Upgrade from Confluence 3.5.4 to 4.3.2

I have successfully upgrade from confluence 3.5.4 to 4.0 version, by using new version jdk, that’s from jdk1.6.0_25 to jdk1.7.0_01. But, if I want to upgrade to confluence 4.3.2, the web shows error as following:

And there are nothing useful messages in syslog, so how to fix this error? Thanks a lot.

Are there no messages at all in the syslog or you just consider them meaningless? Could you post the log file?

If no message at all, try to restore your Confluence to pre-upgrade state as the message said, then turn on the debug logs before trying the upgrade again:

(The “Permanently change logging level in the properties file” part)