Hi Sabine, which version of Pharo are you using? I had similar issues, and I managed to reduce those occurrences to a reasonable level by changing the way I called OSProcess (and a lot of help from Dave). I do have sometime lockups with OSSubprocess as well, but those are also rare. (I do think this is a bug somewhere in the VM which makes it loose signals) The code I use is in GitFileTree: a low-level way of calling OSProcess which seems good at minimizing lockups. Thierry 2016-06-07 9:31 GMT+02:00 Sabine Manaa <manaa.sabine@gmail.com>:
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
-- View this message in context: http://forum.world.st/OSProcess-command-non-responding-image-when-calling-of... Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.