MailConsumer throws exception on line 113
-----------------------------------------
Key: CAMEL-1263
URL: https://issues.apache.org/activemq/browse/CAMEL-1263
Project: Apache Camel
Issue Type: Bug
Components: camel-mail
Affects Versions: 1.5.0
Environment: Camel
Reporter: Michael Chen
When the mail box is empty (no mail available), MailConsumer throws the
following exception on line 113. It happens for both pop3 and imap protocols
(Java Mail API 1.4.1 Sun implementation).
Regardless the cause, closing the folder should be enclosed in a try/catch
block and ignore any exception thrown, because it is no longer interesting to
the client application. It can surely log the exception, but shouldn't throw
it.
[java] javax.mail.MessagingException: A6 NO Mailbox is locked by POP
server;
[java] nested exception is:
[java] com.sun.mail.iap.CommandFailedException: A6 NO Mailbox is
locked by POP server
[java] at com.sun.mail.imap.IMAPFolder.close(IMAPFolder.java:1128)
[java] at com.sun.mail.imap.IMAPFolder.close(IMAPFolder.java:1055)
[java] at
org.apache.camel.component.mail.MailConsumer.poll(MailConsumer.java:113)
[java] at
org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:66)
[java] at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
[java] at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
[java] at
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
[java] at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
[java] at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
[java] at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
[java] at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
[java] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
[java] at java.lang.Thread.run(Thread.java:619)
[java] Caused by: com.sun.mail.iap.CommandFailedException: A6 NO Mailbox
is locked by POP server
[java] at com.sun.mail.iap.Protocol.handleResult(Protocol.java:341)
[java] at com.sun.mail.iap.Protocol.simpleCommand(Protocol.java:363)
[java] at
com.sun.mail.imap.protocol.IMAPProtocol.close(IMAPProtocol.java:976)
[java] at com.sun.mail.imap.IMAPFolder.close(IMAPFolder.java:1125)
[java] ... 12 more
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