Camel endpoint suddenly throws `FolderClosedIOException`

Issue

• Camel endpoint suddenly throws FolderClosedIOException

  Caused by: com.sun.mail.util.FolderClosedIOException
      at com.sun.mail.imap.IMAPInputStream.forceCheckExpunged(IMAPInputStream.java:100) [mail-1.4.5.redhat-2.jar:1.4.5.redhat-2]
      at com.sun.mail.imap.IMAPInputStream.fill(IMAPInputStream.java:150) [mail-1.4.5.redhat-2.jar:1.4.5.redhat-2]
      at com.sun.mail.imap.IMAPInputStream.read(IMAPInputStream.java:182) [mail-1.4.5.redhat-2.jar:1.4.5.redhat-2]
      at java.io.FilterInputStream.read(FilterInputStream.java:83) [rt.jar:1.8.0_141]
      at java.io.PushbackInputStream.read(PushbackInputStream.java:139) [rt.jar:1.8.0_141]
      at com.sun.mail.util.QPDecoderStream.read(QPDecoderStream.java:86) [mail-1.4.5.redhat-2.jar:1.4.5.redhat-2]
      at com.sun.mail.util.QPDecoderStream.read(QPDecoderStream.java:165) [mail-1.4.5.redhat-2.jar:1.4.5.redhat-2]
      at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) [rt.jar:1.8.0_141]
      at java.io.BufferedInputStream.read(BufferedInputStream.java:265) [rt.jar:1.8.0_141]