采用apache的commons-email包发送邮件死锁

来源：互联网发布：婚礼电子请柬软件编辑：程序博客网时间：2024/05/22 16:06

采用apache的commons-email包发邮件时候，程序卡住停顿了，使用jstack命令查看栈信息如下：

   java.lang.Thread.State: RUNNABLE    at java.net.SocketInputStream.socketRead0(Native Method)    at java.net.SocketInputStream.read(SocketInputStream.java:129)    at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110)    at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)    at java.io.BufferedInputStream.read(BufferedInputStream.java:237)    - locked <0x00000007fb055378> (a java.io.BufferedInputStream)    at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:88)    at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1589)    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1369)    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)    at javax.mail.Service.connect(Service.java:288)    - locked <0x00000007fb0515d8> (a com.sun.mail.smtp.SMTPTransport)    at javax.mail.Service.connect(Service.java:169)    at javax.mail.Service.connect(Service.java:118)    at javax.mail.Transport.send0(Transport.java:188)    at javax.mail.Transport.send(Transport.java:118)    at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)    at org.apache.commons.mail.Email.send(Email.java:1267)    at com.renren.zhaopin.mail.util.MailPostUtil.postMail(MailPostUtil.java:61)    at com.renren.zhaopin.mail.util.MailPostUtil.postMail(MailPostUtil.java:39)    at com.renren.xoa2.xiaozhao.mail.service.BaskGroundService$Consumer.waitConsumerEmail(BaskGroundService.java:212)    at com.renren.xoa2.xiaozhao.mail.service.BaskGroundService$Consumer.run(BaskGroundService.java:152)    at java.lang.Thread.run(Thread.java:662)

通过查找发现，原来是一台postfix邮件服务器挂了，导致一直占用io，而连接的时候，未设置超时等信息所致。

解决方法：

1）找到挂掉的服务器，去掉即可。

或

2）完善发送程序，发送代码中加入以下代码：

 email.setSocketTimeout(60*1000); email.setSocketConnectionTimeout(60*1000);