Question

我尝试使用memcached-session-manager版本1.6.3实现非粘性Tomcat会话共享。在我的桌面开发环境中，我想使用de.javakaffee.web.msm.DummyMemcachedBackupSessionManager作为经理类，因为我没有在开发中设置memcached机队。

我遇到的问题是，DummyMemcachedBackupSessionManager似乎粗略地实施，因为它每次尝试加载会话时都会导致NullPointerException。我的日志中填充了像这样的堆栈跟踪：

May 06, 2015 5:24:59 PM de.javakaffee.web.msm.MemcachedSessionService loadFromMemcached
WARNING: Could not load session with id 0D66BAE28A0B302425186CD6B3F62DAA-n1 from memcached.
java.lang.NullPointerException
        at de.javakaffee.web.msm.MemcachedSessionService.loadFromMemcached(MemcachedSessionService.java:1111)
        at de.javakaffee.web.msm.MemcachedSessionService.findSession(MemcachedSessionService.java:597)
        at de.javakaffee.web.msm.DummyMemcachedSessionService.findSession(DummyMemcachedSessionService.java:113)
        at de.javakaffee.web.msm.MemcachedBackupSessionManager.findSession(MemcachedBackupSessionManager.java:196)
        at org.apache.catalina.connector.Request.doGetSession(Request.java:2981)
        at org.apache.catalina.connector.Request.getSession(Request.java:2378)
        at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:897)
        at com.amazon.sentry.TomcatSSOFilter.setSessionAttributes(TomcatSSOFilter.java:133)
...

我是否可以使用1.6.3版本来避免使用所有这些NPE污染我的日志？

作为参考，我的context.xml看起来像这样：

<?xml version="1.0">
<Context>
    <Manager className="de.javakaffee.web.msm.DummyMemcachedBackupSessionManager"
             sticky="false"
             lockingMode="none"
             sessionBackupAsync="false"
             memcachedNodes="n1:dummy-node:0"
             requestUriIgnorePattern="\.(ico|png|gif|jpg|css|js)$"
    />
</Context>

DummyMemcachedBackupSessionManager不断抛出NullPointerException

0 个答案: