Hi Andy,
note that the specific message you are seeing should be related to a
WARNING reporting that the NetCDF-4 native library is missing.
Which NetCDF format Datasets would you like to handle?
NetCDF3 datasets are handled through simple java code so that you may
ignore that warning being reported by the ucar library about the missing
native lib.
In addition GeoServer may support NetCDF4-C (C=Classic) which is a special
format based on HDF5 to provide same data compression and chunking
capabilities of that format, having however same limitations of NetCDF3
data model. Some more info about the NetCDF4Classic is available here:
http://www.digitalpreservation.gov/formats/fdd/fdd000339.shtml
If you need to handle NetCDF4Classic dataset, or you want to write a
NetCDF4-C output file through WCS2.0, then you need the NetCDF-4 native
libraries being installed on your system. In that case, did you have
already taken a look to the related GeoServer documentation?
http://docs.geoserver.org/2.8.1/user/extensions/netcdf-out/nc4.html
Please, let us know.
Cheers,
Daniele
On Wed, Oct 19, 2016 at 3:06 PM, Andy Gabey <a.m.ga...@reading.ac.uk> wrote:
> Hi all
>
>
>
> I’m having trouble getting the NetCDF (for data sources) plugin to work on
> Geoserver 2.9.2 (Jetty) under Ubuntu (and also Amazon) Linux. The problem
> is always the same: it can’t find the C library. The library is definitely
> installed (at /usr/lib/libnetcdf.so), and I’ve even tried compiling my own
> version in a home directory but with no success. Is there something simple
> that I’m failing to understand?
>
>
>
> As well as this, I’ve tried various iterations of the LD_LIBRARY_PATH and
> JNA_PATH environment variables (Geoserver picks up changes to the latter as
> shown below) but no luck.
>
>
>
> Any assistance would be appreciated
>
>
>
> Error log from server startup is below:
>
>
>
> 19 Oct 12:59:14 WARN [serverStartup] - Nc4Iosp: NetCDF-4 C library not
> present (jna_path='/usr/lib', libname='netcdf').
>
> java.lang.NoClassDefFoundError: com/sun/jna/Library
>
> at java.lang.ClassLoader.defineClass1(Native Method)
>
> at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
>
> at java.security.SecureClassLoader.defineClass(
> SecureClassLoader.java:142)
>
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
>
> at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
>
> at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
>
> at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
>
> at java.security.AccessController.doPrivileged(Native Method)
>
> at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
>
> at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(
> WebAppClassLoader.java:510)
>
> at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(
> WebAppClassLoader.java:441)
>
> at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(
> WebAppClassLoader.java:403)
>
> at ucar.nc2.jni.netcdf.Nc4Iosp.load(Nc4Iosp.java:172)
>
> at ucar.nc2.jni.netcdf.Nc4Iosp.isClibraryPresent(Nc4Iosp.java:196)
>
> at org.geotools.imageio.netcdf.utilities.NetCDFUtilities.<
> clinit>(NetCDFUtilities.java:373)
>
> at org.geotools.imageio.netcdf.NetCDFImageReaderSpi.<clinit>(
> NetCDFImageReaderSpi.java:123)
>
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
>
> at sun.reflect.NativeConstructorAccessorImpl.newInstance(
> NativeConstructorAccessorImpl.java:62)
>
>
>
> Thanks
> Andy
>
>
>
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>
--
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.
==
Ing. Daniele Romagnoli
Senior Software Engineer
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
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