Problem with Confluene Upgrade

I'm trying to upgrade our Confluence environment from v3.5 to v4.0 (eventually, to v5x) and I'm running into a strage error on startup.

The catalina.out file just shows "INFO: Server startup in 1008473 ms"

In the browser I get:

Unable to start up Confluence. Fatal error during startup sequence: confluence.lifecycle.core:pluginframeworkdependentupgrades (Run all the upgrades that require the plugin framework to be available) - com.atlassian.confluence.content.render.xhtml.migration.exceptions.MigrationException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: org.owasp.validator.html.ScanException: java.io.IOException: The character '' is an invalid XML character

I have not been able to find any information on where to look for this error.

2 answers

1 accepted

1 vote
Accepted answer

There are some known issues when trying to upgrade from a certain version to another.

What is known to work well is to upgrade from Confluence version 3.5.17 to version 4/5.

So first, upgrade your Confluence 3.5 to the version 3.5.17, then upgarde to version 4.

We had upgraded to 3.5.13 (from 3.3.3) so I wasn't sure if we needed to go higher at the 3.5 level. I'll download 3.5.17 and do that upgrade first then try the 4 again.

Is there any value of going to 4.0 first or is it safe to go directly to 4.3.7 from 3.5.17??

Thanks Felipe, by going to 3.5.17 first, I was successfully able to upgrade to v4.3.7

Now the process of finding all the features and functions that no longer work can begin ;)

It's safe to go to the latest version. I've already jumped to the latest 5 version from 3.5.17

Suggest an answer

Log in or Sign up to answer
Community showcase
Posted Oct 24, 2018 in Confluence

Atlassian Research opportunity with Confluence templates

Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time!   We're looking for people to participate in a   remote 1-hr workshop...

1,067 views 16 14
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you