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Spring Boot 電子郵件發送拋出 SocketTimeoutException：讀取超時

[英]Spring Boot email sending throws SocketTimeoutException: Read timed out

 原文  2018-06-23 05:21:09  8   2    java/ spring/ email/ spring-boot/ smtp

問題描述

我已經研究了這個話題幾天了，但我在網上找到的答案都沒有對我有用。

上下文：我有一個 Spring Boot Web 應用程序，它使用 Java Mail API 和 Spring Boot Starter Mail 發送自動電子郵件通知。

它使用帶有 GSuite 帳戶的 GMail SMTP 服務器。 我最近升級為使用 Spring 5.0.6 和 Spring Boot 2.0.2，並且電子郵件發送停止工作。

幾個線索：

  • 發送電子郵件的 Java 代碼與之前相同
  • Gmail SMTP 仍然正常工作（從另一個使用具有相同設置和身份驗證的舊版本應用程序的虛擬機，電子郵件可以正確發送）。
  • 除非我遺漏了一些東西，否則應用程序配置與以前相同

已經改變的事情：

  • 升級到 Spring 5.0.6
  • 升級到 Spring Boot 2.0.2
  • 在 Java 代碼中的許多地方進行更改以匹配此升級並在應用程序的其他部分添加功能
  • VM 的 IP 地址與以前不同（AWS EC2 實例）

以下是 pom.xml 中的相關依賴項：

    <!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>javax.mail-api</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>

這是與 Spring 郵件相關的 application.yml：

spring:
  mail:
    host: ${FT_MAIL_SMTP_HOST}
     port: ${FT_MAIL_SMTP_PORT}
     username: ${FT_MAIL_SMTP_USERNAME}
     password: ${FT_MAIL_SMTP_PASSWORD}
     debug: false
     properties:
       mail:
         smtp:
           starttls:
             enable: ${FT_MAIL_SMTP_STARTTLS}
             required: ${FT_MAIL_SMTP_TLSREQUIRED}
           auth: ${FT_MAIL_SMTP_AUTH}
           connectiontimeout: ${FT_MAIL_SMTP_CONN_TIMEOUT}
           timeout: ${FT_MAIL_SMTP_TIMEOUT}
           writetimeout: ${FT_MAIL_SMTP_WRITE_TIMEOUT}

這些變量在環境中定義：

FT_MAIL_SMTP_HOST=smtp.gmail.com
FT_MAIL_SMTP_PORT=587
FT_MAIL_SMTP_USERNAME=myaccount@myapp.com
FT_MAIL_SMTP_PASSWORD=mypassword

FT_MAIL_SMTP_STARTTLS=true
FT_MAIL_SMTP_TLSREQUIRED=true
FT_MAIL_SMTP_AUTH=true
FT_MAIL_SMTP_CONN_TIMEOUT=5000
FT_MAIL_SMTP_TIMEOUT=5000
FT_MAIL_SMTP_WRITE_TIMEOUT=5000

這是用於發送電子郵件的 Spring @Service（未更改）：

@Service
public class EmailServiceImpl {

@Autowired
public JavaMailSender emailSender;

@Autowired
private SpringTemplateEngine templateEngine;

@Value("${myapp.mail.from}")
private String fromAddress;

@Value("${myapp.mail.replyto}")
private String replyToAddress;

public void sendTemplatedMessage(String template, String to, String subject, Map<String, Object> model) throws MailException, MessagingException {  
    sendTemplatedMessage(template, to, fromAddress, replyToAddress, subject, model);
}

public void sendTemplatedMessage(String template, String to, String from, String subject, Map<String, Object> model) throws MailException, MessagingException { 
    sendTemplatedMessage(template, to, from, replyToAddress, subject, model);
}

private void sendTemplatedMessage(String template, String to, String from, String replyTo, String subject, Map<String, Object> model) throws MailException, MessagingException {    

    MimeMessage message = emailSender.createMimeMessage();

    MimeMessageHelper helper = new MimeMessageHelper(message,
            MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,
            StandardCharsets.UTF_8.name());

    //helper.addAttachment("logo.png", new ClassPathResource("memorynotfound-logo.png"));
    Context context = new Context();
    context.setVariables(model);
    String html = templateEngine.process(template, context);

    helper.setTo(to);
    helper.setFrom(from);
    helper.setReplyTo(from);
    helper.setSubject(subject);
    helper.setText(html, true);

    emailSender.send(message);
}

public void sendSimpleMessage(String to, String from, String subject, String text) {
    try {           
        SimpleMailMessage message = new SimpleMailMessage(); 
        message.setTo(to);
        message.setFrom(from);
        message.setSubject(subject); 
        message.setText(text);
        emailSender.send(message);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
}

現在這是我嘗試發送電子郵件時遇到的錯誤：

04:42:19.900 [https-jsse-nio-443-exec-3] ERROR c.f.controller.StayController - Could not send Guest confirmation email to gfgorostidi@protonmail.com
org.springframework.mail.MailSendException: Failed to close server connection after message sending; nested exception is javax.mail.MessagingException: Exception reading response;
  nested exception is:
 java.net.SocketTimeoutException: Read timed out
 at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:482)
 at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:359)
 at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:354)
 at com.myapp.util.EmailServiceImpl.sendTemplatedMessage(EmailServiceImpl.java:61)
 at com.myapp.util.EmailServiceImpl.sendTemplatedMessage(EmailServiceImpl.java:35)
 at com.myapp.controller.StayController.sendConfirmEmailToGuest(StayController.java:437)
 at com.myapp.controller.StayController.saveStay(StayController.java:383)
 at com.myapp.controller.StayController.createStay(StayController.java:163)
 at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 ......
 ......
 ......
 at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
 at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
 at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: javax.mail.MessagingException: Exception reading response;
  nested exception is:
 java.net.SocketTimeoutException: Read timed out
 at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2202)
 at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1212)
 at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:473)
 ... 104 more
Caused by: java.net.SocketTimeoutException: Read timed out
 at java.base/java.net.SocketInputStream.socketRead0(Native Method)
 at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
 at java.base/java.net.SocketInputStream.read(SocketInputStream.java:171)
 at java.base/java.net.SocketInputStream.read(SocketInputStream.java:141)
 at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:425)
 at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:65)
 at java.base/sun.security.ssl.SSLSocketImpl.bytesInCompletePacket(SSLSocketImpl.java:918)
 at java.base/sun.security.ssl.AppInputStream.read(AppInputStream.java:144)
 at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:124)
 at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
 at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:271)
 at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:89)
 at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2182)
 ... 106 more
org.springframework.mail.MailSendException: Failed to close server connection after message sending; nested exception is javax.mail.MessagingException: Exception reading response;
  nested exception is:
 java.net.SocketTimeoutException: Read timed out
 at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:482)
 at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:359)
 at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:354)
 at com.myapp.util.EmailServiceImpl.sendTemplatedMessage(EmailServiceImpl.java:61)
 at com.myapp.util.EmailServiceImpl.sendTemplatedMessage(EmailServiceImpl.java:35)
 at com.myapp.controller.StayController.sendConfirmEmailToGuest(StayController.java:437)
 at com.myapp.controller.StayController.saveStay(StayController.java:383)
 at com.myapp.controller.StayController.createStay(StayController.java:163)
 at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 ......
 ......
 ......
 at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
 at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
 at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
 at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: javax.mail.MessagingException: Exception reading response;
  nested exception is:
 java.net.SocketTimeoutException: Read timed out
 at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2202)
 at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1212)
 at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:473)
 ... 104 more
Caused by: java.net.SocketTimeoutException: Read timed out
 at java.base/java.net.SocketInputStream.socketRead0(Native Method)
 at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
 at java.base/java.net.SocketInputStream.read(SocketInputStream.java:171)
 at java.base/java.net.SocketInputStream.read(SocketInputStream.java:141)
 at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:425)
 at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:65)
 at java.base/sun.security.ssl.SSLSocketImpl.bytesInCompletePacket(SSLSocketImpl.java:918)
 at java.base/sun.security.ssl.AppInputStream.read(AppInputStream.java:144)
 at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:124)
 at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
 at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:271)
 at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:89)
 at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2182)
 ... 106 more

我曾嘗試設置不正確的 SMTP 服務器或錯誤的憑據，這導致連接失敗，因此我假設服務器和憑據是正確的，並且在成功連接后發生錯誤。

使用的帳戶尚未達到其限制，因為另一個 VM 使用相同的憑據並毫無問題地發送電子郵件。

我嘗試將“啟動 TLS”設置更改為 false 並改用端口 465，但這也不起作用。

任何幫助表示贊賞！ 提前致謝！

2 個解決方案

解決方案1
 4 已采納  2018-06-23 09:00:12

在對配置進行了多次反復試驗后，我發現它在配置中需要一個應用程序屬性“spring.mail.protocol”。

我在 application.yml 中添加了線路protocol: smtp ：

spring:
  mail:
    protocol: smtp

並且解決了讀取超時問題，現在可以正確發送電子郵件。 希望將來可以幫助某人。

解決方案2
 1  2020-06-03 17:05:03

我確實遇到了同樣的問題，但我的情況有點不同

我試圖使用石英按計划方式發送

當我不使用 Quartz 時，一切正常，但是使用 Quartz 時它開始出現故障

上述解決方案對我沒有幫助，但為我指明了查看我設置的屬性的方向。

增加連接超時對我有用

從而改變了應用程序屬性

從：

spring.mail.properties.mail.smtp.timeout=3000

到：

spring.mail.properties.mail.smtp.timeout=25000

希望它也適用於其他人

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