spring-integration - javax.mail.FolderClosedException : * BYE JavaMail Exception: javax.net.ssl.SSLException:IMAP 连接超时(读取失败)

Question

请帮我解决这个异常。我在我的 Spring Boot Java 应用程序中运行这个 IMAP 电子邮件监听器以从我的 gmail 收件箱中检索电子邮件

 return IntegrationFlows
         .from(Mail.imapIdleAdapter(imapUrl())
                   .autoStartup(true)
                   .javaMailProperties(p -> p.put("mail.imap.ssl.trust", "*")
                                             .put("mail.imap.ssl.enable", "true"))
                   .shouldMarkMessagesAsRead(false)
                   .shouldDeleteMessages(false)
                   .shouldReconnectAutomatically(true)
                   .autoCloseFolder(false))
         .handle(m-> myService.process(MimeMessage))
         .get();

偶尔我在更高的环境中会得到以下异常

 javax.mail.FolderClosedException: * BYE JavaMail Exception:
 javax.net.ssl.SSLException: Connection timed out (Read failed)
     at com.sun.mail.imap.IMAPFolder.handleIdle(IMAPFolder.java:3316)

导致

2020-05-20 18:06:27.264  WARN 1 --- [ask-scheduler-1] o.s.i.mail.ImapIdleChannelAdapter        : Failed to execute IDLE task. Will attempt to resubmit in 10000 milliseconds.

我想知道您建议如何处理这个问题？通过使用“mail.timeout”属性戳 gmail 服务器？或者有其他推荐的方法吗？再次感谢!

Answer 1

请参阅 Max 的评论。我同意:我们失去连接真的很正常。查看该警告消息:

Failed to execute IDLE task. Will attempt to resubmit in 10000 milliseconds.

它按逻辑执行:

this.receivingTask = scheduler.schedule(new ReceivingTask(), this.receivingTaskTrigger);

...

private class ReceivingTask implements Runnable {

    ReceivingTask() {
    }

    @Override
    public void run() {
        if (isRunning()) {
            try {
                ImapIdleChannelAdapter.this.idleTask.run();
                logger.debug("Task completed successfully. Re-scheduling it again right away.");
            }
            catch (Exception e) { //run again after a delay
                if (logger.isWarnEnabled()) {
                    logger.warn("Failed to execute IDLE task. Will attempt to resubmit in "
                            + ImapIdleChannelAdapter.this.reconnectDelay + " milliseconds.", e);
                }
                ImapIdleChannelAdapter.this.receivingTaskTrigger.delayNextExecution();
                publishException(e);
            }
        }
    }

}