原文鏈接：http://blog.csdn.net/rchm8519/article/details/48347797

redis.clients.util.Pool.getResource(Pool.Java:50)
redis.clients.jedis.JedisPool.getResource(JedisPool.java:88)
com.radiadesign.catalina.session.RedisSessionManager.acquireConnection(RedisSessionManager.java:107)
com.radiadesign.catalina.session.RedisSessionManager.loadSessionFromRedis(RedisSessionManager.java:388)
com.radiadesign.catalina.session.RedisSessionManager.findSession(RedisSessionManager.java:330)
org.apache.catalina.connector.Request.doGetSession(Request.java:2981)
org.apache.catalina.connector.Request.getSessionInternal(Request.java:2599)
com.radiadesign.catalina.session.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:28)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
org.apache.tomcat.util.NET.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1739)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1698)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
root cause

redis.clients.jedis.exceptions.JedisDataException: ERR Client sent AUTH, but no password is set
redis.clients.jedis.Protocol.processError(Protocol.java:113)
redis.clients.jedis.Protocol.process(Protocol.java:138)
redis.clients.jedis.Protocol.read(Protocol.java:192)
redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:282)
redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:181)
redis.clients.jedis.BinaryJedis.auth(BinaryJedis.java:1930)
redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:71)
org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:819)
org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:429)
org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:360)
redis.clients.util.Pool.getResource(Pool.java:48)
redis.clients.jedis.JedisPool.getResource(JedisPool.java:88)
com.radiadesign.catalina.session.RedisSessionManager.acquireConnection(RedisSessionManager.java:107)
com.radiadesign.catalina.session.RedisSessionManager.loadSessionFromRedis(RedisSessionManager.java:388)
com.radiadesign.catalina.session.RedisSessionManager.findSession(RedisSessionManager.java:330)
org.apache.catalina.connector.Request.doGetSession(Request.java:2981)
org.apache.catalina.connector.Request.getSessionInternal(Request.java:2599)
com.radiadesign.catalina.session.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:28)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
org.apache.tomcat.util.Net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1739)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1698)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)

問題原因看起來很清楚，就是這句： ERR Client sent AUTH, but no password is set

它的意思就是redis服務器沒有設置密碼，但客戶端向其發送了AUTH請求，於是把程序中所有jedis發送授權的地方都去掉，可是發現異常還是存在！！簡直無語了

最後想起在tomcat中還有同步session到redis的配置，這裏還設置了password，而且即使是空“”也不行。把整個password幹掉，重啟，ok啦！

<Valve className="com.radiadesign.catalina.session.RedisSessionHandlerValve" />
<Manager className="com.radiadesign.catalina.session.RedisSessionManager"
host="172.11.22.33" password="" port="6379" database="5" maxInactiveInterval="60" />

另外：關於redis的啟動方式：

1、指定配置文件 $: ./redis-server /usr/local/redis.conf

2、不指定配置：$: ./redis-server &

不指定配置文件啟動時采用默認配置，無密碼

redis通過屬性requirepass 設置訪問密碼，但沒有設置該屬性時，客戶端向服務端發送AUTH請求，服務端就好返回異常：ERR Client sent AUTH, but no password is set

Redis錯誤：jedis.exceptions.JedisDataException: ERR Client sent AUTH, but no password is set