diff --git a/src/main/java/org/opengauss/portalcontroller/Tools.java b/src/main/java/org/opengauss/portalcontroller/Tools.java
index f3dfdc998f00a872163b81e4a0f2070f21a1eaa9..5faa34ee44ba1862cec3da2d6cc966eda2043ef2 100644
--- a/src/main/java/org/opengauss/portalcontroller/Tools.java
+++ b/src/main/java/org/opengauss/portalcontroller/Tools.java
@@ -366,6 +366,7 @@ public class Tools {
             LOGGER.error("IO exception occurred in reading parameters in properties files.");
             Thread.interrupted();
         }
+        pps.clear();
         return value;
     }
 
@@ -385,6 +386,7 @@ public class Tools {
                     table.put(o.toString(), pps.getProperty(o.toString()));
                 }
             }
+            pps.clear();
         } catch (FileNotFoundException e) {
             LOGGER.error("File not found exception occurred in getting single properties parameter.");
         } catch (IOException e) {