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POSpring Integration Pop3MailReceiver stops polling silently without logging why
 

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    <p><strong>Problem</strong></p> <p>I have a very basic configuration for a Spring integration mail adapter setup (below is the relevant sample):</p> <pre><code>&lt;int:channel id="emailChannel"&gt; &lt;int:interceptors&gt; &lt;int:wire-tap channel="logger"/&gt; &lt;/int:interceptors&gt; &lt;/int:channel&gt; &lt;mail:inbound-channel-adapter id="popChannel" store-uri="pop3://user:password@domain.net/INBOX" channel="emailChannel" should-delete-messages="true" auto-startup="true"&gt; &lt;int:poller max-messages-per-poll="1" fixed-rate="30000"/&gt; &lt;/mail:inbound-channel-adapter&gt; &lt;int:logging-channel-adapter id="logger" level="DEBUG"/&gt; &lt;int:service-activator input-channel="emailChannel" ref="mailResultsProcessor" method="onMessage" /&gt; </code></pre> <p>This is working fine the majority of the time and I can see the logs showing the polling (and it works fine hooking into my mailResultsProcessor when a mail is there):</p> <pre><code>2013-08-13 08:19:29,748 [task-scheduler-3] DEBUG org.springframework.integration.mail.Pop3MailReceiver - opening folder [pop3://user:password@fomain.net/INBOX] 2013-08-13 08:19:29,796 [task-scheduler-3] INFO org.springframework.integration.mail.Pop3MailReceiver - attempting to receive mail from folder [INBOX] 2013-08-13 08:19:29,796 [task-scheduler-3] DEBUG org.springframework.integration.mail.Pop3MailReceiver - found 0 new messages 2013-08-13 08:19:29,796 [task-scheduler-3] DEBUG org.springframework.integration.mail.Pop3MailReceiver - Received 0 messages 2013-08-13 08:19:29,893 [task-scheduler-3] DEBUG org.springframework.integration.endpoint.SourcePollingChannelAdapter - Received no Message during the poll, returning 'false' </code></pre> <p>The problem I have is that the polling stops during the day, with no indication in the logs why it has stopped working. The only reason I can tell is the debug above is not present in the logs and E-Mails build up on the E-Mail account.</p> <p><strong>Questions</strong></p> <ul> <li>Has anyone seen this before and know how to resolve it? </li> <li>Is there a change that I can make in my configuration to capture the issue into the log? I thought the logging channel adapter set to debug would have this covered. </li> </ul> <p><em>Using version 2.2.3.RELEASE of Spring Integration on Tomcat 7, logs output default to catalina.out. Deployed on AWS standard tomcat 7 instance.</em></p>
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