Oracle WebLogic Server 11g Administration Handbook

Transaction Logs and Transaction Recovery

WebLogic Server maintains transaction logs (referred to as tlog files), but these are quite different from normal server logs. The server uses the transaction logs to track all current transactions. WebLogic Server only records information about uncommitted transactions in the transaction log. When a server restarts after a failure, it uses the information in the transaction log to recover transactions. When you restart an instance, the server uses the transaction log files to perform the second phase of a two-phase commit transaction that was interrupted by the server failure. Using the transaction information from the transaction logs, the server makes an attempt to complete all in-flight, uncommitted ...