killbill-memoizeit

diff --git a/payment/src/main/java/org/killbill/billing/payment/dispatcher/PaymentPluginDispatcher.java b/payment/src/main/java/org/killbill/billing/payment/dispatcher/PaymentPluginDispatcher.java
index b44e06a..fec3c2e 100644
--- a/payment/src/main/java/org/killbill/billing/payment/dispatcher/PaymentPluginDispatcher.java
+++ b/payment/src/main/java/org/killbill/billing/payment/dispatcher/PaymentPluginDispatcher.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2014-2015 Groupon, Inc
- * Copyright 2014-2015 The Billing Project, LLC
+ * Copyright 2014-2016 Groupon, Inc
+ * Copyright 2014-2016 The Billing Project, LLC
  *
  * The Billing Project licenses this file to you under the Apache License, version 2.0
  * (the "License"); you may not use this file except in compliance with the
@@ -49,7 +49,7 @@ public class PaymentPluginDispatcher {
             return result;
         } catch (final TimeoutException e) {
             final String errorMessage = String.format("TimeoutException while executing plugin='%s'", pluginNames);
-            log.warn(errorMessage, e);
+            log.warn(errorMessage);
             throw new PaymentApiException(ErrorCode.PAYMENT_PLUGIN_TIMEOUT, accountId, errorMessage);
         } catch (final InterruptedException e) {
             Thread.currentThread().interrupt();
@@ -61,7 +61,7 @@ public class PaymentPluginDispatcher {
                 throw (PaymentApiException) e.getCause();
             } else if (e.getCause() instanceof LockFailedException) {
                 final String format = String.format("Failed to lock accountExternalKey='%s'", accountExternalKey);
-                log.warn(format, e);
+                log.warn(format);
                 throw new PaymentApiException(ErrorCode.PAYMENT_INTERNAL_ERROR, format);
             } else {
                 throw new PaymentApiException(e, ErrorCode.PAYMENT_INTERNAL_ERROR, MoreObjects.firstNonNull(e.getMessage(), ""));