Random selenium test failures are being caused by the auiplugin failing to load after 60 seconds. However, this timeout is always preceded by:

WARN admin 58476x2493x1 opcmfn /secure/admin/XmlRestore.jspa [plugin.osgi.factory.OsgiPlugin] Ignoring the Spring context that was just created for plugin com.atlassian.auiplugin.  
The plugin is in an invalid state, INSTALLED, that doesn't support a transition to enabled.  Most likely, it was disabled due to a timeout.

i.e. the warning about the plugin's invalid state happens before the plugin is disabled

This seems to sometimes happen with the oauth service provider plugin as well.

Other points of interest:

• the auiplugin eventually gets re-enabled in subsequent tests for the run, e.g. test 1 fails because of this, but test 2 will pass and the auiplugin looks to be enabled successfully
• this seems to have happened after plugins were upgraded from 2.4.0.beta5 to 2.4.0.rc4

See:

• https://jira.bamboo.atlassian.com/browse/SEL-ENTFFOX35BATCH09-41/artifact/Cargo-Logs/TEST-com.atlassian.jira.webtest.selenium.harness.SeleniumTestHarness.txt (line 21199, 21452) for an example of auiplugin failures
• https://jira.bamboo.atlassian.com/browse/SEL-ENTFFOX35BATCH09-41/
• https://jira.bamboo.atlassian.com/browse/SEL-ENTFFOX2-1558/artifact/Cargo-Logs/TEST-com.atlassian.jira.webtest.selenium.harness.SeleniumTestHarness.txt (line 168745,168998 warning, 67 mb file) for an example of oauth service provider plugin failures. Other auiplugin failures also present in this file