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Asked: 2026-05-27T05:48:53+00:00

I get this error: java.lang.InternalError: name is too long to represent at java.lang.ClassLoader.defineClass1(Native Method)

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I get this error:

java.lang.InternalError: name is too long to represent
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
        at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:338)
        at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:291)
        at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:259)

Which seems related to some debug functionality (in fact removing -Xdebug command line option the error disappears). I’ve also found some information in ASF Bugzilla. Is there a way to solve this?

Possible solutions I can think of are to change the JVM (using JRockit which should’t have this issue), but I do not really know if this can solve the issue and if it can break something else.

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1 Answer

  1. Editorial Team

    update The bug mentioned in the original answer below has now been closed!

    As noted in the article that you reference, this is a bug in the Sun/Oracle JVM implementation. At the time of writing, it is unresolved.

    I can think of three ways to work around the issue:

    1. Don’t generate SMAP files at all (eg: don’t run with -Xdebug or use suppressSmap-like settings)
    2. Try to make sure that the size of the debug information is small (eg: reduce the size of your code)
    3. Use a different virtual machine implementation.
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