From d1a38d38527100211ff7c7a9ee64a04d78341a2f Mon Sep 17 00:00:00 2001
From: bokai <Jinbokai@fanruan.com>
Date: Mon, 16 Nov 2020 21:41:37 +0800
Subject: [PATCH] =?UTF-8?q?REPORT-42043=20fanruan.log=E6=97=A0=E6=B3=95?=
 =?UTF-8?q?=E5=88=86=E5=89=B2?=
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---
 .../log4j/DailyRollingFileAppender.java       | 24 ++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/fine-log4j/src/main/java/com/fr/third/apache/log4j/DailyRollingFileAppender.java b/fine-log4j/src/main/java/com/fr/third/apache/log4j/DailyRollingFileAppender.java
index e23b4bb85..030b46d55 100644
--- a/fine-log4j/src/main/java/com/fr/third/apache/log4j/DailyRollingFileAppender.java
+++ b/fine-log4j/src/main/java/com/fr/third/apache/log4j/DailyRollingFileAppender.java
@@ -24,6 +24,7 @@ import com.fr.third.apache.log4j.spi.LoggingEvent;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.text.SimpleDateFormat;
@@ -358,7 +359,10 @@ public class DailyRollingFileAppender extends FileAppender {
     }
 
     if(result) {
-        file.delete();
+        if (!file.delete()) {
+            LogLog.debug("file delete failed, empty it.");
+            emptyFile(file);
+        }
       LogLog.debug(fileName +" -> "+ scheduledFilename);
     } else {
       LogLog.error("Failed to rename ["+fileName+"] to ["+scheduledFilename+"].");
@@ -375,6 +379,24 @@ public class DailyRollingFileAppender extends FileAppender {
     scheduledFilename = datedFilename;
   }
 
+
+    /**
+     * @param file empty file
+     */
+    private static void emptyFile(File file) {
+        try {
+            if (!file.exists()) {
+                file.createNewFile();
+            }
+            FileWriter fileWriter = new FileWriter(file);
+            fileWriter.write("");
+            fileWriter.flush();
+            fileWriter.close();
+        } catch (IOException e) {
+            LogLog.debug("empty file failed：" + e.getMessage() + e);
+        }
+    }
+
   /**
    * This method differentiates DailyRollingFileAppender from its
    * super class.