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  1. JDK
  2. JDK-8171194

Exception "Duplicate field name&signature in class file" should report the name and signature of the field

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    • Subcomponent:
    • Resolved In Build:
      b21

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        Description

        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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                • Assignee:
                  shshahma Shafi Ahmad
                  Reporter:
                  shadowbug Shadow Bug
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                  • Created:
                    Updated:
                    Resolved: