[collector] bugfix: Fixed expression:(A | B), A and B are null, print…

… the error log (#387)
apache · Oct 25, 2022 · 2a34c5a · 2a34c5a
1 parent d86de8b
commit 2a34c5a
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/collector/src/main/java/com/usthe/collector/dispatch/MetricsCollect.java b/collector/src/main/java/com/usthe/collector/dispatch/MetricsCollect.java
@@ -324,7 +324,12 @@ private void calculateFields(Metrics metrics, CollectRep.MetricsData.Builder col
                         }
                     }
                     try {
-                        Object objValue = expression.execute(fieldValueMap);
+                        // A | B的表达式, A和B都的value都为null, 防止打印异常
+                        List<Object> valueList = fieldValueMap.values().stream().filter(Objects::nonNull).collect(Collectors.toList());
+                        Object objValue = null;
+                        if (!valueList.isEmpty()) {
+                            objValue = expression.execute(fieldValueMap);
+                        }
                         if (objValue != null) {
                             value = String.valueOf(objValue);
                         }