[JAMES-318] java.lang.NullPointerException when host is unknown

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: Remote Delivery
• Assignee: Noel J. Bergman
• Reporter: Hes Siemelink
• Created: 18/Aug/04 12:44
• Updated: 21/Nov/07 08:31
• Resolved: 03/Jan/06 21:54

Description

I encountered the following NullPointerException:

18/08/04 14:29:59 INFO James.Mailet : RemoteDelivery: Unknown gateway host: unknown host
18/08/04 14:29:59 INFO James.Mailet : RemoteDelivery: This could be a DNS server error or configuration error.
18/08/04 14:29:59 INFO James.Mailet : RemoteDelivery: Exception caught in RemoteDelivery.run()
java.lang.NullPointerException
at org.apache.james.transport.mailets.RemoteDelivery.deliver(RemoteDelivery.java:409)
at org.apache.james.transport.mailets.RemoteDelivery.run(RemoteDelivery.java:912)
at java.lang.Thread.run(Thread.java:534)

This is caused by logging information about a HostAddress that happens to be null.

The HostAddress is null because I had a misconfiguration in my config.xml: a gateway server that could not be found.
I fixed the issue for myself by entering the correct host name.

Still, NullPointerExceptions are a bad sign.

Also, the message seems to disappear from the queue. I can't find it in the spool directory and there is no attempt of delivery after a restart.
In other words, I seem to observe that a message gets lost when this occurs.