Improve APEX logging for irrelevant events

When multiple policies are expecting event on the same topic/endpoint,
a lot of event parsing failure log messages are generated
unnecessarily. With this change, only a 1 line message will
be printed if an event cannot be parsed, and the detailed messages
will be available at debug level.

Change-Id: If1e7460ef5ed86fd470396f1e2ed8cc3c8af70c4
Issue-ID: POLICY-3499
Signed-off-by: a.sreekumar <ajith.sreekumar@bell.ca>

1 files changed, 3 insertions, 0 deletions

diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/main/ApexEventUnmarshaller.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/main/ApexEventUnmarshaller.java
index f49115b38..4e62f5c0f 100644
--- a/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/main/ApexEventUnmarshaller.java
+++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/main/ApexEventUnmarshaller.java
@@ -264,6 +264,9 @@ public class ApexEventUnmarshaller implements ApexEventReceiver, Runnable {
             } catch (ApexException e) {
                 if (!iterator.hasNext()) {
                     final String errorMessage = "Error while converting event into an ApexEvent for " + name;
+                    if (!LOGGER.isDebugEnabled()) {
+                        LOGGER.warn("{}. Detailed logs are available at debug level.", errorMessage);
+                    }
                     throw new ApexEventException(errorMessage, e);
                 }
             }