Maybe I found a solution:

The error does not appear with the version 22-SNAPSHOT  instead of 21.



On 02/04/2019 10:41, Peter wrote:
> No war file yet.
> I run it in the tomcat environment of eclipse.
>
>
> On 02/04/2019 10:39, Ian Turton wrote:
>> How did you package your war file?
>>
>> Ian 
>>
>> On Tue, 2 Apr 2019, 09:33 Peter, <dojouserpe...@orange.fr
>> <mailto:dojouserpe...@orange.fr>> wrote:
>>
>>     Dear all,
>>
>>     Eclipse+Maven+Tomcat.
>>
>>     My code runs fine when run as "Java Application".
>>
>>     It fails when running within a servlet. So it must be an issue
>>     with the
>>     Jar Loader of geotools.
>>
>>
>>     using org.geotools.metadata.iso.citation.Citations
>>
>>
>>     throws
>>
>>
>>     java.lang.AbstractMethodError:
>>
>>     
>> org.geotools.metadata.iso.citation.ContactImpl.getOnlineResource()Lorg/opengis/metadata/citation/OnlineResource;
>>
>>
>>     The error is thrown in the static part of Citations
>>
>>       final CitationImpl c = new CitationImpl(ResponsiblePartyImpl.OGC);
>>
>>     Has anyone any idea? Maybe a geotools Hint ?
>>
>>     I spent already hours without a solution.
>>
>>     Thank you
>>
>>     Peter
>>
>>
>>     java.lang.AbstractMethodError:
>>     
>> org.geotools.metadata.iso.citation.ContactImpl.getOnlineResource()Lorg/opengis/metadata/citation/OnlineResource;
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
>>     
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>     at
>>     
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>     at java.lang.reflect.Method.invoke(Method.java:498) at
>>     org.geotools.metadata.PropertyAccessor.get(PropertyAccessor.java:450)
>>     at
>>     
>> org.geotools.metadata.PropertyAccessor.hashCode(PropertyAccessor.java:773)
>>     at
>>     
>> org.geotools.metadata.MetadataStandard.hashCode(MetadataStandard.java:303)
>>     at
>>     
>> org.geotools.metadata.AbstractMetadata.hashCode(AbstractMetadata.java:198)
>>     at
>>     
>> org.geotools.metadata.PropertyAccessor.hashCode(PropertyAccessor.java:775)
>>     at
>>     
>> org.geotools.metadata.MetadataStandard.hashCode(MetadataStandard.java:303)
>>     at
>>     
>> org.geotools.metadata.AbstractMetadata.hashCode(AbstractMetadata.java:198)
>>     at java.util.HashMap.hash(HashMap.java:339) at
>>     java.util.HashMap.put(HashMap.java:612) at
>>     java.util.HashSet.add(HashSet.java:220) at
>>     org.geotools.util.CheckedHashSet.add(CheckedHashSet.java:190) at
>>     org.geotools.metadata.iso.citation.CitationImpl.(CitationImpl.java:156)
>>     at org.geotools.metadata.iso.citation.Citations.(Citations.java:76)
>>
>>
>>     _______________________________________________
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>>     <mailto:GeoTools-GT2-Users@lists.sourceforge.net>
>>     https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
>>
>
>
>
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