Instances Non synchronized

Hi,

I don't know  the reason WLS isntances doesn't synchronized, no update files, after restart there were error message:

Warning

The webserver configuration on the remote node is out of date and needs to be synchronized.

NOTE: This web application may need to be restarted after synchronization to begin using the new settings.

The following file(s) are out of date and will be synchronized:

jdelog.properties

thanks in advance