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[netCDFJava #KTU-101437]: question about netcdf4 output

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  • Subject: [netCDFJava #KTU-101437]: question about netcdf4 output
  • Date: Tue, 14 Apr 2015 13:57:17 -0600
Hi Zhenping :

Usually you have to compile netcdf 4 library on each platform, you cant move it 
between machines.

Not sure if thats what you did.

John

> John:
> I have a null pointer exception from the netcdf4 library, the following is 
> the error msg:
> 
> Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library 
> /tmp/jna1935870281471053873.tmp which might have disabled stack guard. The VM 
> will try to fix the stack guard now.
> It's highly recommended that you fix the library with 'execstack -c 
> <libfile>', or link it with '-z noexecstack'.
> Exception in thread "Thread-0" java.lang.NullPointerException
> at ucar.nc2.jni.netcdf.Nc4Iosp.flush(Nc4Iosp.java:2433)
> at ucar.nc2.NetcdfFileWriter.flush(NetcdfFileWriter.java:849)
> at ucar.nc2.NetcdfFileWriter.close(NetcdfFileWriter.java:858)
> at 
> gov.nasa.grtdat.datainterface.netcdf.output.ABINetCDFWriter.writeData(ABINetCDFWriter.java:153)
> at gov.nasa.gratdat.gpaimpl.ABIOutputRunnable.run(ABIOutputRunnable.java:65)
> at java.lang.Thread.run(Thread.java:745)
> 
> My question are what is stack guard issue? How to avoid it? I compiled my 
> java code on one machine, where it seems working. However, when I tried to 
> install the jar file on another machine, it generates above error msg. Any 
> help would be greatly appreciated.
> 
> Thanks
> Zhenping Li
> 
> 

Ticket Details
===================
Ticket ID: KTU-101437
Department: Support netCDF Java
Priority: High
Status: Closed