Hi,
There has been recently commits that allow a lost LDAP connection to be re initiated.

Not sure this will solve this issue, but if you want to give a try to the james server snapshot to be downloaded from https://repository.apache.org/content/repositories/snapshots/org/apache/james/apache-james/3.0-beta4-SNAPSHOT/


Thx,
Eric


On 12/02/12 20:14, Atherton, Cynthia wrote:
Hi! First time poster, so I hope I'm doing this correctly.

I have configured apache-james-3.0-beta2 to connect to an Active Directory 
instance. Everything seems to work correctly until I try to log in to my mail 
server (SquirrelMail) as a user that is stored in the Active Directory. At that 
point, I get the following in the james-server.log. I'm sure it's something 
that I have configured incorrectly in the userrepository.xml file. But, does 
anyone have any idea why it would throw a NullPointerException when processing 
the imap request?

DEBUG 12:01:26,842 | james.imapserver | ID=28556801 Got<command>: LOGIN
DEBUG 12:01:26,864 | james.imapserver | ID=28556801 Error while processing imap 
request
java.lang.NullPointerException
         at 
org.apache.james.user.ldap.ReadOnlyUsersLDAPRepository.buildUser(ReadOnlyUsersLDAPRepository.java:359)
         at 
org.apache.james.user.ldap.ReadOnlyUsersLDAPRepository.buildUserCollection(ReadOnlyUsersLDAPRepository.java:330)
         at 
org.apache.james.user.ldap.ReadOnlyUsersLDAPRepository.getUserByName(ReadOnlyUsersLDAPRepository.java:428)
         at 
org.apache.james.user.ldap.ReadOnlyUsersLDAPRepository.test(ReadOnlyUsersLDAPRepository.java:531)
         at 
org.apache.james.adapter.mailbox.store.UserRepositoryAuthenticator.isAuthentic(UserRepositoryAuthenticator.java:53)
         at 
org.apache.james.mailbox.store.StoreMailboxManager.login(StoreMailboxManager.java:228)
         at 
org.apache.james.mailbox.store.StoreMailboxManager.login(StoreMailboxManager.java:236)
         at 
org.apache.james.imap.processor.AbstractAuthProcessor.doAuth(AbstractAuthProcessor.java:56)
         at 
org.apache.james.imap.processor.LoginProcessor.doProcess(LoginProcessor.java:53)
         at 
org.apache.james.imap.processor.LoginProcessor.doProcess(LoginProcessor.java:36)
         at 
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:90)
         at 
org.apache.james.imap.processor.AbstractMailboxProcessor.process(AbstractMailboxProcessor.java:79)
         at 
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:73)
         at 
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:56)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:55)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:57)
         at 
org.apache.james.imapserver.netty.ImapChannelUpstreamHandler.messageReceived(ImapChannelUpstreamHandler.java:175)
         at 
org.jboss.netty.handler.stream.ChunkedWriteHandler.handleUpstream(ChunkedWriteHandler.java:148)
         at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:302)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:317)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:299)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:216)
         at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:302)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:317)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:299)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:216)
         at 
org.jboss.netty.handler.timeout.IdleStateAwareChannelHandler.handleUpstream(IdleStateAwareChannelHandler.java:48)
         at 
org.jboss.netty.handler.timeout.IdleStateHandler.messageReceived(IdleStateHandler.java:276)
         at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:302)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:317)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:299)
         at 
org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:216)
         at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:274)
         at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:261)
         at org.jboss.netty.channel.socket.oio.OioWorker.run(OioWorker.java:90)
         at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
         at java.lang.Thread.run(Thread.java:619)
INFO  12:01:26,896 | james.imapserver | ID=28556801 Connection closed for 
0:0:0:0:0:0:0:1 (0:0:0:0:0:0:0:1)

Thanks,

Cindy Atherton



--
eric | http://about.echarles.net | @echarles

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