What does “Returning duplicate cardTablePart entry” mean in a weblogic log?

Question

In my weblogic output log I get thousands upon thousands of errors containing:

Returning duplicate cardTablePart entry

: In my weblogic log. What do these "cardTablePart" errors mean and how can I find out what causes them?

Answer 1

This message is seen in JRockit JVM verbose output during Garbage collections

From Sec "Example 2-9 Young Collection Output of the memdbg Module" on this link ,

3: [DEBUG][memory ] [YC#1] Returning duplicate cardTablePart entry 2 (0x4201e000-0x4202e000)

Line 3 shows what happens if several threads try to process the same memory.