under INSTALL_ROOT/domains/domain1<what ever domainname>/config you should see a file called admin-keyfile. The only way I can think of a recovery here is you can do asadmin create-domain foo with your id/passwd. Copy the admin-keyfile from foo domain to the domain that's not working. You're ready to go now. I believe admin-keyfile is corrupted. Just replace it by creating another domain it's a hack but should work.
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