session共享经验分享
2015-05-20 01:59
169 查看
session共享
1.增加jar包丢到CATALINA.HOME/lib
======================================
tomcat-catalina-7.0.57.jar
tomcat-jasper-7.0.57.jar
tomcat-servlet-api-7.0.57.jar
jedis-2.6.2.jar
commons-pool2-2.3.jar
tomcat-redis-session-0.8.jar
======================================
2.配置全局上下文
CATALINA.HOME/conf/context.xml
1) jndi方式 <Manager className="ru.zinin.redis.session.RedisManager" jedisJndiName="custom/jndi/path"/>
2）普通方式 <Manager className="ru.zinin.redis.session.RedisManager" redisHostname="172.16.3.14" redisPort="6379" redisTimeout="10000" />
资料参见：https://github.com/zinin/tomcat-redis-session
1.将插件部署上原项目时，发现调用接口报如下错误
2015-5-1921:16:23 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() forservlet [spring-mvc] in context with path [/heika-mobile] threw exception
java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:909)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:238)
atcom.heika.security.VersionedUsernamePasswordAuthenticationFilter.attemptAuthentication(VersionedUsernamePasswordAuthenticationFilter.java:48)
atorg.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:194)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
atorg.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
atorg.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:184)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:155)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.heika.mobile.servlet.CheckRequiredParametersFilter.doFilter(CheckRequiredParametersFilter.java:63)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.heika.mobile.servlet.PrintParametersFilter.doFilter(PrintParametersFilter.java:49)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
2015-5-1921:16:23 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() forservlet jsp threw exception
java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:229)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:575)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:520)
at org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:147)
at org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:126)
at org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:112)
at org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:65)
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:53)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:488)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:476)
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:345)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:437)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:208)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
2015-5-1921:16:23 org.apache.catalina.core.StandardHostValve custom
严重: Exception ProcessingErrorPage[errorCode=500, location=/err/500.jsp]
org.apache.jasper.JasperException:javax.servlet.ServletException:java.lang.IllegalStateException:
Can't getexpireAt from redis.
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:488)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:476)
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:345)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:437)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:208)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
Caused by:javax.servlet.ServletException:java.lang.IllegalStateException:
Can't getexpireAt from redis.
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:80)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
... 24 more
Caused by:java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:229)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:575)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:520)
at org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:147)
at org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:126)
at org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:112)
at org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:65)
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:53)
... 27 more
2. 观察log，发现所有错误的源头都在Request.getSession，继续追踪可跟踪到插件的RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
3.分辨错误出于插件本身or 项目与插件的兼容
将插件独立部署到纯净的web项目中，环境一致，发现session共享无问题。证明项目与插件不兼容。
flushdb清除缓存后，查看redis keys *,发现在getSession(true)时，生成如下key-value
1) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:attrs" （测试项）
2) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:attrs:test”（测试项）
3) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:expire_at"
4) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:last_access_time"
5) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:timeout"
6) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:creation_time"
7) "sessions
flushdb清除缓存后，运行现项目后，keys * ，发现缓存中只有如下key，
1) "session:B986BE49493FF84E6E2D03329C5B01CB48AE4F4C8470FB6A559952F942BAE074:last_access_time"
2) "session:7B07EB14EF6217D9FE66D509EE94FD6E86EBB9A47DB6DB1F548AFF92B09DF603:last_access_time"(真实sessionId)
此环境与纯净环境相对比，明显少了几种缓存
4.使用redis的monitor命令监控redis服务端接受的命令
发现下面几条类似的缓存确实set过，只不过get时，返回nil，怀疑是缓存过期。且expire_at与Can't getexpireAt from redis.
3) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:expire_at"
5) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:timeout"
6) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:creation_time"
5.反编译tomcat-redis-session-0.8.jar包，查看RedisHttpSession.java:712
相关的代码
RedisHttpSession(String id, RedisManager manager, int
maxInactiveInterval)
{
this.support = new PropertyChangeSupport(this);
this.log.trace("Create session [NEW]. maxInactiveInterval = " + maxInactiveInterval);
this.id = id;
setManager(manager);
this.isNew.set(true);
String sessionsKey = RedisSessionKeys.getSessionsKey();
String creationTimeKey = RedisSessionKeys.getCreationTimeKey(id);
String lastAccessTimeKey = RedisSessionKeys.getLastAccessTimeKey(id);
String expiresAtKey = RedisSessionKeys.getExpireAtKey(id);
String timeoutKey = RedisSessionKeys.getSessionTimeoutKey(id);
long currentTime = System.currentTimeMillis();
long expireAtTime = currentTime + maxInactiveInterval * 1000;
long expireAtTimeWithReserve = currentTime + maxInactiveInterval * 1000 * 2;
Jedis jedis = this.pool.getResource();
try {
Transaction transaction = jedis.multi();
transaction.set(creationTimeKey, Long.toString(currentTime));
transaction.set(lastAccessTimeKey, Long.toString(currentTime));
transaction.set(expiresAtKey, Long.toString(expireAtTimeWithReserve));
transaction.set(timeoutKey, Integer.toString(maxInactiveInterval));
transaction.expireAt(creationTimeKey, getUnixTime(expireAtTimeWithReserve));
transaction.expireAt(lastAccessTimeKey, getUnixTime(expireAtTime));
transaction.expireAt(expiresAtKey, getUnixTime(expireAtTimeWithReserve));
transaction.expireAt(timeoutKey, getUnixTime(expireAtTimeWithReserve));
transaction.zadd(sessionsKey, currentTime, id);
transaction.exec();
this.pool.returnResource(jedis);
} catch (Throwable e) {
this.pool.returnBrokenResource(jedis);
throw new RuntimeException(e);
}
tellNew();
}
猜测蓝色代码部分，可能存在问题。maxInactiveInterval的值？来自哪里？会不会 transaction.expireAt(expiresAtKey,
getUnixTime(expireAtTimeWithReserve));处设置的超时时间有问题？
session有效期多少？在web.xml中有配置：
<session-config>
<session-timeout>604800</session-timeout>（以分为单位）
</session-config>
猜测此处值设置过大，导致currentTime + maxInactiveInterval * 1000;在设置有效期时超界。
将session有效期更改为30分钟
<session-config>
<session-timeout>30</session-timeout>（以分为单位）
</session-config>
发现问题解决。
1.增加jar包丢到CATALINA.HOME/lib
======================================
tomcat-catalina-7.0.57.jar
tomcat-jasper-7.0.57.jar
tomcat-servlet-api-7.0.57.jar
jedis-2.6.2.jar
commons-pool2-2.3.jar
tomcat-redis-session-0.8.jar
======================================
2.配置全局上下文
CATALINA.HOME/conf/context.xml
1) jndi方式 <Manager className="ru.zinin.redis.session.RedisManager" jedisJndiName="custom/jndi/path"/>
2）普通方式 <Manager className="ru.zinin.redis.session.RedisManager" redisHostname="172.16.3.14" redisPort="6379" redisTimeout="10000" />
资料参见：https://github.com/zinin/tomcat-redis-session
1.将插件部署上原项目时，发现调用接口报如下错误
2015-5-1921:16:23 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() forservlet [spring-mvc] in context with path [/heika-mobile] threw exception
java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:909)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:238)
atcom.heika.security.VersionedUsernamePasswordAuthenticationFilter.attemptAuthentication(VersionedUsernamePasswordAuthenticationFilter.java:48)
atorg.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:194)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
atorg.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
atorg.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
atorg.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:184)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:155)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.heika.mobile.servlet.CheckRequiredParametersFilter.doFilter(CheckRequiredParametersFilter.java:63)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.heika.mobile.servlet.PrintParametersFilter.doFilter(PrintParametersFilter.java:49)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
2015-5-1921:16:23 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() forservlet jsp threw exception
java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:229)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:575)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:520)
at org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:147)
at org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:126)
at org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:112)
at org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:65)
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:53)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:488)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:476)
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:345)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:437)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:208)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
2015-5-1921:16:23 org.apache.catalina.core.StandardHostValve custom
严重: Exception ProcessingErrorPage[errorCode=500, location=/err/500.jsp]
org.apache.jasper.JasperException:javax.servlet.ServletException:java.lang.IllegalStateException:
Can't getexpireAt from redis.
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:488)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:476)
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:345)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:437)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:208)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:662)
Caused by:javax.servlet.ServletException:java.lang.IllegalStateException:
Can't getexpireAt from redis.
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:80)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
... 24 more
Caused by:java.lang.IllegalStateException: Can't getexpireAt from redis.
at ru.zinin.redis.session.RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
at ru.zinin.redis.session.RedisHttpSession.renewAll(RedisHttpSession.java:458)
at ru.zinin.redis.session.RedisHttpSession.access(RedisHttpSession.java:508)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3039)
at org.apache.catalina.connector.Request.getSession(Request.java:2384)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:229)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:575)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:520)
at org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:147)
at org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:126)
at org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:112)
at org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:65)
at org.apache.jsp.err._500_jsp._jspService(_500_jsp.java:53)
... 27 more
2. 观察log，发现所有错误的源头都在Request.getSession，继续追踪可跟踪到插件的RedisHttpSession.getExpireAt(RedisHttpSession.java:712)
3.分辨错误出于插件本身or 项目与插件的兼容
将插件独立部署到纯净的web项目中，环境一致，发现session共享无问题。证明项目与插件不兼容。
flushdb清除缓存后，查看redis keys *,发现在getSession(true)时，生成如下key-value
1) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:attrs" （测试项）
2) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:attrs:test”（测试项）
3) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:expire_at"
4) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:last_access_time"
5) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:timeout"
6) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:creation_time"
7) "sessions
flushdb清除缓存后，运行现项目后，keys * ，发现缓存中只有如下key，
1) "session:B986BE49493FF84E6E2D03329C5B01CB48AE4F4C8470FB6A559952F942BAE074:last_access_time"
2) "session:7B07EB14EF6217D9FE66D509EE94FD6E86EBB9A47DB6DB1F548AFF92B09DF603:last_access_time"(真实sessionId)
此环境与纯净环境相对比，明显少了几种缓存
4.使用redis的monitor命令监控redis服务端接受的命令
发现下面几条类似的缓存确实set过，只不过get时，返回nil，怀疑是缓存过期。且expire_at与Can't getexpireAt from redis.
3) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:expire_at"
5) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:timeout"
6) "session:17538B1AC54FCE39DD48B78ACB78800C5B7B71038B769070CEF22768AC0A7933:creation_time"
5.反编译tomcat-redis-session-0.8.jar包，查看RedisHttpSession.java:712
相关的代码
RedisHttpSession(String id, RedisManager manager, int
maxInactiveInterval)
{
this.support = new PropertyChangeSupport(this);
this.log.trace("Create session [NEW]. maxInactiveInterval = " + maxInactiveInterval);
this.id = id;
setManager(manager);
this.isNew.set(true);
String sessionsKey = RedisSessionKeys.getSessionsKey();
String creationTimeKey = RedisSessionKeys.getCreationTimeKey(id);
String lastAccessTimeKey = RedisSessionKeys.getLastAccessTimeKey(id);
String expiresAtKey = RedisSessionKeys.getExpireAtKey(id);
String timeoutKey = RedisSessionKeys.getSessionTimeoutKey(id);
long currentTime = System.currentTimeMillis();
long expireAtTime = currentTime + maxInactiveInterval * 1000;
long expireAtTimeWithReserve = currentTime + maxInactiveInterval * 1000 * 2;
Jedis jedis = this.pool.getResource();
try {
Transaction transaction = jedis.multi();
transaction.set(creationTimeKey, Long.toString(currentTime));
transaction.set(lastAccessTimeKey, Long.toString(currentTime));
transaction.set(expiresAtKey, Long.toString(expireAtTimeWithReserve));
transaction.set(timeoutKey, Integer.toString(maxInactiveInterval));
transaction.expireAt(creationTimeKey, getUnixTime(expireAtTimeWithReserve));
transaction.expireAt(lastAccessTimeKey, getUnixTime(expireAtTime));
transaction.expireAt(expiresAtKey, getUnixTime(expireAtTimeWithReserve));
transaction.expireAt(timeoutKey, getUnixTime(expireAtTimeWithReserve));
transaction.zadd(sessionsKey, currentTime, id);
transaction.exec();
this.pool.returnResource(jedis);
} catch (Throwable e) {
this.pool.returnBrokenResource(jedis);
throw new RuntimeException(e);
}
tellNew();
}
猜测蓝色代码部分，可能存在问题。maxInactiveInterval的值？来自哪里？会不会 transaction.expireAt(expiresAtKey,
getUnixTime(expireAtTimeWithReserve));处设置的超时时间有问题？
session有效期多少？在web.xml中有配置：
<session-config>
<session-timeout>604800</session-timeout>（以分为单位）
</session-config>
猜测此处值设置过大，导致currentTime + maxInactiveInterval * 1000;在设置有效期时超界。
将session有效期更改为30分钟
<session-config>
<session-timeout>30</session-timeout>（以分为单位）
</session-config>
发现问题解决。
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