So I spent time removing a bunch of other dependencies and moving the
references to the GeoTools dependencies as first in the list (using NetBeans
IDE). Now when I attempt to load a shapefile which initializes a class that
has imported org.geotools.data.FeatureSource I get the following error:
Exception in thread "Thread-40" java.lang.NoClassDefFoundError:
org/geotools/data/shapefile/files/FileReader
at
module.GeoImageLoader.GeoImageLoader$1.run(GeoImageLoader.java:759)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException:
org.geotools.data.shapefile.files.FileReader
at
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at
java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 2 more
From: Rob
Sent: Saturday, August 10, 2019 6:15 PM
To: [email protected]; [email protected]
Cc: [email protected]
Subject: RE: [Geotools-gt2-users] GeoTools 21.2 and Java 12
Hi Andrea and Ian,
Thank you both for the responses. Supporting only the LTSs makes perfect
sense. I’m also part of a very small development team working on a Java
project that started with Java 6 and includes dozens of 3rd party libraries…
as we try to make the transition to Java 9+. So I understand limited resources
and the issues of responding to all the Java changes.
Based on your responses I have modified our project to use Java 11. I’ve also
verified that the correct imports exist for the features/classes being used.
However, after these changes I’m getting the exact same error that I first
reported.
My suspicion is that this is the result of a dependencies conflict. But I’m
not sure how to track that down. I’ve spent literally about 45 hours over the
past 3 days trying to figure this out.
Any additional ideas or suggestions would be greatly appreciated!
Rob
From: Andrea Aime
<[email protected]<mailto:[email protected]>>
Sent: Saturday, August 10, 2019 4:39 AM
To: Rob <[email protected]<mailto:[email protected]>>
Cc:
[email protected]<mailto:[email protected]>
Subject: Re: [Geotools-gt2-users] GeoTools 21.2 and Java 12
On Sat, Aug 10, 2019 at 7:22 AM Rob
<[email protected]<mailto:[email protected]>> wrote:
Exception in thread "Thread-41" java.lang.NoClassDefFoundError: Could not
initialize class org.geotools.referencing.cs.DefaultCoordinateSystemAxis
Says here "could not initialize", means the class is actually found but
creation of some static field failed.
Can well be an issue specific to java 12, adding to what Ian said, we support
only Java 8 and 11, not because we don't like the others, but due to
lack of developers dedicated to the task. If you like to investigate and
propose changes to make it run on java 8, 11 and also 12, they would
be appreciated!
The idea is that GeoTools will only support LTSs, so the next target will be
Java 14, once it's out and we can gather enough people to run
another code sprint for upgrading to it.
Cheers
Andrea
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions
S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39 0584 962313 fax:
+39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it
http://twitter.com/geosolutions_it
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