错误: "同一虚拟机中已经存在另一个未命名的CacheManager" 使用Spring、Jersey和ehCache

Question

错误: "同一虚拟机中已经存在另一个未命名的CacheManager" 使用Spring、Jersey和ehCache

javaspringjerseyehcache

5

似乎有另一个进程正在加载缓存，但找不到它（如果错误没有骗我的话）。它告诉我的唯一一件事是，我从一个名为InputStreamConfigurationSource的类启动了另一个缓存？？？

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

StackTrace

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>

Web 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终端点

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() {

....

- Ben

1个回答

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- Ben · Answer 1

与这个问题 "Jersey @InjectParam creating a new Object instead of taking from Spring" 相关，错误的Servlet被使用了。因此有两个容器启动，一个是通过 "ContextLoaderListener" 启动的Spring容器，另一个是通过 "ServletContainer" 启动的Jersey容器。这意味着会启动两个缓存实例。

应该使用的Servlet容器是：

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

这样 Jersey 就可以附加到 Spring 容器上了