diff --git a/pom.xml b/pom.xml
index 154f19c..bddf7de 100644
--- a/pom.xml
+++ b/pom.xml
@@ -170,6 +170,11 @@
       <name>David Sean Taylor</name>
       <email>taylor@apache.org</email>
     </contributor>
+    <contributor>
+      <name>fangwentong</name>
+      <email>fangwentong2012@gmail.com</email>
+    </contributor>
+    
   </contributors>
 
   <scm>
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 73f2613..6435c55 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -43,7 +43,10 @@
   </properties>
 
   <body>
-    <release version="1.3.3" description="Bugfix release for 1.3.2" date="tba">
+    <release version="1.3.4" description="Bugfix release for 1.3.3" date="tba">
+      <action issue="FILEUPLOAD-288" dev="jochen" due-to="fangwentong" due-to-email="fangwentong2012@gmail.com">Avoid using File.exists() on temporary files, if we know that the file has been created.</action>
+    </release>
+    <release version="1.3.3" description="Bugfix release for 1.3.2" date="2017-06-13">
       <action issue="FILEUPLOAD-279" dev="jochen" type="fix">
         DiskDileItem can actually no longer be deserialized, unless a system property is set to true.
       </action>
diff --git a/src/main/java/org/apache/commons/fileupload/disk/DiskFileItem.java b/src/main/java/org/apache/commons/fileupload/disk/DiskFileItem.java
index 00eda95..e11d938 100644
--- a/src/main/java/org/apache/commons/fileupload/disk/DiskFileItem.java
+++ b/src/main/java/org/apache/commons/fileupload/disk/DiskFileItem.java
@@ -461,7 +461,7 @@
     public void delete() {
         cachedContent = null;
         File outputFile = getStoreLocation();
-        if (outputFile != null && outputFile.exists()) {
+        if (outputFile != null && !isInMemory()  &&  outputFile.exists()) {
             outputFile.delete();
         }
     }
@@ -566,6 +566,9 @@
      */
     @Override
     protected void finalize() {
+        if (dfos == null  ||  dfos.isInMemory()) {
+            return;
+        }
         File outputFile = dfos.getFile();
 
         if (outputFile != null && outputFile.exists()) {