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When I try to add the forum macro to a page, I see the following message:

Error formatting macro: forum: com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m ---- Debugging information ---- message : Invalid final field java.util.Collections$SynchronizedMap.m line number : 4 path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m cause-message : Invalid final field java.util.Collections$SynchronizedMap.m class : java.util.Collections$SynchronizedMap cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException required-type : java.util.Collections$SynchronizedMap -------------------------------

I'm running Confluence 3.1 and Community Bubbles 1.6m4, although I had the same problem with 1.5.

Any ideas?

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2 Comments

  1. Unknown User (skrebs)

    The errors I've seen like this before, have been when Confluence/Plugin have been running in a non Sun JVM. From the error message I'm guessing some part of the Bubbles plugin is serialising a synchronised map that it can't automatically de-serialise due to the different implementation of that class.

    1. Unknown User (scayla)

      Huge thanks!
      We were using a Jrockit jvm and had the exact same error for both the forum and the my-picture macros.
      Installing a Sun JVM completely solved the problem!