[WFTC-52] calling XATerminator when subordinate transaction is removed

when subordinate transaction is removed from the 'known' ones,
we need to announce Narayana to clean its space too, otherwise
there is memory leak happening

src/main/java/org/wildfly/transaction/client/_private/Log.java

@@ -67,6 +67,9 @@ public interface Log extends BasicLogger {
     @Message(value = "Unknown I/O error when listing xa resource recovery files in %s (File.list() returned null)")
     void listXAResourceRecoveryFilesNull(File dir);
 
+    @LogMessage(level = Logger.Level.WARN)
+    @Message(value = "Error while removing imported transaction of xid %s from the underlying transaction manager")
+    void cannotRemoveImportedTransaction(Xid xid, @Cause XAException e);
 
     // Debug
 
@@ -112,6 +115,10 @@ public interface Log extends BasicLogger {
     @Message(value = "Recovered in doubt xa resource (%s) from xa resource recovery registry %s")
     void xaResourceRecoveredFromRecoveryRegistry(URI uri, Path filePath);
 
+    @LogMessage(level = Logger.Level.TRACE)
+    @Message(value = "Unknown xid %s to be removed from the instances known to the wfly txn client")
+    void unknownXidToBeRemovedFromTheKnownTransactionInstances(Xid xid);
+
     // Regular messages
 
     @Message(id = 0, value = "No transaction associated with the current thread")

src/main/java/org/wildfly/transaction/client/provider/jboss/JBossLocalTransactionProvider.java

@@ -226,7 +226,22 @@ public void afterCompletion(final int status) {
                         final ConcurrentMap<SimpleXid, Entry> known = JBossLocalTransactionProvider.this.known;
                         final Iterator<XidKey> iterator = timeoutSet.headSet(new XidKey(SimpleXid.EMPTY, timeTick)).iterator();
                         while (iterator.hasNext()) {
-                            known.remove(iterator.next().getId());
+                            SimpleXid xidToRemove = iterator.next().getId();
+                            Entry knownEntry = known.remove(xidToRemove);
+
+                            if (knownEntry == null) {
+                                Log.log.unknownXidToBeRemovedFromTheKnownTransactionInstances(xidToRemove);
+                            } else {
+                                final Transaction transaction = knownEntry.getTransaction();
+                                if (transaction instanceof ImportedTransaction) {
+                                    try {
+                                        ext.removeImportedTransaction(getXid(transaction));
+                                    } catch (XAException xae) {
+                                        Log.log.cannotRemoveImportedTransaction(xidToRemove, xae);
+                                    }
+                                }
+                            }
+
                             iterator.remove();
                         }
                     }