diff --git a/src/main/java/cn/edu/hfut/dmic/webcollector/plugin/berkeley/BerkeleyDBManager.java b/src/main/java/cn/edu/hfut/dmic/webcollector/plugin/berkeley/BerkeleyDBManager.java
index 0468f4ee..f20ab764 100644
--- a/src/main/java/cn/edu/hfut/dmic/webcollector/plugin/berkeley/BerkeleyDBManager.java
+++ b/src/main/java/cn/edu/hfut/dmic/webcollector/plugin/berkeley/BerkeleyDBManager.java
@@ -124,6 +124,7 @@ public void open() throws Exception {
 
     @Override
     public void close() throws Exception {
+        env.cleanLog();
         env.close();
     }