Fix of dynamic filters update

6 years ago · 169d12db52
1 changed files with 1 additions and 1 deletions
--- a/application/src/main/java/org/thingsboard/server/service/subscription/TbAbstractDataSubCtx.java
+++ b/application/src/main/java/org/thingsboard/server/service/subscription/TbAbstractDataSubCtx.java
@ -238,7 +238,7 @@ public abstract class TbAbstractDataSubCtx<T extends AbstractDataQuery<? extends
        private String lastUpdateValue;

        boolean updateValue(TsValue value) {
-            if (value.getTs() > lastUpdateTs && !lastUpdateValue.equals(value.getValue())) {
+            if (value.getTs() > lastUpdateTs && (lastUpdateValue == null || !lastUpdateValue.equals(value.getValue()))) {
                this.lastUpdateTs = value.getTs();
                this.lastUpdateValue = value.getValue();
                return true;