I'm getting this exception:
ERROR [MailActivation] Failed to execute folder check, spec=MailActivationSpec(mailServer=10.0.*.*, storeProtocol=imap, mailFolder=INBOX, pollingInterval=60000, messageSelector=null, userName=*, maxMessages=1) javax.mail.NoSuchProviderException: Invalid protocol: null at javax.mail.Session.getProvider(Session.java:412) at javax.mail.Session.getStore(Session.java:511) at javax.mail.Session.getStore(Session.java:491) at javax.mail.Session.getStore(Session.java:477) at org.jboss.resource.adapter.mail.inflow.MailFolder.open(MailFolder.java:69) at org.jboss.resource.adapter.mail.inflow.MailActivation.run(MailActivation.java:121) at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204) at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:275) at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:743) at java.lang.Thread.run(Thread.java:595)when jboss tries to get mail for transferring to my mdb. It happans occasionally. I can't find any pattern yet.