optimize: add null value check for MAC address (apache#6458)

mobuxian · Apr 23, 2024 · aa74ef0 · aa74ef0
1 parent 314b609
commit aa74ef0
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/common/src/main/java/org/apache/seata/common/util/IdWorker.java b/common/src/main/java/org/apache/seata/common/util/IdWorker.java
@@ -166,10 +166,10 @@ private long generateWorkerIdBaseOnMac() throws Exception {
             NetworkInterface networkInterface = all.nextElement();
             boolean isLoopback = networkInterface.isLoopback();
             boolean isVirtual = networkInterface.isVirtual();
-            if (isLoopback || isVirtual) {
+            byte[] mac = networkInterface.getHardwareAddress();
+            if (isLoopback || isVirtual || mac == null) {
                 continue;
             }
-            byte[] mac = networkInterface.getHardwareAddress();
             return ((mac[4] & 0B11) << 8) | (mac[5] & 0xFF);
         }
         throw new RuntimeException("no available mac found");