[GE users] sge_shepherd uses 100% CPU during qrsh 6.2u6

malk271 malcolm.cowe at oracle.com
Mon Nov 8 23:29:24 GMT 2010


On 09/11/2010 09:02, macona wrote:
>> I can confirm this.  It looks like the same nasty bug that we (and
>> perhaps others) have found.
>>
>> A workaround when calling qrsh is to add "-nostdin" to the argument
>> list.
> The "-nostdin" option does not change the behavior for us...
>
>
>> I think that a patch should be available, if you're on support from
>> Oracle.
> Thanks!
>
We've observed a similar issue with 6.2u6. An strace on the shepherd 
process shows the following (in an infinitely repeating cycle until the 
session is closed):

poll([{fd=6, events=POLLIN}, {fd=-1}], 2, 1000) = 1 ([{fd=6, 
revents=POLLHUP}])
wait4(4294967295, 0x7fff95036e2c, WNOHANG, 0x7fff950377d0) = 0
alarm(0)                                = 0
alarm(0)                                = 0
poll([{fd=6, events=POLLIN}, {fd=-1}], 2, 1000) = 1 ([{fd=6, 
revents=POLLHUP}])
wait4(4294967295, 0x7fff95036e2c, WNOHANG, 0x7fff950377d0) = 0
alarm(0)                                = 0
alarm(0)                                = 0
poll([{fd=6, events=POLLIN}, {fd=-1}], 2, 1000) = 1 ([{fd=6, 
revents=POLLHUP}])
wait4(4294967295, 0x7fff95036e2c, WNOHANG, 0x7fff950377d0) = 0
alarm(0)                                = 0
alarm(0)                                = 0
poll([{fd=6, events=POLLIN}, {fd=-1}], 2, 1000) = 1 ([{fd=6, 
revents=POLLHUP}])
wait4(4294967295, 0x7fff95036e2c, WNOHANG, 0x7fff950377d0) = 0
alarm(0)                                = 0
alarm(0)                                = 0
poll([{fd=6, events=POLLIN}, {fd=-1}], 2, 1000) = 1 ([{fd=6, 
revents=POLLHUP}])
wait4(4294967295, 0x7fff95036e2c, WNOHANG, 0x7fff950377d0) = 0

Can't find any matching patches but a colleague has discovered that 
qlogin does not suffer from the same problem.

Malcolm.

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