Creating a page containing the RSS macro may cause the server to hang against DB2

When saving a newly created page, the wiki-text is rendered in the same transaction in which the page has just been saved. If the page contains an RSS macro pointing back at the same Confluence server, it is possible that the RSS query (running in a separate transaction) will block waiting for the page-saving transaction to be committed.

So far, we have only encountered this problem under DB2.

A workaround is to run Confluence at "Read Uncommitted" isolation level by adding the following line to confluence.cfg.xml:

<property name="hibernate.connection.isolation">1</property>

This problem is fixed in Confluence 1.4.3, after upgrading to 1.4.3 or later the configuration property should be removed.