grep sometimes hang on 1.7.25

grep sometimes hang on 1.7.25

[Marcin J.]

This isnt grep problem, `ps | cat` will hang too.

I have up to date cygwin 1.7.27 x86_64

 




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Re: grep sometimes hang on 1.7.25

[cygwin]

Marcin J. wrote at about 02:00:00 +0100 on Sunday, December 15, 2013:
 > 
 > This isnt grep problem, `ps | cat` will hang too.
 > 
 > I have up to date cygwin 1.7.27 x86_64
 > 

Ah.... any idea what might be causing this

(actually, I realize that I have 1.7.27 too -- I just hadn't realized
that it updated...)

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Re: grep sometimes hang on 1.7.25

[Christopher Faylor]

On Sun, Dec 15, 2013 at 02:00:00AM +0100, Marcin J. wrote:
> `ps | cat` will hang too.

I can duplicate this problem.  I'm looking into it.

cgf

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Re: grep sometimes hang on 1.7.25

[Christopher Faylor]

On Mon, Dec 16, 2013 at 03:39:26PM -0500, Christopher Faylor wrote:
>On Sun, Dec 15, 2013 at 02:00:00AM +0100, Marcin J. wrote:
>> `ps | cat` will hang too.
>
>I can duplicate this problem.  I'm looking into it.

This should be fixed in the upcoming cygwin snapshot.

http://cygwin.com/snapshots/

What a pain that was to track down...

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Re: grep sometimes hang on 1.7.25

[Christopher Faylor]

On Tue, Dec 17, 2013 at 10:59:13PM -0500, Christopher Faylor wrote:
>On Mon, Dec 16, 2013 at 03:39:26PM -0500, Christopher Faylor wrote:
>>On Sun, Dec 15, 2013 at 02:00:00AM +0100, Marcin J. wrote:
>>> `ps | cat` will hang too.
>>
>>I can duplicate this problem.  I'm looking into it.
>
>This should be fixed in the upcoming cygwin snapshot.
>
>http://cygwin.com/snapshots/
>
>What a pain that was to track down...

!#@($&  Nevermind.  The hang should be gone but the ps output is still
wrong.

Still checking.

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Re: grep sometimes hang on 1.7.25

[Christopher Faylor]

On Tue, Dec 17, 2013 at 11:02:21PM -0500, Christopher Faylor wrote:
>On Tue, Dec 17, 2013 at 10:59:13PM -0500, Christopher Faylor wrote:
>>On Mon, Dec 16, 2013 at 03:39:26PM -0500, Christopher Faylor wrote:
>>>On Sun, Dec 15, 2013 at 02:00:00AM +0100, Marcin J. wrote:
>>>> `ps | cat` will hang too.
>>>
>>>I can duplicate this problem.  I'm looking into it.
>>
>>This should be fixed in the upcoming cygwin snapshot.
>>
>>http://cygwin.com/snapshots/
>>
>>What a pain that was to track down...
>
>!#@($&  Nevermind.  The hang should be gone but the ps output is still
>wrong.
>
>Still checking.

Ok, now it should really be fixed.

cgf

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grep sometimes hang on 1.7.25

[cygwin]

For some combinations of grep on 1.7.25, a simple grep statement can
take 20-30 seconds.

For example, the operation 'ps -el' completes almost instantaneously.
Yet seemingly randomly the operation 'ps -el | grep <string>' often
takes 30 seconds -- actually it seems to either return instantaneously
or take 30 seconds. It doesn't seem to make a difference whether the
<string> actually occurs in the output of 'ps -el'

In particular, I initially found the problem with <string>=rsync
But it seems to happen with reasonable frequency with many other strings.
However, it is not reliably repeatable...

Any idea what may be wrong here?

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