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我正在试验WSO2AM的升级过程，因此我在新机器上部署了版本1.10.0，创建并发布了一个简单的API（一种POST方法），并且然后按照here所述的升级说明进行操作。WSO2AM 2.1.0无法从1.10.0加载API XML
然而，启动时2.1.0（在链接“升级API管理器2.1.0”，步骤4b）在给定的顺序，每次我得到以下错误：
[2017-04-02 16:53:33,051] ERROR - ClassMediatorFactory Error loading class : org.wso2.carbon.apimgt.usage.publisher.APIMgtResponseHandler - Class not found
java.lang.ClassNotFoundException: org.wso2.carbon.apimgt.usage.publisher.APIMgtResponseHandler cannot be found by synapse-core_2.1.7.wso2v10
<long stack trace here, let me know if it's of any value>
[2017-04-02 16:53:33,056] ERROR - ApiDeployer API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
org.apache.synapse.SynapseException: Error loading class : org.wso2.carbon.apimgt.usage.publisher.APIMgtResponseHandler - Class not found
<long stack trace here, let me know if it's of any value>
[2017-04-02 16:53:33,062] ERROR - AbstractSynapseArtifactDeployer Deployment of the Synapse Artifact from file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed!
org.apache.synapse.deployers.SynapseArtifactDeploymentException: API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
<long stack trace here, let me know if it's of any value>
[2017-04-02 16:53:33,067] INFO - AbstractSynapseArtifactDeployer The file has been backed up into : NO_BACKUP_ON_WORKER.INFO
[2017-04-02 16:53:33,067] ERROR - AbstractSynapseArtifactDeployer Deployment of synapse artifact failed. Error reading /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
org.apache.axis2.deployment.DeploymentException: API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
<long stack trace here, let me know if it's of any value>
Caused by: org.apache.synapse.deployers.SynapseArtifactDeploymentException: API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
<long stack trace here, let me know if it's of any value>
[2017-04-02 16:53:33,083] INFO - DeploymentEngine org.apache.axis2.deployment.DeploymentException: API deployment from the file : /home/gabel/wso2am-2.1.0/repository/deployment/server/synapse-configs/default/api/admin--VPP_REST_v1.0.xml : Failed.
当然，当我按照给定顺序执行所有命令并转到发布者时，名为VPP_REST的API不在那里。我错过了什么？
的系统：
- OS：Ubuntu服务器14.04 64位
- JDK：1.8.0_121