When using logback under Windows over Oracle Application Server, if you redeploy the web application, the log file is keep open by some reason so when a new rollover happens it fails to rename the log file.

Currently RenameUtil does:

• Try to rename log file.
• If rename fails then rename by copy (copy plus delete).

If for some reason deletion fails the log file keeps all its content so I just added a truncate if deletion fails:

• Try to rename log file.
• If rename fails then rename by copy (copy plus delete).
• If delete fails then truncate file.

I do have a patch file if it's useful.