Unknown cluster host credentials

Hi,
I have a fresh install of 11gR2 clusterware and RAC database on linux x86-64 (two nodes). Everything looks pretty fine so far.
When using database control, there are, under cluster -> Adminstration links to Server Pools, Resources and Resource Types.
When clicking on those entries, database control asks for "Cluster Host Credentials". I have no idea which account to use. I've tried all the accounts which came across during installation, but none of these work.
Any help is appreciated.
Thanks, Hannes

Rob,
thanks for your reply. I already tried the user who installed the clusterware. Unfortunately it doesn't work. Root is not the installation user.
Best, Hannes

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Jul 15, 2009 10:50:35 AM org.apache.catalina.core.StandardWrapperValve invoke
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If anyone needs any other details feel free to ask.
Any help or any pointers to a place to find a solution would be deeply appreciated
Thanks

All I can see is that you are running this in a web application. In most web application containers there's a place where you configure your mail providers and mail sessions. You seem to be ignoring that (you aren't using JNDI to get a session for example) but you are getting the default instance, so perhaps that uses that configuration anyway.

MessagingException "Unknown SMTP host"

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