diff --git a/wrapper/src/main/java/software/amazon/jdbc/plugin/limitless/LimitlessRouterServiceImpl.java b/wrapper/src/main/java/software/amazon/jdbc/plugin/limitless/LimitlessRouterServiceImpl.java
index 24500a7d2..d40131295 100644
--- a/wrapper/src/main/java/software/amazon/jdbc/plugin/limitless/LimitlessRouterServiceImpl.java
+++ b/wrapper/src/main/java/software/amazon/jdbc/plugin/limitless/LimitlessRouterServiceImpl.java
@@ -131,6 +131,9 @@ public void establishConnection(final LimitlessConnectionContext context) throws
         try {
           context.setConnection(context.getConnectFunc().call());
         } catch (final SQLException e) {
+          if (this.isLoginException(e)) {
+            throw e;
+          }
           retryConnectWithLeastLoadedRouters(context);
         }
       }
@@ -150,6 +153,9 @@ public void establishConnection(final LimitlessConnectionContext context) throws
           "LimitlessRouterServiceImpl.selectedHost",
           new Object[] {selectedHostSpec != null ? selectedHostSpec.getHost() : "null"}));
     } catch (SQLException e) {
+      if (this.isLoginException(e)) {
+        throw e;
+      }
       retryConnectWithLeastLoadedRouters(context);
       return;
     }
@@ -162,6 +168,9 @@ public void establishConnection(final LimitlessConnectionContext context) throws
     try {
       context.setConnection(this.pluginService.connect(selectedHostSpec, context.getProps(), context.getPlugin()));
     } catch (SQLException e) {
+      if (this.isLoginException(e)) {
+        throw e;
+      }
       if (selectedHostSpec != null) {
         LOGGER.fine(Messages.get(
             "LimitlessRouterServiceImpl.failedToConnectToHost",
@@ -205,7 +214,12 @@ private void retryConnectWithLeastLoadedRouters(
               context.setConnection(context.getConnectFunc().call());
               return;
             } catch (final SQLException e) {
-              throw new SQLException(Messages.get("LimitlessRouterServiceImpl.noRoutersAvailable"));
+              if (this.isLoginException(e)) {
+                throw e;
+              }
+              throw new SQLException(Messages.get(
+                  "LimitlessRouterServiceImpl.unableToConnectNoRoutersAvailable",
+                  new Object[] {context.getHostSpec().getHost()}), e);
             }
           }
         }
@@ -236,6 +250,9 @@ private void retryConnectWithLeastLoadedRouters(
           return;
         }
       } catch (final SQLException e) {
+        if (this.isLoginException(e)) {
+          throw e;
+        }
         selectedHostSpec.setAvailability(HostAvailability.NOT_AVAILABLE);
         LOGGER.finest(Messages.get(
             "LimitlessRouterServiceImpl.failedToConnectToHost",
@@ -259,6 +276,9 @@ protected void synchronouslyGetLimitlessRoutersWithRetry(final LimitlessConnecti
         }
         Thread.sleep(retryIntervalMs);
       } catch (final SQLException e) {
+        if (this.isLoginException(e)) {
+          throw e;
+        }
         LOGGER.finest(Messages.get("LimitlessRouterServiceImpl.getLimitlessRoutersException", new Object[] {e}));
       } catch (final InterruptedException e) {
         Thread.currentThread().interrupt();
@@ -309,6 +329,10 @@ protected void synchronouslyGetLimitlessRouters(final LimitlessConnectionContext
     }
   }
 
+  protected boolean isLoginException(Throwable throwable) {
+    return this.pluginService.isLoginException(throwable, this.pluginService.getTargetDriverDialect());
+  }
+
   @Override
   public void startMonitoring(final @NonNull HostSpec hostSpec,
       final @NonNull Properties props,
diff --git a/wrapper/src/main/java/software/amazon/jdbc/plugin/readwritesplitting/ReadWriteSplittingPlugin.java b/wrapper/src/main/java/software/amazon/jdbc/plugin/readwritesplitting/ReadWriteSplittingPlugin.java
index 8355c9de3..9909c613f 100644
--- a/wrapper/src/main/java/software/amazon/jdbc/plugin/readwritesplitting/ReadWriteSplittingPlugin.java
+++ b/wrapper/src/main/java/software/amazon/jdbc/plugin/readwritesplitting/ReadWriteSplittingPlugin.java
@@ -24,10 +24,10 @@
 import java.util.List;
 import java.util.Properties;
 import java.util.Set;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import software.amazon.jdbc.AwsWrapperProperty;
-import software.amazon.jdbc.ConnectionProviderManager;
 import software.amazon.jdbc.HostListProviderService;
 import software.amazon.jdbc.HostRole;
 import software.amazon.jdbc.HostSpec;
@@ -35,7 +35,6 @@
 import software.amazon.jdbc.NodeChangeOptions;
 import software.amazon.jdbc.OldConnectionSuggestedAction;
 import software.amazon.jdbc.PluginService;
-import software.amazon.jdbc.PooledConnectionProvider;
 import software.amazon.jdbc.PropertyDefinition;
 import software.amazon.jdbc.cleanup.CanReleaseResources;
 import software.amazon.jdbc.plugin.AbstractConnectionPlugin;
@@ -484,11 +483,14 @@ private void getNewReaderConnection() throws SQLException {
         readerHost = hostSpec;
         break;
       } catch (final SQLException e) {
-        LOGGER.warning(
-            () -> Messages.get(
-                "ReadWriteSplittingPlugin.failedToConnectToReader",
-                new Object[] {
-                    hostSpec.getUrl()}));
+        if (LOGGER.isLoggable(Level.WARNING)) {
+          LOGGER.log(Level.WARNING,
+              Messages.get(
+                  "ReadWriteSplittingPlugin.failedToConnectToReader",
+                  new Object[]{
+                      hostSpec.getUrl()}),
+              e);
+        }
       }
     }
 
diff --git a/wrapper/src/main/resources/aws_advanced_jdbc_wrapper_messages.properties b/wrapper/src/main/resources/aws_advanced_jdbc_wrapper_messages.properties
index 2395331ac..2e327a87b 100644
--- a/wrapper/src/main/resources/aws_advanced_jdbc_wrapper_messages.properties
+++ b/wrapper/src/main/resources/aws_advanced_jdbc_wrapper_messages.properties
@@ -259,9 +259,10 @@ LimitlessRouterServiceImpl.getLimitlessRoutersException=Exception encountered ge
 LimitlessRouterServiceImpl.incorrectConfiguration=Limitless Connection Plugin is unable to run. Please ensure the connection settings are correct.
 LimitlessRouterServiceImpl.interruptedSynchronousGetRouter=Limitless Router Service thread was interrupted while waiting to fetch Limitless Transaction Routers.
 LimitlessRouterServiceImpl.limitlessRouterCacheEmpty=Limitless Router cache is empty. This normal during application start up when the cache is not yet populated.
-LimitlessRouterServiceImpl.maxRetriesExceeded=Max number of connection retries has been exceeded.
-LimitlessRouterServiceImpl.noRoutersAvailable=No transaction routers available.
+LimitlessRouterServiceImpl.maxRetriesExceeded=Max number of connection retries has been exceeded. Unable to connect to any transaction router.
+LimitlessRouterServiceImpl.noRoutersAvailable=Unable to connect to any transaction router.
 LimitlessRouterServiceImpl.noRoutersAvailableForRetry=No transaction routers available for connection retry. Retrying with original connection.
+LimitlessRouterServiceImpl.unableToConnectNoRoutersAvailable=Unable to connect to original host {0}. All transaction routers are unavailable. Please verify connection credentials and network connectivity.
 LimitlessRouterServiceImpl.selectedHost=Host {0} has been selected.
 LimitlessRouterServiceImpl.selectedHostForRetry=Host {0} has been selected for connection retry.
 LimitlessRouterServiceImpl.synchronouslyGetLimitlessRouters=Fetching Limitless Routers synchronously.