Jorge Ferreira [http://community.jboss.org/people/imjorge] replied to the discussion "Multiple JBPM4_VARIABLE records pointing to same LOB_ and different EXECUTIONID_" To view the discussion, visit: http://community.jboss.org/message/548993#548993 -------------------------------------------------------------- After looking into jBPM source code I get a concrete impression that there should not be two jbpm4_variable (Variable and class hierarchy) that share the same Lob. The Lob constructors take care (because generateDbId is true) of assigning a new id to the record. My best guess is something with the DatabaseDbIdGenerator but looking into the source code I have found nothing strange. More, the LOB_ that are duplicated as FK in jbpm4_variable table seem unrelated: 1970117, 1970123, 1970218, 2260229, 2260232 So a guess on edge cases, boundaries of block size, is off by now. I put a little test with two JVM for concurrency but the block generation is done inside a transaction and the behavior seems correct. One JVM fails but it is on a cycle of attempts and it peeks the next available block. Any ideas from the people that coded jBPM, maybe I am missing something. -- Jorge -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/548993#548993] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]