Javamail與Gmail的IMAP連接在隨機時間後丟棄

我正在使用Javamail向gmail imap服務器進行身份驗證，並一次獲取完整郵箱的一個郵件標頭並在本地索引。對於信息很少的收件箱，這可以正常工作。對於郵件總數超過10k的收件箱，javamail imap連接將被刪除（可能通過服務器）。需要注意的是這個持續時間是隨機的。Javamail與Gmail的IMAP連接在隨機時間後丟棄

由於我不斷地獲取郵件標題一個接一個，沒有時間連接空閒很長時間，所以它不能超時。

------------------------------代碼--------------- -----------------

IMAPSSLStore imapSslStore = connectToImap("imap.googlemail.com", 993, email, oauthToken, oauthTokenSecret, getMyConsumer(), true); 
System.out.println("Successfully authenticated to IMAP.\n"); 
Folder inbox = imapSslStore.getFolder("[Gmail]/All Mail"); 
inbox.open(Folder.READ_ONLY); 

Message messages[] = inbox.getMessages(); 

for(Message message:messages) { 
    System.out.println(message); 
    System.out.println("MSG NO:"+message.getMessageNumber()); 
    System.out.println("FROM:"+message.getFrom().toString()); 
}

-------------------------- - - -碼 - - - - - - - - - - - - - - - - - - - - - -

異常跟蹤：

[java] javax.mail.FolderClosedException: * BYE JavaMail Exception: java.io.IOException: **Connection dropped by server?** 

[java] at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:194) 
[java] at org.apache.tools.ant.taskdefs.Java.run(Java.java:747) 
[java] at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:201) 
[java] at org.apache.tools.ant.taskdefs.Java.execute(Java.java:104) 
[java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
[java] at java.lang.reflect.Method.invoke(Method.java:597) 
[java] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) 
[java] at org.apache.tools.ant.Task.perform(Task.java:348) 
[java] at org.apache.tools.ant.Target.execute(Target.java:357) 
[java] at org.apache.tools.ant.Target.performTasks(Target.java:385) 
[java] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329) 
[java] at org.apache.tools.ant.Project.executeTarget(Project.java:1298) 
[java] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
[java] at org.apache.tools.ant.Project.executeTargets(Project.java:1181) 
[java] at org.apache.tools.ant.Main.runBuild(Main.java:698) 
[java] at org.apache.tools.ant.Main.startAnt(Main.java:199) 
[java] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257) 
[java] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104) 
[java] Caused by: javax.mail.FolderClosedException: * BYE JavaMail Exception: java.io.IOException: Connection dropped by server? 
[java] at com.sun.mail.imap.IMAPMessage.loadEnvelope(IMAPMessage.java:1198) 
[java] at com.sun.mail.imap.IMAPMessage.getFrom(IMAPMessage.java:233) 
[java] at com.google.code.samples.xoauth.XoauthAuthenticator.main(XoauthAuthenticator.java:209) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
[java] at java.lang.reflect.Method.invoke(Method.java:597) 
[java] at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:217) 
[java] at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:152) 
[java] ... 20 more 
[java] --- Nested Exception --- 
[java] javax.mail.FolderClosedException: * BYE JavaMail Exception: java.io.IOException: Connection dropped by server? 
[java] at com.sun.mail.imap.IMAPMessage.loadEnvelope(IMAPMessage.java:1198) 
[java] at com.sun.mail.imap.IMAPMessage.getFrom(IMAPMessage.java:233) 
[java] at com.google.code.samples.xoauth.XoauthAuthenticator.main(XoauthAuthenticator.java:209) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
[java] at java.lang.reflect.Method.invoke(Method.java:597) 
[java] at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:217) 
[java] at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:152) 
[java] at org.apache.tools.ant.taskdefs.Java.run(Java.java:747) 
[java] at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:201) 
[java] at org.apache.tools.ant.taskdefs.Java.execute(Java.java:104) 
[java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
[java] at java.lang.reflect.Method.invoke(Method.java:597) 
[java] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) 
[java] at org.apache.tools.ant.Task.perform(Task.java:348) 
[java] at org.apache.tools.ant.Target.execute(Target.java:357) 
[java] at org.apache.tools.ant.Target.performTasks(Target.java:385) 
[java] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329) 
[java] at org.apache.tools.ant.Project.executeTarget(Project.java:1298) 
[java] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
[java] at org.apache.tools.ant.Project.executeTargets(Project.java:1181) 
[java] at org.apache.tools.ant.Main.runBuild(Main.java:698) 
[java] at org.apache.tools.ant.Main.startAnt(Main.java:199) 
[java] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257) 
[java] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)

我使用的是獨立版本的JavaMail的（1.4.3），我現在努力解決這一問題了一會兒。任何幫助表示讚賞。

來源

2010-10-16 Nands

你能最終解決這個問題嗎？我打算使用這個以及... – Theo 2011-07-20 13:50:47

不幸的是，這仍然是一個問題。我們只需要在Google BYE之後重新嘗試。 – 2013-10-15 00:00:21

@SaqibAli你試過我的解決方案嗎？ – 2013-10-16 21:07:27

您需要捕獲FolderClosedException，然後嘗試再次連接。我遇到過這個問題，並通過下面的代碼解決它：

catch (FolderClosedException ex) { 
         ex.printStackTrace(); 
         ConnectPop3(Username, Password); 
         if (!folder.isOpen()) { 
          folder.open(Folder.READ_ONLY); 
          messages = folder.getMessages(); 
         } 
        }

來源

2011-12-28 04:47:06

Javamail與Gmail的IMAP連接在隨機時間後丟棄

回答

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