Re: Automounter hangs...

[Ondrej Valousek <webserv@s3group.cz>]

> Seems that the expire is completing before the parent signals are
> restored. But I thought a signal that is sent while it is blocked
> (SIGCHLD in this case) is delivered once the signal is unblocked so this
> is a bit of a puzzle.
>
>   
And which game plays the process 18848 here - this is the first one to
hang (looks like)....

Nov 20 15:02:39 login02 automount[18848]: lookup(yp): looking up .directory
Nov 20 15:02:39 login02 automount[18848]: failed to mount /proj/.directory
Nov 20 15:02:39 login02 automount[18848]: umount_multi:
path=/proj/.directory incl=1
Nov 20 15:02:39 login02 automount[4125]: handle_child: got pid 18848,
sig 0 (0), stat 1
Nov 20 15:02:39 login02 automount[4125]: sig_child: found pending iop
pid 18848: signalled 0 (sig 0), exit status 1
Nov 21 15:07:55 login02 automount[18848]: lookup(yp): looking up .raw_data
Nov 21 15:07:55 login02 automount[18848]: failed to mount /proj/.raw_data
Nov 21 15:07:55 login02 automount[18848]: umount_multi:
path=/proj/.raw_data incl=1
Nov 21 15:07:55 login02 automount[4125]: handle_child: got pid 18848,
sig 0 (0), stat 1
Nov 21 15:07:55 login02 automount[4125]: sig_child: found pending iop
pid 18848: signalled 0 (sig 0), exit status 1

>> Ondrej
>>
>>     
>>> Hi All,
>>>
>>> I hoped this went away forever, but I was wrong (unfortunately). Here we
>>> go again:
>>> RHEL-4, full updates, autofs 4, automounter hangs:
>>> ps -ef | grep auto:
>>> root      3805     1  0 Nov21 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /softappli yp
>>> auto.softappli -rw
>>> root      3880     1  0 Nov21 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /cadappl yp auto.cadappl -rw
>>> root      3947     1  0 Nov21 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /appli yp auto.appli -rw
>>> root      4032     1  0 Nov21 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /proj yp auto.proj -rw
>>> root      4118     1  0 Nov21 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /home yp auto.home -rw
>>> root     18848  4032  0 Nov27 ?        00:00:00 /usr/sbin/automount
>>> --timeout=3600 --debug --use-old-ldap-lookup /proj yp auto.proj -rw
>>> root     18851  4032  0 Nov27 ?        00:00:00 [automount] <defunct>
>>> root     28454 21820  0 15:25 pts/134  00:00:00 grep auto
>>>
>>> Debug logs:
>>> Nov 27 13:07:28 login02 automount[4032]: sig 14 switching from 1 to 2
>>> Nov 27 13:07:28 login02 automount[4032]: get_pkt: state 1, next 2
>>> Nov 27 13:07:28 login02 automount[4032]: st_expire(): state = 1
>>> Nov 27 13:07:28 login02 automount[4032]: expire_proc: exp_proc=18848
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet: type = 2
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet_expire_multi:
>>> token 7150, name towerip
>>> Nov 27 13:07:28 login02 automount[18849]: expiring path /proj/towerip
>>> Nov 27 13:07:28 login02 automount[18849]: umount_multi:
>>> path=/proj/towerip incl=1
>>> Nov 27 13:07:28 login02 automount[18849]: umount_multi: unmounting
>>> dir=/proj/towerip
>>> Nov 27 13:07:28 login02 automount[18849]: expired /proj/towerip
>>> Nov 27 13:07:28 login02 automount[4032]: handle_child: got pid 18849,
>>> sig 0 (0), stat 0
>>> Nov 27 13:07:28 login02 automount[4032]: sig_child: found pending iop
>>> pid 18849: signalled 0 (sig 0), exit status 0
>>> Nov 27 13:07:28 login02 automount[4032]: send_ready: token=7150
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet: type = 2
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet_expire_multi:
>>> token 7151, name pdld4
>>> Nov 27 13:07:28 login02 automount[18851]: expiring path /proj/pdld4
>>> Nov 27 13:07:28 login02 automount[18851]: umount_multi: path=/proj/pdld4
>>> incl=1
>>> Nov 27 13:07:28 login02 automount[18851]: umount_multi: unmounting
>>> dir=/proj/pdld4
>>> Nov 27 13:07:28 login02 automount[18851]: expired /proj/pdld4
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet: type = 0
>>> Nov 27 13:07:28 login02 automount[4032]: handle_packet_missing: token
>>> 7152, name towerip
>>>
>>> The automounter daemon handling the /proj map stalled.
>>> Please help.
>>> Thanks,
>>>
>>> Ondrej
>>>
>>> Ondrej Valousek wrote:
>>>       
>>>> Hi Jeff,
>>>>
>>>> Yes I am trying to reproduce this with the debug enabled - it will take
>>>> some time.
>>>> Please stay tuned.
>>>>
>>>> Ondrej
>>>>
>>>>         
>>>>> It rings a bell, but I can't put my finger on it.  Can you reproduce
>>>>> this?  If so, could you send along a debug log?  Instructions for
>>>>> collecting debug information can be found at:
>>>>>   http://people.redhat.com/~jmoyer/
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Jeff
>>>>>
>>>>>
>>>>>           
>>>>
>>>>         
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>>> http://linux.kernel.org/mailman/listinfo/autofs
>>>
>>>       
>>
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