issue 1918: Ensure string values for span status and attribute values

Author: cmpilato

instrumentation/opentelemetry-instrumentation-pymongo/src/opentelemetry/instrumentation/pymongo/__init__.py

@@ -139,7 +139,7 @@ def started(self, event: monitoring.CommandStartedEvent):
                 )
                 span.set_attribute(SpanAttributes.DB_NAME, event.database_name)
                 span.set_attribute(SpanAttributes.DB_STATEMENT, statement)
-                if collection:
+                if collection and isinstance(collection, str):
                     span.set_attribute(
                         SpanAttributes.DB_MONGODB_COLLECTION, collection
                     )
@@ -193,7 +193,7 @@ def failed(self, event: monitoring.CommandFailedEvent):
         if span is None:
             return
         if span.is_recording():
-            span.set_status(Status(StatusCode.ERROR, event.failure))
+            span.set_status(Status(StatusCode.ERROR, str(event.failure)))
             try:
                 self.failed_hook(span, event)
             except (