diff --git a/server/Process.cpp b/server/Process.cpp
index 47ab2d21..b899499f 100644
--- a/server/Process.cpp
+++ b/server/Process.cpp
@@ -109,7 +109,7 @@ void Process::run(const string &cmd, const string &log_file_tmp) {
         fprintf(stderr, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", getpid(), cmd.data());
 
         //关闭父进程继承的fd
-        for (int i = 3; i < 1024; i++) {
+        for (int i = 3; i < getdtablesize(); i++) {
             ::close(i);
         }