Configuring System Properties

[Mathias Heilmann]

I'm currently trying to install a backup from our production Confluence to our testserver and got following problem: "Confluence will not start up because the build number in the home directory [4396] is newer than the Confluence build number [4394]."

Ok, I checked the documentation an it says to configure the system property com.atlassian.confluence.allow.downgrade=true

I went to the <confluence-install>/bin/setenv.sh (using Linux here) and edited the first line to:

JAVA_OPTS=" -Xms256m -Xmx512m -XX:MaxPermSize=256m $JAVA_OPTS -Djava.awt.headless=true com.atlassian.confluence.allow.downgrade=true "

The log (catalina.out) tells me that the main class com.atlassian.confluence.allow.downgrade=true couldn't been found.


[Luther Hargrove]

If using Confluence 4.3.2 and above and you need to start Confluence with an upgraded home directory, you need to set the com.atlassian.confluence.allow.downgrade system property to true.

If using a version of Confluence older than 4.3.2, you can change your build number in <Confluence-Home>/confluence.cfg.xml file as:
<buildNumber>1627</buildNumber>

That is the build number for Confluence v3.0.0_01. After it's corrected, restart Confluence.

[Mathias Heilmann]

I'm using Confluence 5+. What do you mean with "start Confluence with an upgraded home directory"? I tried to set the property to true, but I must have done something wrong as mentioned in the original post.