1 files changed, 3 insertions, 2 deletions
diff --git a/src/main/java/org/traccar/helper/Log.java b/src/main/java/org/traccar/helper/Log.java
index 607a0585f..358f11a31 100644
--- a/src/main/java/org/traccar/helper/Log.java
+++ b/src/main/java/org/traccar/helper/Log.java
@@ -211,9 +211,10 @@ public final class Log {
     }
 
     public static String exceptionStack(Throwable exception) {
-        Throwable cause;
-        while (null != (cause = exception.getCause())  && (exception != cause) ) {
+        Throwable cause = exception.getCause();
+        while (cause != null && exception != cause) {
             exception = cause;
+            cause = cause.getCause();
         }
 
         StringBuilder s = new StringBuilder();