在下面的mule流程中，我实现了带有VMendpoint的REST web服务的Jersey类。

<flow name="APIKeyLoadFlow" doc:name="APIKeyLoadFlow"
        initialState="started">
        <http:inbound-endpoint exchange-pattern="request-response"
            address="${api.load.invoke.url}" doc:name="HTTP"
            responseTimeout="${apikey.http.responsetimeout}" />
        <logger message="Start Of APIKeyLoadFlow -#[payload]" level="INFO"
            doc:name="ENTRY_LOG" />

        <request-reply timeout="300000" >
            <vm:outbound-endpoint connector-ref="VM_Connector"
                exchange-pattern="one-way" path="APIKeyLoadRequest">
            </vm:outbound-endpoint>
            <vm:inbound-endpoint connector-ref="VM_Connector"
                exchange-pattern="one-way" path="APIKeyLoadResponse">
            </vm:inbound-endpoint>
        </request-reply>
        <logger message="End of APIKeyLoadFlow" level="INFO" doc:name="EXIT_LOG" />
        <catch-exception-strategy doc:name="Catch Exception Strategy">
            <logger level="WARN" doc:name="Exception_Log"
                message="Exception in ApiKeyFlow #[System.getProperty('line.separator')] Error Description = #[exception.getMessage()]" />
        </catch-exception-strategy>
    </flow>
    <flow name="ApiKeyLoadRestServiceFlow" doc:name="ApiKeyLoadRestServiceFlow">
        <vm:inbound-endpoint exchange-pattern="one-way"
            path="APIKeyLoadRequest" doc:name="APIKey_Load_Request">
        </vm:inbound-endpoint>
        <logger message="Start of ApiKeyLoadRestServiceFlow -#[payload]" level="INFO"
            doc:name="ENTRY_LOG" />
        <jersey:resources doc:name="REST">
            <component class="com.elexon.bmrs.apikey.service.impl.ApiKeyLoadImpl" />
        </jersey:resources>
        <logger message="End of ApiKeyLoadRestServiceFlow" level="INFO"
            doc:name="EXIT_LOG" />
        <vm:outbound-endpoint exchange-pattern="one-way"
            path="APIKeyLoadResponse" doc:name="APIKey_Load_Response">
        </vm:outbound-endpoint>

但是我在运行请求时遇到了以下异常？请告诉我实施流程中的问题是什么？

信息2015-12-08 13:09:59792[[apikey_load_phase3].connecter.http.mule.default.receptor.02]org.mule.api.prrocessor.LoggerMessage processor:APIKeyLoadFlow的开始-org.apache.commons.httpclient.ContentLengthInputStream@1517f14信息2015-12-08 13:09:59813[[apikey_load_phase3].connecter.http.mule.default.eccepter.02]org.mule.lifecycle.AbstractLifecycleManager:初始化：'VM_Connecter.dispatcher.25489136'。对象为：VMMessageDispatcher信息2015-12-09 13:09:59813[[apikey-load_phase3].connecter.http://mule.default.ecceptr.02]org.mule.lifecycle.AbtractLifecycleNanager:启动：“VM_Connector.dispatcher.25489136”。对象为：VMMessageDispatcher INFO 2015-12-08 13:09:59830[[apikey_load_phase3].ApiKeyLoadRestServiceFlow.sstage1.02]org.mule.api.prrocessor.LoggerMessage processor:ApiKeyLoadRestService Flow的开始-org.apache.commons.httpclient.ContentLengthInputStream@1517f14错误2015-12-08 13:09:59833[[apikey_load_phase3].ApiKeyLoadRestServiceFlow.sstage1.02]org.mule.exception.DefaultMessagingException策略：

消息：未能调用JerseyResourcesComponent｛ApiKeyLoadRestServiceFlow.component.14630019｝。导致异常的组件为：JerseyresourcesComponente｛ApiFeyLoadRestServiceFlow.component.14630019}。消息负载的类型为：ContentLengthInputStream

异常堆栈为:1。null(Java . lang . nullpointerexception)org . mule . module . jersey . jersey resources component:116(null)2。未能调用JerseyResourcesComponent { apikeyloadrestserviceflow . component . 14630019 }。导致异常的组件是:JerseyResourcesComponent { apikeyloadrestserviceflow . component . 14630019 }。消息负载的类型为:contentlength inputstream(org . mule . component . component exception)

根异常堆栈跟踪：org.mule.module.jersy.JerseyResourcesComponent.doInvoke（JerseyresourcesComponend.java:116），org.mule.component.AbstractComponent.invokeInternal（AbstractComponent.java:122），位于org.mule.component.Abstract component.access$000（Abstract component.java:57），还有3个（设置调试级别日志记录或“-Dmule.verbose.exceptions=true”用于所有内容）