A FAQ is required regarding the failures in logback.groovy parsing. ------------------------------------------------------------------- Key: LBGENERAL-45 URL: http://jira.qos.ch/browse/LBGENERAL-45 Project: logback-general Issue Type: Bug Affects Versions: unspecified Environment: All Reporter: Rathnadhar.K.V Assignee: Logback dev list Priority: Minor I switched from log4j to logback. I initially used logback.xml . I wanted to get rid of xml, hence switched over to logback.groovy. I used to get : Failed to instantiate [ch.qos.logback.classic.LoggerContext] Reported exception: java.lang.VerifyError: (class:groovy/runtime/metaclass/java/lang/StringMetaClass, method: super$2$invokeMethod signature: (Ljava/lang/Class;Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;ZZ)Ljava/lang/Object;) Illegal use of nonvirtual function call I googled around to resolve the issue, but it was not helpful. Finally i reported the issue to logback-users group. The issue was resolved in a jiffy. Now the program is working perfectly. The issue was another jar was using a lower version of groovy (1.1) while logback was on 1.7. A FAQ about the logback groovy failure in case of lower version of groovy present in the class path would be much helpful to debug. Also a list of popular jars that use groovy would also help to fix the problem at earliest. Kindly have one such. Regards Rathnadhar.K.V -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.qos.ch/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira