Maurice de Chateau [http://community.jboss.org/people/MohReece] replied to the discussion
"jBPM- Transaction isolation level" To view the discussion, visit: http://community.jboss.org/message/541577#541577 -------------------------------------------------------------- Hi Alexander, You're not mentioning which version of jBPM you're using, but in the user guide for version 3.2.x ( http://docs.jboss.com/jbpm/v3.2/userguide/html/persistence.html#isolationlevelofthejdbcconnection http://docs.jboss.com/jbpm/v3.2/userguide/html/persistence.html#isolationlevelofthejdbcconnection) you can read the following: "+Make sure that the database isolation level that you configure for your JDBC connection is at least READ_COMMITTED.+ +Almost all features run OK even with READ_UNCOMMITTED (isolation level 0 and the only isolation level supported by HSQLDB). But race conditions might occur in the job executor and with synchronizing multiple tokens.+" So that's quite clear in itself. But if you want a little more background, you can read this JIRA issue ( *https://jira.jboss.org/jira/browse/JBPM-983 JBPM-983*), in which Tom Baeyens explains about the underlying reasoning for this persistence aspect. Regards, Maurice -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/541577#541577] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034]
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