Forum: JRuby File open causes crash

Just trying to open a file which worked in my MRI based project

basically:

File.open(path,"w"){|file| .}

so besides the initial question of why can't I open a file and how can I 
fix it. My second question is am I being naive in hoping that I can run 
an MRI based project with little modification over JRuby ? Is there  a 
compatability write up ?

thanks



here's the stack:

Errno::EACCES: Permission denied - 
S:/Apps/IdeaProjects/Jruby/DataUploader/src/test/output/jeff_to_tb_upload_format.txt2012-11-12T21:23:05-05:00
       initialize at org/jruby/RubyFile.java:315
             open at org/jruby/RubyIO.java:1176
  write_to_output at 
S:/Apps/IdeaProjects/Jruby/DataUploader/src/specs/../../src/lib/feed_management.rb:552
   process_source at 
S:/Apps/IdeaProjects/Jruby/DataUploader/src/specs/../../src/lib/feed_management.rb:482
             each at org/jruby/RubyArray.java:1612
   process_source at 
S:/Apps/IdeaProjects/Jruby/DataUploader/src/specs/../../src/lib/feed_management.rb:465
           (root) at 
S:/Apps/IdeaProjects/Jruby/DataUploader/src/specs/test_jefferies_load.rb:4
             load at org/jruby/RubyKernel.java:1045
           (root) at -e:1

Process finished with exit code 1






Charles Monteiro
jruby@smallruby.com

Charles,

On 11/12/12 9:36 PM, Charles Monteiro wrote:
>
> thanks
>
>
>
> here's the stack:
>
> Errno::EACCES: Permission denied -

That's an indication that the file permissions are likely wrong. Are you
running your JRuby program as the same user as your MRI ruby program? Is
it the same directory? Does the directory exist? Does it have write
permission for the user running the program?

  - George

>             (root) at
>
> Charles Monteiro
> jruby@smallruby.com <mailto:jruby@smallruby.com>
>
>
>

--
  ----------------------------------------------------------------------
   * George Dinwiddie *                      http://blog.gdinwiddie.com
   Software Development                    http://www.idiacomputing.com
   Consultant and Coach                    http://www.agilemaryland.org
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Charles -

+1 for George's comments.

Also, your filespec has a timestamp after the .txt extension.  Is that
intentional? It looks like you're running in Windows.  I believe colons
are not permitted in Windows filespecs except when following drive
letters, as in the "S:".

You might want to try playing around in JRuby's jirb...you might be able
to narrow down the problem there.

- Keith

Keith R. Bennett
http://about.me/keithrbennett

I'm afraid that the issue is more complicated that that.

Things work on my Mac OS X instance running under MRI 1.9.3 and Jruby 
1.7 but they don't one one of my Win installations where I'm also 
encountering other strange issues I'll share in another post.

On my Win notebook I encountered the same issue but I noticed that under 
MRI I got an invalid argument error instead of the access error that 
Jruby was spitting out. I narrowed it down to an issue with the format 
of the file name I was using which it hadn't care about before.

There's obviously some issue with underlying Java setups and perhaps 
upgrades of gems etc. I have not kept up with my Java so I'm probably 
not setting things up properly.

Currently I'm trying to set all of my dev environments in the same exact 
way as much as is possible to have a more controlled environment.


Charles Monteiro
jruby@smallruby.com

Keith:

thanks.

I go back and forth between my Mac and Win tablet. I'l admit that I 
probably recently added the timestamp string while I was on the Mac 
session. What threw me off was the access error from Jruby.  MRI gave me 
an invalid argument error which made sense and I went ahead and cleaned 
out the timestamp string to be vanilla safe. So as it stands on my 
Windows tablet / notebook and on my Mac OS X mini tests prove true for 
same code base and on same jruby sdk.

However, that is still not the case with my Windows PC which I have just 
added into the mix. Why? Long story but superstorm Sandy has forced me 
to work from home and the Win PC is far more comfortable to use than my 
Win tablet (ASUS EP-121) which I have a setup a work to hook up to.

One of my issues going forward will simply be that I''m just not used to 
Java / Jruby error messages. Also I have to re-familiarize myself with 
Java setups. My debugging will necessarily be slower until I get passed 
this initial learning curve.


Charles Monteiro
jruby@smallruby.com

Charles,

EACCES is an operating system error number.

  - George

On 11/13/12 9:37 PM, Charles Monteiro wrote:
>
>>
>>> Charles,
>>>> an MRI based project with little modification over JRuby ? Is there  a
>>> That's an indication that the file permissions are likely wrong. Are you 
running your JRuby program as the same user as your MRI ruby program? Is it the 
same directory? Does the directory exist? Does it have write permission for the 
user running the program?
>>>>               each at org/jruby/RubyArray.java:1612
>>>>
>>
>
>      http://xircles.codehaus.org/manage_email
>
>
>

--
  ----------------------------------------------------------------------
   * George Dinwiddie *                      http://blog.gdinwiddie.com
   Software Development                    http://www.idiacomputing.com
   Consultant and Coach                    http://www.agilemaryland.org
  ----------------------------------------------------------------------