OSProcess command - non responding image when calling often

2016-06-09 15:42 GMT+02:00 Sabine Manaa <[hidden email]>:

Hi

@mariano: 

"Did you test if the one-liner (Delay delaySchedulerClass: DelayMillisecondScheduler.)  fixes these lookups? "

-> my config loads materialDesignLite (which loads seaside and magritte). after loading this

and trying the one liner, my image does not respond anymore.

you can reproduce it when taking a new image and loading material design lite 

(no catalog entry yet)

Gofer new

    url: 'http://smalltalkhub.com/mc/KevinLanvin/MaterialDesignLite/main'  ;

    package: 'ConfigurationOfMaterialDesignLite';

    load.

((Smalltalk at: #ConfigurationOfMaterialDesignLite) project version: #development) load. 

(proceed at the deprecated warnings for subString:)

then try the one liner. Image does not respond anymore.

I think there is a running ZnServer, that does not like this change on the delay class.

Can you stop (terminate) the server and try again the change on the Delay scheduler class.

@ben, do you think the call to the scheduler class change needs another step to make sure no process (like the ZnServer) is hanging?

 

 

@Paul, I took a new image, I loaded OSProcess from catalog browser and did the change.

  

| aio |

(aio := Smalltalk at: #AioEventHandler)

ifNotNil: [ aio startUp: resuming ].

OSProcessAccessor initialize.

"resuming ifTrue: [" self initializeThisOSProcess "]" (problem persists with and without code in ")

20 timesRepeat: [OSProcess  command: ('echo "Hi there"').] 

No - the problem persists.

I will stay at pharo4 for several weeks and the try again. 

If I can help fixing the problem I will do - please tell me what to do.

Regards

Sabine 

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NAML

Hi Nicolai,

Thanks! I stopped all ZnServers with 

WAServerManager default stopAll. 

Then I can do

Delay delaySchedulerClass: DelayMillisecondScheduler.

without problems.

20 timesRepeat: [OSProcess  command: ('echo "Hi there"').] .

here, the problem persists -> locking image

your code with OSSubprocess is working fine.

@Mariano: it seems to be another problem with the locks in OSProcess because after changing the delaySchedulerClass, I get locking images with the OSProcess command: ....

Regards

Sabine

 

2016-06-09 19:13 GMT+02:00 Nicolai Hess-3-2 [via Smalltalk] <[hidden email]>:

2016-06-09 15:42 GMT+02:00 Sabine Manaa <[hidden email]>:

Hi

@mariano: 

"Did you test if the one-liner (Delay delaySchedulerClass: DelayMillisecondScheduler.)  fixes these lookups? "

-> my config loads materialDesignLite (which loads seaside and magritte). after loading this

and trying the one liner, my image does not respond anymore.

you can reproduce it when taking a new image and loading material design lite 

(no catalog entry yet)

Gofer new

    url: 'http://smalltalkhub.com/mc/KevinLanvin/MaterialDesignLite/main'  ;

    package: 'ConfigurationOfMaterialDesignLite';

    load.

((Smalltalk at: #ConfigurationOfMaterialDesignLite) project version: #development) load. 

(proceed at the deprecated warnings for subString:)

then try the one liner. Image does not respond anymore.

I think there is a running ZnServer, that does not like this change on the delay class.

Can you stop (terminate) the server and try again the change on the Delay scheduler class.

@ben, do you think the call to the scheduler class change needs another step to make sure no process (like the ZnServer) is hanging?

 

 

@Paul, I took a new image, I loaded OSProcess from catalog browser and did the change.

  

| aio |

(aio := Smalltalk at: #AioEventHandler)

ifNotNil: [ aio startUp: resuming ].

OSProcessAccessor initialize.

"resuming ifTrue: [" self initializeThisOSProcess "]" (problem persists with and without code in ")

20 timesRepeat: [OSProcess  command: ('echo "Hi there"').] 

No - the problem persists.

I will stay at pharo4 for several weeks and the try again. 

If I can help fixing the problem I will do - please tell me what to do.

Regards

Sabine 

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NAML

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View this message in context: Re: OSProcess command - non responding image when calling often
Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Hi Sabine,

I had a Pharo 5 image where running

OSProcess waitForCommand:'ls'

twice would lock everything up.

Following Gaston's suggestion here:

http://forum.world.st/Problem-with-delay-waiting-OSSubprocess-code-on-Pharo-5-0-td4895780.html#a4898158

Fixed it for me.  Maybe we hit the same issue.


Paul


Sabine Manaa wrote

> Hi,
>
> sorry but I have another issue with OSProcess.
>
> For my app, I want to show small .png previews from my .pdfs. For this
> reason, I use an external software, currently pdfbox. It works fine, but
> regularly, I get a hanging image. I tried to reproduce it and found out,
> that it is not a problem with pdfbox (http://pdfbox.apache.org), because
> from command line, I can call it often without problems. There can be
> (hopefully) many users in my app with many previews at one time. So I have
> to call it often.
>
> For reproduction of the OSProcess issue, I used another simple command
> (from my other OSProcess umlaut issue :-)) to test it.
>
> calling this, results in a non responding image:
>
> 20 timesRepeat: [OSProcess   command: ('cp
> /Library/WebServer/Documents/reports/bar.pdf
> /Library/WebServer/Documents/reports/test-c.pdf').].
>
> also this:
> 20 timesRepeat: [OSProcess   command: ('echo "Hi there"').]
>
> My original code is similar to this but here only for information:
> OSProcess
>               command:
>                       ('{1} -jar {2} PDFToImage -format PNG -page 1 -dpi 100 {3}'
>                               format:
>                                       {'Library/Internet\
> Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java'.
>                                       '/Users/sabine/Desktop/pdfbox-app-2.0.1.jar'.
>
> '/Library/WebServer/Documents/reports/201411121510-112859865-3378921/20150605_170_IFA_Berlin_Reisekostenabrechnung.pdf'}).
>
>
> So, my question is: is it wrong, calling OSProcess like this? How to do it
> instead?
>
> I am sorry to ask again and hope that there is a simple solution.
> Or is it a bug in OSProcess?
>
> Regards
> Sabine





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