diff --git a/src/main/java/com/taover/bazhuayun/analysis/web/module/heartbeat/holder/ClientHolderImpl.java b/src/main/java/com/taover/bazhuayun/analysis/web/module/heartbeat/holder/ClientHolderImpl.java
index 899d1df..d9278f0 100644
--- a/src/main/java/com/taover/bazhuayun/analysis/web/module/heartbeat/holder/ClientHolderImpl.java
+++ b/src/main/java/com/taover/bazhuayun/analysis/web/module/heartbeat/holder/ClientHolderImpl.java
@@ -61,11 +61,16 @@ public class ClientHolderImpl implements ClientHolder{
 
 	@Override
 	public void unregistryClient(String code) {
-		clientMap.remove(code);
+		if(code != null) {
+			clientMap.remove(code);
+		}
 	}
 
 	@Override
 	public boolean containInstanceCode(String code) {
+		if(code == null) {
+			return false;
+		}
 		return clientMap.containsKey(code);
 	}
 }
--
libgit2 0.21.2