Redis中Jedis版本升级后的问题总结

最近因为jedis 2.1.0接口的一些问题，升级版本了版本，结果出现了一个诡异的问题；时常能正常启动，时常出现jedisPool初始化时 java.lang.IllegalArgumentException: hostname can’t be null

原因出在spring JedisPool构造参数上，之前spring的配置如下

<bean id="jedisPool" class="redis.clients.jedis.JedisPool"> 

    <constructor-arg ref="jedisConfig" />

    <constructor-arg value="${redis.host}" />

    <constructor-arg type="int" value="${redis.port}" />

</bean>

明显是因为host没有注入，但时常又可以，诡异！！！之后弄了jedis源码，加了日志，才定位到原因，查看JedisPool源码，其中的两构造函数如下

public JedisPool(final GenericObjectPoolConfig poolConfig, final String host, final int port) {

 this(poolConfig, host, port, Protocol.DEFAULT_TIMEOUT, null, Protocol.DEFAULT_DATABASE, null);

}

 

public JedisPool(final GenericObjectPoolConfig poolConfig, final URI uri, final int timeout) {

 super(poolConfig, new JedisFactory(uri.getHost(), uri.getPort(), timeout, 

   JedisURIHelper.getPassword(uri), JedisURIHelper.getDBIndex(uri) != null ? 

     JedisURIHelper.getDBIndex(uri) : 0, null));

}

我们调用的是第一个构造函数，但事实是可能会调用第二个构造函数；port当做了timeout，host当做了URI。

不是很明白spring为什么会把value是字符串的参数匹配到URI上，那就明确指定类型吧

<bean id="jedisPool" class="redis.clients.jedis.JedisPool"> 

    <constructor-arg ref="jedisConfig" />

    <constructor-arg type="java.lang.String" value="${redis.host}" />

    <constructor-arg type="int" value="${redis.port}" />

</bean>

jedis之前的异常为，方面遇到同问题的同学

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool

        at redis.clients.util.Pool.getResource(Pool.java:50)

        at redis.clients.jedis.JedisPool.getResource(JedisPool.java:88)

        at com.renhenet.modules.redis.RedisService.getHash(RedisService.java:364)

        at com.renhenet.modules.member.MemberRedisService.getMemberIndustryByMemberId(MemberRedisService.java:240)

        at com.renhenet.modules.member.MemberService.getMemberIndustry(MemberService.java:236)

        at com.renhenet.modules.member.MemberService$$FastClassByCGLIB$$b34212a.invoke(<generated>)

        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)

        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)

        at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)

        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)

        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)

        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)

        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)

        at com.renhenet.modules.member.MemberService$$EnhancerByCGLIB$$1638ea72.getMemberIndustry(<generated>)

        at com.renhenet.fw.struts2.interceptor.LoginRenheInterceptor.intercept(LoginRenheInterceptor.java:68)

        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

        at com.renhenet.fw.struts2.interceptor.WebRenheInterceptor.intercept(WebRenheInterceptor.java:27)

        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)

        at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)

        at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:563)

        at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)

        at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)

        at com.renhenet.fw.struts2.filter.RenheStruts2Filter.doFilter(RenheStruts2Filter.java:32)

        at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)

        at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)

        at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)

        at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:436)

        at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)

        at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)

        at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)

        at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.IllegalArgumentException: hostname can't be null

        at java.net.InetSocketAddress.checkHost(InetSocketAddress.java:149)

        at java.net.InetSocketAddress.<init>(InetSocketAddress.java:216)

        at redis.clients.jedis.Connection.connect(Connection.java:142)

        at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:75)

        at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1572)

        at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:69)

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