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.sab...@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-often-tp4899540.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >
