The Enterprise Server provides workarounds for some known issues with the recovery implementations of the following JDBC drivers. These workarounds are used unless explicitly disabled.
In the Oracle thin driver, the XAResource.recover method repeatedly returns the same set of in-doubt Xids regardless of the input flag. According to the XA specifications, the Transaction Manager initially calls this method with TMSTARTSCAN and then with TMNOFLAGS repeatedly until no Xids are returned. The XAResource.commit method also has some issues.
To disable the Enterprise Server workaround, set the oracle-xa-recovery-workaround property value to false. For details about how to set this property, see Configuring the Transaction Service.
These workarounds do not imply support for any particular JDBC driver.