ReferenceMap error with commons-collections-2.1

Asked Feb 20 '20 at 10:46

Active Feb 20 '20 at 11:46

Viewed 634 times

My project used below mentions jars: commons-collections-2.1.jar myfaces-api-1.1.3.jar myfaces-impl-1.1.3.jar and jsf version 1.1 but getting this error:

java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ReferenceMap

and commons-collection jar is available at runtime.

edited Feb 20 '20 at 11:46

Kukeltje

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asked Feb 20 '20 at 10:46

Aditya Mehta

You should have a look at the dependency graph, as it could be possible, that you have multiple apache-commons.jar versions in it. – Jan Held Feb 20 '20 at 10:57
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You should drop 15 year old libraries – Kukeltje Feb 20 '20 at 11:46

java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ReferenceMap error with commons-collections-2.1

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