fix 'occured' -> 'occurred' typos in error messages across C# and Python IPC (#3733)

- lang/csharp/.../HttpListenerServer.cs: Debug.Print message in the
  HTTP listener when the per-request handler throws.
- lang/py/.../tether/tether_task_runner.py: two log.error messages
  emitted from TetherTaskRunner.process_message when the partition
  message fails to parse or any other exception propagates.
- lang/py/.../tether/tether_task.py: two log messages emitted from
  TetherTask.fail when the task reports failure / fails to send the
  fail message back to the output server.

No functional changes.

Signed-off-by: Sai Asish Y <say.apm35@gmail.com>

Author: SAY-5

lang/csharp/src/apache/ipc/HttpListenerServer.cs

@@ -77,7 +77,7 @@ protected void HttpListenerCallback(IAsyncResult result)
                 //    ExceptionHandler(ex, result);
                 //else
                 //    Debug.Print("Exception occured while processing a request, no exception handler was provided - ignoring", ex);
-                Debug.Print("Exception occured while processing a web request, skipping this request: ", ex);
+                Debug.Print("Exception occurred while processing a web request, skipping this request: ", ex);
             }
         }
 

lang/py/avro/tether/tether_task.py

@@ -422,7 +422,7 @@ def fail(self, message):
         """
         Call to fail the task.
         """
-        self.log.error("TetherTask.fail: failure occured message follows:\n%s", message)
+        self.log.error("TetherTask.fail: failure occurred message follows:\n%s", message)
         try:
             message = message.decode()
         except AttributeError:
@@ -431,7 +431,7 @@ def fail(self, message):
         try:
             self.outputClient.request("fail", {"message": message})
         except Exception:
-            self.log.exception("TetherTask.fail: an exception occured while trying to send the fail message to the output server.")
+            self.log.exception("TetherTask.fail: an exception occurred while trying to send the fail message to the output server.")
 
         self.close()
 

lang/py/avro/tether/tether_task_runner.py

@@ -67,7 +67,7 @@ def invoke(self, message, request):
                 try:
                     self.task.partitions = request["partitions"]
                 except Exception:
-                    self.log.error("Exception occured while processing the partitions message: Message:\n%s", traceback.format_exc())
+                    self.log.error("Exception occurred while processing the partitions message: Message:\n%s", traceback.format_exc())
                     raise
             elif message.name == "input":
                 self.log.info("TetherTaskRunner: Received input")
@@ -84,7 +84,7 @@ def invoke(self, message, request):
                 self.log.warning("TetherTaskRunner: Received unknown message %s", message.name)
 
         except Exception:
-            self.log.error("Error occured while processing message: %s", message.name)
+            self.log.error("Error occurred while processing message: %s", message.name)
             e = traceback.format_exc()
             self.task.fail(e)