diff --git a/CHANGES.md b/CHANGES.md
index 5146ca5ae..835c8ca2b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -35,6 +35,7 @@ Release Notes.
 * [Breaking Change] Remove the namespace from `cross process propagation` key.
 * Make sure the parent endpoint in tracing context from existing first ENTRY span, rather than first span only.
 * Fix the bug that maybe causing memory leak and repeated traceId when use gateway-2.1.x-plugin or gateway-3.x-plugin.
+* Fix Grpc 1.x plugin could leak context due to gRPC cancelled.
 
 #### Documentation
 
diff --git a/apm-sniffer/apm-sdk-plugin/grpc-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/grpc/v1/server/TracingServerCallListener.java b/apm-sniffer/apm-sdk-plugin/grpc-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/grpc/v1/server/TracingServerCallListener.java
index 4a0ff7f7c..6e150b19c 100644
--- a/apm-sniffer/apm-sdk-plugin/grpc-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/grpc/v1/server/TracingServerCallListener.java
+++ b/apm-sniffer/apm-sdk-plugin/grpc-1.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/grpc/v1/server/TracingServerCallListener.java
@@ -73,6 +73,9 @@ public class TracingServerCallListener<REQUEST> extends ForwardingServerCallList
 
     @Override
     public void onCancel() {
+        if (contextSnapshot == null) {
+            return;
+        }
         final AbstractSpan span = ContextManager.createLocalSpan(operationPrefix + REQUEST_ON_CANCEL_OPERATION_NAME);
         span.setComponent(ComponentsDefine.GRPC);
         span.setLayer(SpanLayer.RPC_FRAMEWORK);