The SCTP implementation uses NewDirectByteBuffer to create a new direct byte-buffer in native code. Such creations of a direct byte-buffer are not automatically associated with a Cleaner, therefore the native memory associated with the buffer may not be released when the buffer is no longer reachable.

The Java code that results in the native NewDirectByteBuffer should be examined with a view to creating a cleaner and assigning it to the direct byte-buffer.