*/
TransactionParticipant tp = new ParticipantImpl();
((ServerTransaction) txn).join(tp, System.currentTimeMillis());
// run thread which will prevent normal commit completion
Committer committer = new Committer(tp, (ServerTransaction) txn,
mgr);
committer.start();
// try to commit the operation
try {
txnCommit(txn);
throw new TestException(