我有一个使用javax.mail发送电子邮件的应用程序。我正确地进行了配置，并且能够正常发送电子邮件。这里的问题是，在Debian实例下，信任库验证有时会失败并导致失败，最终甚至根本不会发送电子邮件。我使用亚马逊ses电子邮件发送服务。既然代码可以正常工作，我有什么办法可以阻止这种偶然的异常？
异常消息为：
javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors paramete
r must be non-empty
2020-10-07 10:01:47,739 at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2046)
2020-10-07 10:01:47,739 at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:711)
2020-10-07 10:01:47,739 at javax.mail.Service.connect(Service.java:388)
2020-10-07 10:01:47,739 at javax.mail.Service.connect(Service.java:246)
2020-10-07 10:01:47,739 at javax.mail.Service.connect(Service.java:195)
2020-10-07 10:01:47,739 at javax.mail.Transport.send0(Transport.java:254)
2020-10-07 10:01:47,739 at javax.mail.Transport.send(Transport.java:124)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.Connectivity.submitEmail(Connectivity.java:2089)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.Connectivity.sendAssertion(Connectivity.java:2025)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.datafetch.ClientDataFetcher.getFormJoins(ClientDataFetcher.java:880)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.datafetch.ClientDataFetcher.getProductFetch(ClientDataFetcher.java:408)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.MainClass.jobExecution(MainClass.java:3363)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.MainClass.<init>(MainClass.java:1438)
2020-10-07 10:01:47,739 at com.mapfintech.systemlink.MainClass.main(MainClass.java:349)
2020-10-07 10:01:47,740 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2020-10-07 10:01:47,740 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2020-10-07 10:01:47,740 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2020-10-07 10:01:47,740 at java.lang.reflect.Method.invoke(Method.java:498)
2020-10-07 10:01:47,740 at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:282)
2020-10-07 10:01:47,740 at java.lang.Thread.run(Thread.java:748)
2020-10-07 10:01:47,740 Caused by: javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
2020-10-07 10:01:47,740 at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
2020-10-07 10:01:47,740 at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959)
2020-10-07 10:01:47,740 at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1916)
2020-10-07 10:01:47,740 at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1899)
2020-10-07 10:01:47,740 at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1420)
2020-10-07 10:01:47,740 at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
2020-10-07 10:01:47,740 at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:598)
2020-10-07 10:01:47,740 at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:525)
2020-10-07 10:01:47,740 at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2041)
2020-10-07 10:01:47,740 ... 19 more
2020-10-07 10:01:47,740 Caused by: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
2020-10-07 10:01:47,740 at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:91)
2020-10-07 10:01:47,740 at sun.security.validator.Validator.getInstance(Validator.java:179)
2020-10-07 10:01:47,740 at sun.security.ssl.X509TrustManagerImpl.getValidator(X509TrustManagerImpl.java:312)
2020-10-07 10:01:47,740 at sun.security.ssl.X509TrustManagerImpl.checkTrustedInit(X509TrustManagerImpl.java:171)
2020-10-07 10:01:47,740 at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:184)
2020-10-07 10:01:47,741 at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
2020-10-07 10:01:47,741 at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1596)
2020-10-07 10:01:47,741 at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
2020-10-07 10:01:47,741 at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
2020-10-07 10:01:47,741 at sun.security.ssl.Handshaker.process_record(Handshaker.java:987)
2020-10-07 10:01:47,741 at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
2020-10-07 10:01:47,741 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
2020-10-07 10:01:47,741 at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
2020-10-07 10:01:47,741 ... 23 more
2020-10-07 10:01:47,741 Caused by: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
2020-10-07 10:01:47,741 at java.security.cert.PKIXParameters.setTrustAnchors(PKIXParameters.java:200)
2020-10-07 10:01:47,741 at java.security.cert.PKIXParameters.<init>(PKIXParameters.java:120)
2020-10-07 10:01:47,741 at java.security.cert.PKIXBuilderParameters.<init>(PKIXBuilderParameters.java:104)
2020-10-07 10:01:47,741 at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:89)
2020-10-07 10:01:47,741 ... 35 more
我的代码是：
static boolean email(String subject, String text, String attachmnt, Boolean switchReceiver) {
boolean res = false;
Properties propertiess = new Properties();
propertiess.put("mail.smtp.auth", "true");
propertiess.put("mail.smtp.host", mailSmtpHost);
propertiess.put("mail.smtp.port", "587");
// propertiess.put("mail.smtp.starttls.enable", "false");
// Get the Session object.1
Session sess = Session.getInstance(propertiess, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(mailUsername, mailPassword);
}
});
try {
// Header part
Message messg = new MimeMessage(sess);
String hostname = null;
try {
hostname = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e) {
e.printStackTrace();
}
messg.setFrom(new InternetAddress(mailFrom, hostname + " Notifications"));
if (switchReceiver) {
messg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(mailToAssertion));
} else {
messg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(mailTo));
}
messg.setSubject(subject);
// Body part
BodyPart messgBodyPart = new MimeBodyPart();
messgBodyPart.setText(text);
Multipart mltp = new MimeMultipart();
mltp.addBodyPart(messgBodyPart);
if (attachmnt != null) {
// Attachment
messgBodyPart = new MimeBodyPart();
DataSource srcc = new FileDataSource(attachmnt);
messgBodyPart.setDataHandler(new DataHandler(srcc));
messgBodyPart.setFileName(attachmnt);
mltp.addBodyPart(messgBodyPart);
}
// Add content
messg.setContent(mltp);
// Send messg
Transport.send(messg);
System.out.println("Sent messg succeed!");
res = true;
} catch (Exception exp) {
exp.printStackTrace();
return false;
}
return res;
}