From c3f1407b6fbc2b7e59b050c1e72c9c0a95c59f48 Mon Sep 17 00:00:00 2001
From: "Frank.R.Wu" <wukd94@pku.edu.cn>
Date: Sun, 12 Dec 2021 17:12:49 +0800
Subject: [PATCH] fix: fix NullPointerException

fix NullPointerException in ContractStatusRecorder.killContract when killing a nonexistent contract process
---
 src/main/java/org/bdware/sc/ContractStatusRecorder.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/bdware/sc/ContractStatusRecorder.java b/src/main/java/org/bdware/sc/ContractStatusRecorder.java
index 3a595f2..5f47f1c 100644
--- a/src/main/java/org/bdware/sc/ContractStatusRecorder.java
+++ b/src/main/java/org/bdware/sc/ContractStatusRecorder.java
@@ -229,7 +229,9 @@ public class ContractStatusRecorder extends StatusRecorder<ContractMeta> {
             ContractManager.instance.invokeContractSuicide(client);
             ContractManager.cPort.updateDb(client.port, false);
         }
-        meta.contractExecutor.close();
+        if (null != meta.contractExecutor) {
+            meta.contractExecutor.close();
+        }
         id2ContractClient.remove(meta.id);
         runningProcess.remove(meta);
         return "success";