Sometimes I get the following exception when running unit tests: java.lang.ClassFormatError: Duplicate field name&signature in class file CampaignClient at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) Unfortunately, without a field name + signature I have no way of knowing what is triggering the problem. The class in question is quite big so removing code by trial and error is very time consuming. Would like: java.lang.ClassFormatError: Duplicate field name LOG with signature org.slf4j.Logger in class file CampaignClient
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