使用Ehcache弹出@Cacheable，spel为有效对象找到null [英] spring @Cacheable with Ehcache, spel find null for valid object

问题描述

我有一个类似的问题但有时它有效。描述的错误只会偶尔发生一次。

I have a similar problem which but sometimes it works. The error described only happens once in a while.

我使用的是spring 3.2.5和ehcache 2.6.5。

I am using spring 3.2.5 and ehcache 2.6.5.

异常跟踪：

org.springframework.expression.spel.SpelEvaluationException: EL1007E:(pos 0): Field or property 'applicationID' cannot be found on null
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:213)
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:85)
        at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:43)
        at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:346)
        at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:82)
        at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:93)
        at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:89)
        at org.springframework.cache.interceptor.ExpressionEvaluator.key(ExpressionEvaluator.java:95)
        at org.springframework.cache.interceptor.CacheAspectSupport$CacheOperationContext.generateKey(CacheAspectSupport.java:452)
        at org.springframework.cache.interceptor.CacheAspectSupport.inspectCacheables(CacheAspectSupport.java:281)
        at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:199)
        at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:66)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at com.sun.proxy.$Proxy85.getMailOrigin(Unknown Source)
        at com.myApplication.MailFilterServiceImpl.isValid(ApplicationServiceImpl.java:134)

我的缓存代码如下：

MailFilterServiceImpl
    @Cacheable(value="mailClientsCache", key="#mb.applicationID")
        public MailClientBean getMailOrigin(MailBean mb){}

发生这种情况时：
当我将jenkins配置为构建并自动部署到tomcat7 /当我使用maven构建eclipse WS并部署到tomcat7时。

When this happens: When I have a jenkins configured to build and autodeploy to tomcat7 / when I use maven to build in the eclipse WS and deploy to tomcat7.

当这完全有效时：
一旦失败一次，如果我编辑MailFilterServiceImpl.java只需要一些空格来重新编译eclipse并重新启动tomcat7服务器。

When this works perfectly: After it has failed once, if I edit the MailFilterServiceImpl.java simply with some spaces to make it recompile in eclipse and restart the tomcat7 server.

我需要让它在CI场景中运行。

I need to make it work in a CI scenario.

[更新]
设置编译器选项debug：true可解决此问题。优化似乎没有任何发言权。

[Update] Setting compiler option debug:true works around this problem. The optimized doesnt seem to have any say.

<debug>true</debug>
<optimize>true</optimize>

推荐答案

你的描述清楚地表明：它不起作用当您使用 javac 进行编译时，它确实可以与Eclipse编译器 ecj 一起使用。您可能正在编译而没有调试信息。

Your description makes one thing clear: It does not work when you compile with javac, but it does work with the Eclipse compiler ecj. You might be compiling without debugging information.

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