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Problem with Confluene Upgrade

Robert M

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.

Accepted answers

Felipevsw

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.

All comments

Felipevsw

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.

Robert M

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??

Felipevsw

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

Robert M

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

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