Include the full exception and stack trace when an unexpected error o…

…ccurs in the LeaderScheduler. (#3648)

Signed-off-by: David Venable <[email protected]>

data-prepper-plugins/dynamodb-source/src/main/java/org/opensearch/dataprepper/plugins/source/dynamodb/leader/LeaderScheduler.java

@@ -116,7 +116,7 @@ public void run() {
                 }
 
             } catch (Exception e) {
-                LOG.error("Exception occurred: {}", e.getMessage());
+                LOG.error("Exception occurred in primary scheduling loop", e);
             } finally {
                 try {
                     Thread.sleep(DEFAULT_LEASE_INTERVAL_MILLIS);