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[netCDFJava #HUC-838359]: using netcdfAll-4.2.jar with webstart

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [netCDFJava #HUC-838359]: using netcdfAll-4.2.jar with webstart
  • Date: Sat, 17 Dec 2011 09:39:03 -0700
> Full Name: Tami Toto
> Email Address: address@hidden
> Organization: Brookhaven National Laboratory
> Package Version:
> Operating System:
> Hardware:
> Description of problem: Hi,
> 
> I am developing a JAVA webstart app and am trying to avoid having to sign all 
> of the .jars.  To that end, I had to switch to using javax.jnlp file i/o 
> instead of regular java.io.  It works great except that when I actually go to 
> read a netcdf file, I get the following error:
> 
> Loading file ...
> Exception in thread "AWT-EventQueue-0" java.security.AccessControlException: 
> access denied (java.io.FilePermission SWACR_CW1_MODE_03_.nc read)
> at 
> java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
> at java.security.AccessController.checkPermission(AccessController.java:546)
> at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
> at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:206)
> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:101)
> at ucar.unidata.io.RandomAccessFile.<init>(RandomAccessFile.java:267)
> at ucar.nc2.NetcdfFile.getRaf(NetcdfFile.java:520)
> at ucar.nc2.NetcdfFile.open(NetcdfFile.java:391)
> at ucar.nc2.NetcdfFile.open(NetcdfFile.java:364)
> at ucar.nc2.NetcdfFile.open(NetcdfFile.java:351)
> 
> It looks like this is because ucar.unidata.io uses java.io?  

yes

How do people generally get around this?  By signing their .jars?

yes - certificates are cheap.

john


Ticket Details
===================
Ticket ID: HUC-838359
Department: Support netCDF Java
Priority: Normal
Status: Open