added quick hack fix for #516: making sure do group_recvmsg()

after group_sendmsg().

src/bin/xfrin/xfrin.py.in

@@ -521,8 +521,19 @@ class Xfrin:
             msg = create_command(notify_out.ZONE_NEW_DATA_READY_CMD, param)
             # catch the exception, in case msgq has been killed.
             try:
-                self._send_cc_session.group_sendmsg(msg, XFROUT_MODULE_NAME)
-                self._send_cc_session.group_sendmsg(msg, ZONE_MANAGER_MODULE_NAME)
+                seq = self._send_cc_session.group_sendmsg(msg,
+                                                          XFROUT_MODULE_NAME)
+                try:
+                    answer, env = self._send_cc_session.group_recvmsg(False,
+                                                                      seq)
+                except isc.cc.session.SessionTimeout:
+                    pass        # for now we just ignore the failure
+                seq = self._send_cc_session.group_sendmsg(msg, ZONE_MANAGER_MODULE_NAME)
+                try:
+                    answer, env = self._send_cc_session.group_recvmsg(False,
+                                                                      seq)
+                except isc.cc.session.SessionTimeout:
+                    pass        # for now we just ignore the failure
             except socket.error as err: 
                 log_error("Fail to send message to %s and %s, msgq may has been killed" 
                           % (XFROUT_MODULE_NAME, ZONE_MANAGER_MODULE_NAME))
@@ -530,7 +541,12 @@ class Xfrin:
             msg = create_command(ZONE_XFRIN_FAILED, param)
             # catch the exception, in case msgq has been killed.
             try:
-                self._send_cc_session.group_sendmsg(msg, ZONE_MANAGER_MODULE_NAME)
+                seq = self._send_cc_session.group_sendmsg(msg, ZONE_MANAGER_MODULE_NAME)
+                try:
+                    answer, env = self._send_cc_session.group_recvmsg(False,
+                                                                      seq)
+                except isc.cc.session.SessionTimeout:
+                    pass        # for now we just ignore the failure
             except socket.error as err:
                 log_error("Fail to send message to %s, msgq may has been killed" 
                           % ZONE_MANAGER_MODULE_NAME)

src/bin/zonemgr/tests/zonemgr_test.py

@@ -43,6 +43,9 @@ class MySession():
         if module_name not in ("Auth", "Xfrin"):
             raise ZonemgrTestException("module name not exist")
 
+    def group_recvmsg(self, nonblock, seq):
+        return None, None
+
 class MyZonemgrRefresh(ZonemgrRefresh):
     def __init__(self):
         class FakeConfig:

src/bin/zonemgr/zonemgr.py.in

@@ -266,7 +266,11 @@ class ZonemgrRefresh:
         """Send command between modules."""
         msg = create_command(command_name, params)
         try:
-            self._cc.group_sendmsg(msg, module_name)
+            seq = self._cc.group_sendmsg(msg, module_name)
+            try:
+                answer, env = self._cc.group_recvmsg(False, seq)
+            except isc.cc.session.SessionTimeout:
+                pass        # for now we just ignore the failure
         except socket.error:
             sys.stderr.write("[b10-zonemgr] Failed to send to module %s, the session has been closed." % module_name)