question: public void connectionErrorOccurred ( ConnectionEvent event ) { if ( isActive ) { ManagedConnection conn = ( ManagedConnection ) event . getSource ( ) ; XAResource xar = ( XAResource ) xaResourcesMap . get ( conn ) ; xaResourcesMap . remove ( conn ) ; TransactionManagerImpl transManager = TransactionManagerImpl . getTransactionManager ( ) ; try { Transaction txn = transManager . getTransaction ( ) ; if ( txn != null && xar != null ) txn . delistResource ( xar , XAResource . TMSUCCESS ) ; } catch ( SystemException se ) { se . printStackTrace ( ) ; } try { mannPoolCache . expirePooledConnection ( conn ) ; } catch ( Exception ex ) { String exception = "JCAConnectionManagerImpl::connectionErrorOccured: Exception occured due to " + ex ; if ( logger . isDebugEnabled ( ) ) { logger . debug ( exception , ex ) ; } } } }
target:  CallBack for Connection Error.