume
>> volume isifa1-quick-read
>> type performance/quick-read
>> subvolumes isifa1-io-cache
>> end-volume
>> volume isifa1-stat-prefetch
>> type performance/stat-prefetch
>> subvolumes isifa1-quick-read
>> end-volume
>> volume isifa1
>> type debug/io-stats
>> option latency-measurement off
>> option count-fop-hits off
>> subvolumes isifa1-stat-prefetch
>> end-volume
>
>
>
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-- 

Mag. Christopher Anderlik
Leiter Technik

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