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Loading jars as symlinks

Sander Hamel
Greenhorn

Joined: Feb 26, 2010
Posts: 3
Hi,

We have a very strange problem with loading jars (which are symlinks).

We are loading about 20 jars inside a certain directory and all are ok, except 1 sometimes (x.jar)

Lets say the files are inside /opt/shared/lib and ls /opt/shared/lib shows:
a.jar -> /opt/a/a.jar
b.jar -> /opt/b/b.jar
c.jar -> /opt/c/c.jar
d.jar -> /opt/d/d.jar
x.jar -> /opt/x/x.jar

For some reason loading x always gives the exception:
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission /opt/x/x.jar read)

When we look at /opt/x/x.jar, the permissions are fine. Now comes the strange part.
After some tries we ended up with (d.jar was obsolete):
a.jar -> /opt/a/a.jar
b.jar -> /opt/b/b.jar
c.jar -> /opt/c/c.jar
x.jar -> /opt/x/x.jar

and everything works as expected.

Then we:
1. remove the symlink x.jar
2. add a new (dummy) file to this directory
3. make the symlink again
4. remove the dummy file

Now the problem occurs again and we get the above io.FilePermission exception.

Now if we:
1. remove the symlink
2. make the symlink again

The exception is gone, it seems as if the symlinks takes the physical place of the dummy file on the filesystem.

Redoing the above sequences gives again the FilePermission exception and finally OK again.

Some background info, the OS is Solaris 10 (sparc) using UFS filesystem. JDK used is 1.5.0_06 but have tested it using 1.6.0_18 with same results.
Joe Ess
Bartender

Joined: Oct 29, 2001
Posts: 8908
    
    8

Welcome to the JavaRanch.
This really isn't an IO question. I'm going to move it to our Unix forum. Good luck!


"blabbing like a narcissistic fool with a superiority complex" ~ N.A.
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Sander Hamel
Greenhorn

Joined: Feb 26, 2010
Posts: 3
Joe Ess wrote:Welcome to the JavaRanch.
This really isn't an IO question. I'm going to move it to our Unix forum. Good luck!


Hi Joe,

Thanks for moving my topic.

Actually I do believe that this issue is Java releated as the OS has no problem with these files whatsoever.
Joe Ess
Bartender

Joined: Oct 29, 2001
Posts: 8908
    
    8

Sander Hamel wrote:Actually I do believe that this issue is Java releated as the OS has no problem with these files whatsoever.


I wasn't disagreeing with you. I just moved your question out of our IO forum, which deals with the Java IO classes, to our Unix forum, which deals with OS-specific issues.
Sander Hamel
Greenhorn

Joined: Feb 26, 2010
Posts: 3
Joe Ess wrote:
Sander Hamel wrote:Actually I do believe that this issue is Java releated as the OS has no problem with these files whatsoever.


I wasn't disagreeing with you. I just moved your question out of our IO forum, which deals with the Java IO classes, to our Unix forum, which deals with OS-specific issues.


Ok sorry for misunderstanding, I'm still new here :-).
 
I agree. Here's the link: http://aspose.com/file-tools
 
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