java - 错误 : "Another unnamed CacheManager already exists in the same VM" Using Spring, Jersey 和 ehCache

Question

似乎有另一个进程正在加载缓存，但无法找到它(如果错误没有告诉我谎言)。它唯一告诉我的是，我从一个名为 InputStreamConfigurationSource 的类的某处开始了另一个缓存？？？

有人遇到过这个错误吗？？？

我正在使用

• Spring 3
• Jersey 1.6/1.7
• ehCache 2.6

堆栈跟踪

SEVERE: Servlet.service() for servlet [SpringDispatcher] in context with path [/FileService] threw exception [com.sun.jersey.api.container.ContainerException: Unable to create resource class com.myapp.FileStoreAccessAction] with root cause
net.sf.ehcache.CacheException: Another unnamed CacheManager already exists in the same  VM. Please provide unique names for each CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.
The source of the existing CacheManager is: InputStreamConfigurationSource [stream=java.io.BufferedInputStream@e782a8]
at net.sf.ehcache.CacheManager.assertNoCacheManagerExistsWithSameName(CacheManager.java:521)
at net.sf.ehcache.CacheManager.init(CacheManager.java:371)
at net.sf.ehcache.CacheManager.<init>(CacheManager.java:356)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.sun.jersey.server.spi.component.ResourceComponentConstructor._construct(ResourceComponentConstructor.java:191)
at com.sun.jersey.server.spi.component.ResourceComponentConstructor.construct(ResourceComponentConstructor.java:179)
at com.sun.jersey.server.impl.resource.PerRequestFactory$PerRequest._getInstance(PerRequestFactory.java:182)
at com.sun.jersey.server.impl.resource.PerRequestFactory$AbstractPerRequest.getInstance(PerRequestFactory.java:144)
at com.sun.jersey.server.impl.application.WebApplicationImpl$19$1.getValue(WebApplicationImpl.java:1032)
at com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable$1.getValue(AbstractHttpContextInjectable.java:104)
at com.sun.jersey.server.spi.component.ResourceComponentConstructor._construct(ResourceComponentConstructor.java:196)
at com.sun.jersey.server.spi.component.ResourceComponentConstructor.construct(ResourceComponentConstructor.java:179)
at com.sun.jersey.server.impl.resource.PerRequestFactory$PerRequest._getInstance(PerRequestFactory.java:182)
at com.sun.jersey.server.impl.resource.PerRequestFactory$AbstractPerRequest.getInstance(PerRequestFactory.java:144)
at com.sun.jersey.server.impl.application.WebApplicationImpl$19$1.getValue(WebApplicationImpl.java:1032)
at com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable$1.getValue(AbstractHttpContextInjectable.java:104)
at com.sun.jersey.server.spi.component.ResourceComponentInjector.inject(ResourceComponentInjector.java:222)
at com.sun.jersey.server.spi.component.ResourceComponentConstructor.construct(ResourceComponentConstructor.java:180)
at com.sun.jersey.server.impl.resource.PerRequestFactory$PerRequest._getInstance(PerRequestFactory.java:182)
at com.sun.jersey.server.impl.resource.PerRequestFactory$AbstractPerRequest.getInstance(PerRequestFactory.java:144)
at com.sun.jersey.server.impl.application.WebApplicationContext.getResource(WebApplicationContext.java:238)
at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:83)
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1480)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1411)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1360)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1350)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)

Spring 配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">


<!-- Enable annotation configuration -->
<context:annotation-config/>

<context:component-scan base-package="com.myapp" />

<!-- Jackson JSON ObjectMapper -->
<bean id="objectMapper" class="org.codehaus.jackson.map.ObjectMapper" />

<!-- Cache Manager -->
<bean id="ehCacheManager"
    class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" scope="singleton">
    <property name="configLocation" value="classpath:cacheConfig.xml" />
    <property name="shared" value="true"/>
</bean>

<!-- Data Access -->
<bean id="dataAccessFactory" class="com.myapp.DataAccessFactory" />

<!-- Application Stuff -->
<bean id="fileStoreService" class="com.myapp.FileStoreService" scope="singleton">
    <constructor-arg ref="dataAccessFactory"/>
    <constructor-arg ref="ehCacheManager" />
</bean>

</beans>

网络 xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">

<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:appContext.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<servlet>
    <servlet-name>SpringDispatcher</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>SpringDispatcher</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>

缓存文件

<ehcache>
<cache name="FileStoreList" maxElementsInMemory="10000" eternal="false"
    overflowToDisk="false" timeToIdleSeconds="0" timeToLiveSeconds="0"
    diskPersistent="false" diskExpiryThreadIntervalSeconds="120" />
</ehcache>

文件服务类

public class FileStoreService {

private final CacheManager cacheFactory;

private final DataAccessFactory factory;

public FileStoreService(@InjectParam DataAccessFactory factory, @InjectParam CacheManager ehCacheManager) {
    this.factory = factory;
    cacheFactory = ehCacheManager;
}
...

JSON 端点

public class FileStoreAccessAction {

/**
 * JSON Object Mapper - pasted in via Spring
 */
@InjectParam
private ObjectMapper mapper;

@InjectParam()
private FileStoreService service;

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response list() {

....

Answer 1

关于这个问题“Jersey @InjectParam creating a new Object instead of taking from Spring”，使用了错误的 servlet。因此有两个容器启动，一个通过“ContextLoaderListener”用于 Spring，另一个通过“ServletContainer”用于 Jersey。这意味着正在启动两个缓存实例。

使用的Servlet容器应该是

 <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>

因此 Jersey 可以附加到 Spring 容器