REPORT-42043 fanruan.log无法分割-多线程问题

fine-log4j/src/main/java/com/fr/third/apache/log4j/DailyRollingFileAppender.java

@@ -320,6 +320,10 @@ public class DailyRollingFileAppender extends FileAppender {
       if (scheduledFilename.equals(datedFilename)) {
           return;
       }
+      synchronized (this) {
+          if (scheduledFilename.equals(datedFilename)) {
+              return;
+          }
 
           // close current file, and compress it to datedFilename
           this.closeFile();
@@ -346,11 +350,11 @@ public class DailyRollingFileAppender extends FileAppender {
                   gzos.write(inbuf, 0, n);
               }
               result = true;
-    } catch (Exception e){
+          } catch (Exception e) {
               LogLog.error("Compress " + fileName + " to " + scheduledFilename + " failed.");
               LogLog.error(e.getMessage(), e);
           } finally {
-        if(gzos!=null) {
+              if (gzos != null) {
                   gzos.close();
               }
               if (fis != null) {
@@ -358,26 +362,26 @@ public class DailyRollingFileAppender extends FileAppender {
               }
           }
 
-    if(result) {
+          if (result) {
               if (!file.delete()) {
                   LogLog.debug("file delete failed, empty it.");
                   emptyFile(file);
               }
-      LogLog.debug(fileName +" -> "+ scheduledFilename);
+              LogLog.debug(fileName + " -> " + scheduledFilename);
           } else {
-      LogLog.error("Failed to rename ["+fileName+"] to ["+scheduledFilename+"].");
+              LogLog.error("Failed to rename [" + fileName + "] to [" + scheduledFilename + "].");
           }
 
           try {
               // This will also close the file. This is OK since multiple
               // close operations are safe.
               this.setFile(fileName, true, this.bufferedIO, this.bufferSize);
-    }
-    catch(IOException e) {
-      errorHandler.error("setFile("+fileName+", true) call failed.");
+          } catch (IOException e) {
+              errorHandler.error("setFile(" + fileName + ", true) call failed.");
           }
           scheduledFilename = datedFilename;
       }
+  }
 
 
     /**