在使用confluence时，准备配置个邮件提醒，如果文章有变化能够比较方便的提醒用户，一开始不是很熟悉JNDI是如何配置的，为了方便直接通过简单的图形界面方式配置的邮件服务器。
1.邮件服务器配置
首先是填写SMTP服务器相关的配置项，具体配置如下图所示：
完了以后再填写邮件服务器信息，配置如下所示：
测试邮件发送
配置好邮件服务器后，发送测试邮件时，一直报发送超时的错误，直接上问题日志吧，
com.atlassian.mail.MailException: javax.mail.MessagingException: Exception reading response;
nested exception is:
java.net.SocketTimeoutException: Read timed out
at com.atlassian.confluence.jmx.JmxSMTPMailServer.doSendWithMessageIdSupport(JmxSMTPMailServer.java:120)
at com.atlassian.confluence.jmx.JmxSMTPMailServer.send(JmxSMTPMailServer.java:79)
at com.atlassian.confluence.admin.actions.mail.SendTestEmailAction.execute(SendTestEmailAction.java:57)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:168)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
...........
...........
at org.apache.catalina.valves.StuckThreadDetectionValve.invoke(StuckThreadDetectionValve.java:206)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1533)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1489)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
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:2210)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1950)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at com.atlassian.confluence.jmx.JmxSMTPMailServer.doSendWithMessageIdSupport(JmxSMTPMailServer.java:102)
... 363 more
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:89)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2188)
... 369 more`
也在百度上找了一圈答案，大部分都是让换端口或者默认端口，基本上没有解决我的问题，后面我打算换成jndi的方式试试运气，步骤如下所示：
第一步：将WEB-INF/lib/邮件发送相关的jar包移到confluence下的lib目录下
关闭confluence服务
/etc/ini.d/confluence stop
迁移jar包,我的安装目录是默认目录：
/opt/atlassian/confluence/confluence/WEB-INF/lib/
所以我需要把这个目录的两个jar包javax.mail-api-1.6.2.jar javax.mail-1.6.2.jar移动到/opt/atlassian/confluence/lib下
第二步:修改server.xml配置文件
在</Context>前添加邮件发送配置信息
mail.debug="true"是为了查看发送邮件的调试信息
然后启动服务
/etc/ini.d/confluence start
然后再回到页面配置jndi
测试时再次报错，说是找不到mail，发现实Resource配置的位置不对，应该放在第一个</Context>前面，我放到第二个</Context>
修改后再次启动服务，还是报错，提示找不到
Caused by: java.lang.NoClassDefFoundError: javax/activation/DataSource
以前有配置过jira的邮件服务器，于是大概猜测是少了jar包
于是下载activation-1.1.1.jar到/opt/atlassian/confluence/lib目录下
将这个jar包的拥有者设置成confluence，执行
chown confluence:confluence activation-1.1.1.jar
再次启动confluence，测试邮件发送成功了
真可谓是一波三折，总算是解决了。
