Remove stacktrace from recoverable discovery log warnings

This is to reduce the noise in the logs when recoverable discovery exceptions occur. Complete discovery failures are expected to be reported separately.

Author: injectives

driver/src/main/java/org/neo4j/driver/internal/cluster/RediscoveryImpl.java

@@ -53,13 +53,15 @@
 import static org.neo4j.driver.internal.util.Futures.failedFuture;
 
 /**
- * This class is used by all router tables to perform discovery.
- * In other words, the methods in this class could be called by multiple threads concurrently.
+ * This class is used by all router tables to perform discovery. In other words, the methods in this class could be called by multiple threads concurrently.
  */
 public class RediscoveryImpl implements Rediscovery
 {
     private static final String NO_ROUTERS_AVAILABLE = "Could not perform discovery for database '%s'. No routing server available.";
     private static final String RECOVERABLE_ROUTING_ERROR = "Failed to update routing table with server '%s'.";
+    private static final String RECOVERABLE_DISCOVERY_ERROR_WITH_SERVER = "Received a recoverable discovery error with server '%s', " +
+                                                                          "will continue discovery with other routing servers if available. " +
+                                                                          "Complete routing failures will be reported separately from this warning.";
 
     private final BoltServerAddress initialRouter;
     private final RoutingSettings settings;
@@ -291,8 +293,9 @@ private ClusterComposition handleRoutingProcedureError( Throwable error, Routing
         // Retriable error happened during discovery.
         DiscoveryException discoveryError = new DiscoveryException( format( RECOVERABLE_ROUTING_ERROR, routerAddress ), error );
         Futures.combineErrors( baseError, discoveryError ); // we record each failure here
-        logger.warn( format( "Received a recoverable discovery error with server '%s', will continue discovery with other routing servers if available.",
-                routerAddress ), discoveryError );
+        String warningMessage = format( RECOVERABLE_DISCOVERY_ERROR_WITH_SERVER, routerAddress );
+        logger.warn( warningMessage );
+        logger.debug( warningMessage, discoveryError );
         routingTable.forget( routerAddress );
         return null;
     }