NPE fix in DefaultTbContext

application/src/main/java/org/thingsboard/server/actors/ruleChain/DefaultTbContext.java

@@ -169,7 +169,9 @@ class DefaultTbContext implements TbContext {
     private void enqueue(TopicPartitionInfo tpi, TbMsg tbMsg, Consumer<Throwable> onFailure, Runnable onSuccess) {
         if (!tbMsg.isValid()) {
             log.trace("[{}] Skip invalid message: {}", getTenantId(), tbMsg);
-            onFailure.accept(new IllegalArgumentException("Source message is no longer valid!"));
+            if (onFailure != null) {
+                onFailure.accept(new IllegalArgumentException("Source message is no longer valid!"));
+            }
             return;
         }
         TransportProtos.ToRuleEngineMsg msg = TransportProtos.ToRuleEngineMsg.newBuilder()
@@ -242,7 +244,9 @@ class DefaultTbContext implements TbContext {
     private void enqueueForTellNext(TopicPartitionInfo tpi, String queueName, TbMsg source, Set<String> relationTypes, String failureMessage, Runnable onSuccess, Consumer<Throwable> onFailure) {
         if (!source.isValid()) {
             log.trace("[{}] Skip invalid message: {}", getTenantId(), source);
-            onFailure.accept(new IllegalArgumentException("Source message is no longer valid!"));
+            if (onFailure != null) {
+                onFailure.accept(new IllegalArgumentException("Source message is no longer valid!"));
+            }
             return;
         }
         RuleChainId ruleChainId = nodeCtx.getSelf().getRuleChainId();