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From: Davies L. <dav...@gm...> - 2011-11-03 01:47:43
|
Hi，
Found one bug of mfschunkserver, it eats 100% CPU without any activities.
strace shows:
[pid 7754] gettimeofday({1320117856, 191716}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 192052}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 192404}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 192740}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 193063}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 193386}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 193710}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 194033}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
[pid 7754] gettimeofday({1320117856, 194893}, NULL) = 0
[pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN},
{fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224,
events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125,
events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224,
revents=POLLOUT}, {fd=125, revents=POLLOUT}])
It seems that fd 224 and 125 are ready , but it read fd 29 and 222,
with -1, then fall into infinite loop.
--
- Davies
|
|
From: Michał B. <mic...@ge...> - 2011-11-03 13:37:15
|
Hi!
Is this a repeatable problem? Do you know a scenario which causes this behaviour?
Kind regards
Michał Borychowski
MooseFS Support Manager
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Gemius S.A.
ul. Wołoska 7, 02-672 Warszawa
Budynek MARS, klatka D
Tel.: +4822 874-41-00
Fax : +4822 874-41-01
-----Original Message-----
From: Davies Liu [mailto:dav...@gm...]
Sent: Thursday, November 03, 2011 2:47 AM
To: moo...@li...
Subject: [Moosefs-users] mfschunkserver eats 100% CPU
Hi，
Found one bug of mfschunkserver, it eats 100% CPU without any activities.
strace shows:
[pid 7754] gettimeofday({1320117856, 191716}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192052}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192404}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192740}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193063}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193386}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193710}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194033}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194893}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}])
It seems that fd 224 and 125 are ready , but it read fd 29 and 222, with -1, then fall into infinite loop.
--
- Davies
------------------------------------------------------------------------------
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|
From: Davies L. <dav...@gm...> - 2011-11-04 05:51:17
|
2011/11/3 Michał Borychowski <mic...@ge...>:
> Hi!
>
> Is this a repeatable problem? Do you know a scenario which causes this behaviour?
No，I have not see it again.
>
> Kind regards
> Michał Borychowski
> MooseFS Support Manager
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> Gemius S.A.
> ul. Wołoska 7, 02-672 Warszawa
> Budynek MARS, klatka D
> Tel.: +4822 874-41-00
> Fax : +4822 874-41-01
>
>
> -----Original Message-----
> From: Davies Liu [mailto:dav...@gm...]
> Sent: Thursday, November 03, 2011 2:47 AM
> To: moo...@li...
> Subject: [Moosefs-users] mfschunkserver eats 100% CPU
>
> Hi，
>
> Found one bug of mfschunkserver, it eats 100% CPU without any activities.
>
> strace shows:
>
> [pid 7754] gettimeofday({1320117856, 191716}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192052}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192404}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192740}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193063}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193386}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193710}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194033}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194893}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}])
>
> It seems that fd 224 and 125 are ready , but it read fd 29 and 222, with -1, then fall into infinite loop.
>
> --
> - Davies
>
> ------------------------------------------------------------------------------
> RSA(R) Conference 2012
> Save $700 by Nov 18
> Register now
> http://p.sf.net/sfu/rsa-sfdev2dev1
> _______________________________________________
> moosefs-users mailing list
> moo...@li...
> https://lists.sourceforge.net/lists/listinfo/moosefs-users
>
>
--
- Davies
|
|
From: Michał B. <mic...@ge...> - 2011-11-04 12:31:07
|
We are afraid it could rather have been some hardware problem than a bug in software itself. If you encounter it again, please check your hardware or if you could reproduce it, let us know.
Kind regards
Michał Borychowski
MooseFS Support Manager
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Gemius S.A.
ul. Wołoska 7, 02-672 Warszawa
Budynek MARS, klatka D
Tel.: +4822 874-41-00
Fax : +4822 874-41-01
-----Original Message-----
From: Davies Liu [mailto:dav...@gm...]
Sent: Friday, November 04, 2011 6:51 AM
To: Michał Borychowski
Cc: moo...@li...
Subject: Re: [Moosefs-users] mfschunkserver eats 100% CPU
2011/11/3 Michał Borychowski <mic...@ge...>:
> Hi!
>
> Is this a repeatable problem? Do you know a scenario which causes this behaviour?
No，I have not see it again.
>
> Kind regards
> Michał Borychowski
> MooseFS Support Manager
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Gemius S.A.
> ul. Wołoska 7, 02-672 Warszawa
> Budynek MARS, klatka D
> Tel.: +4822 874-41-00
> Fax : +4822 874-41-01
>
>
> -----Original Message-----
> From: Davies Liu [mailto:dav...@gm...]
> Sent: Thursday, November 03, 2011 2:47 AM
> To: moo...@li...
> Subject: [Moosefs-users] mfschunkserver eats 100% CPU
>
> Hi，
>
> Found one bug of mfschunkserver, it eats 100% CPU without any activities.
>
> strace shows:
>
> [pid 7754] gettimeofday({1320117856, 191716}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192052}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192404}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 192740}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193063}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193386}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 193710}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194033}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}]) [pid 7754] gettimeofday({1320117856, 194893}, NULL) = 0 [pid 7754] read(222, 0x7f397c978d08, 408) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] read(29, 0x7f397cad2268, 29368) = -1 EAGAIN (Resource temporarily unavailable) [pid 7754] poll([{fd=12, events=POLLIN}, {fd=11, events=POLLIN}, {fd=6, events=POLLIN}, {fd=9, events=POLLIN}, {fd=224, events=POLLIN|POLLOUT}, {fd=222, events=POLLIN}, {fd=125, events=POLLIN|POLLOUT}, {fd=29, events=POLLIN}], 8, 50) = 2 ([{fd=224, revents=POLLOUT}, {fd=125, revents=POLLOUT}])
>
> It seems that fd 224 and 125 are ready , but it read fd 29 and 222, with -1, then fall into infinite loop.
>
> --
> - Davies
>
> ------------------------------------------------------------------------------
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--
- Davies
------------------------------------------------------------------------------
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Save $700 by Nov 18
Register now
http://p.sf.net/sfu/rsa-sfdev2dev1
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