Fix for Bug 1433 Exception handling in aioread method

Change-Id: I39e2c888798dd518a9ad71e3cbd41be9241dd579
Signed-off-by: palsus <subhankar.pal@aricent.com>
diff --git a/osm_mon/server/server.py b/osm_mon/server/server.py
index 94c7479..117c054 100755
--- a/osm_mon/server/server.py
+++ b/osm_mon/server/server.py
@@ -52,7 +52,12 @@
         topics = [
             "alarm_request"
         ]
-        await self.msg_bus.aioread(topics, self._process_msg)
+        try:
+            await self.msg_bus.aioread(topics, self._process_msg)
+        except Exception as e:
+            # Failed to subscribe to kafka topic
+            log.exception("Error when subscribing to topics %s", str(topics))
+            raise e
 
     async def _process_msg(self, topic, key, values):
         log.info("Message arrived: %s", values)