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From Jochen Theodorou <>
Subject Re: Upgrade Groovy jar - can't start tomcat
Date Wed, 21 Mar 2018 12:46:13 GMT

Am 21.03.2018 um 12:34 schrieb Blake McBride:
> Thanks!  Turns out, this is a known problem with older versions of 
> tomcat.  I don't think any changes in groovy are necessary.

just in case you are somebody else wants to know more

Unable to process Jar entry [module-info.class] from Jar 
[jar:file:/.../build/web/WEB-INF/lib/groovy-2.4.14.jar!/] for annotations
org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte 
tag in constant pool: 19

module-info.class is for Java9 and requires a special flag available 
only in Java9 and later (constant pool entry with id 19). Thus for 
Tomcat under Java 8 the only solution is to ignore that or use a newer 
version of bcel that supports java9 and then ignore it. Because you 
cannot load it.

bye Jochen

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