diff --git a/agent/src/main/java/io/wdd/agent/executor/thread/CommandExecLogCache.java b/agent/src/main/java/io/wdd/agent/executor/thread/CommandExecLogCache.java
index ac87800..64aa58b 100644
--- a/agent/src/main/java/io/wdd/agent/executor/thread/CommandExecLogCache.java
+++ b/agent/src/main/java/io/wdd/agent/executor/thread/CommandExecLogCache.java
@@ -43,7 +43,7 @@ public class CommandExecLogCache {
                 process.info()
         );
 
-        if (ObjectUtils.isEmpty(process)) {
+        if (ObjectUtils.isEmpty(process.getInputStream())) {
             log.error("process is null ! cache log error !");
             return;
         }