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我试图集成 APIM 1.10.0 和 DAS 3.0.1。我正在运行一个 docker-compose，每个 APIM 产品配置文件都有一个 docker 容器。我按照文档中概述的步骤配置 APIM 和 DAS。我确保在 APIM 和 DAS 中都配置了 stat_db 连接。我在 DAS 日志中看到以下异常。有人可以让我知道可能是什么问题吗？

ERROR {org.wso2.carbon.ntask.core.impl.TaskQuartzJobAdapter} -  Error in executing task: Analytics Relation created with an empty schema for tableORG_WSO2_APIMGT_STATISTICS_THROTTLE   

ERROR {org.wso2.carbon.ntask.core.impl.TaskQuartzJobAdapter} -  Error in executing task: Analytics Relation created with an empty schema for tableORG_WSO2_APIMGT_STATISTICS_REQUEST

此外，APIM 似乎一开始就无法发布该事件。以下是 APIM 日志中的异常，这里是完整的堆栈跟踪

java.lang.NullPointerException
        at org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageDataBridgeDataPublisher.publishEvent(APIMgtUsageDataBridgeDataPublisher.java:124)
        at org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageHandler.handleRequest(APIMgtUsageHandler.java:169)
        at org.apache.synapse.rest.API.process(API.java:322)
        at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:86)
        at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:65)
        at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:295)
        at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:83)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
        at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:317)
        at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:149)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
[2016-08-15 03:48:10,520] ERROR - APIMgtResponseHandler Cannot publish response event. null
java.lang.NullPointerException
        at org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageDataBridgeDataPublisher.publishEvent(APIMgtUsageDataBridgeDataPublisher.java:140)
        at org.wso2.carbon.apimgt.usage.publisher.APIMgtResponseHandler.mediate(APIMgtResponseHandler.java:211)
        at org.apache.synapse.mediators.ext.ClassMediator.mediate(ClassMediator.java:84)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:81)
        at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:48)
        at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:155)
        at org.apache.synapse.rest.Resource.process(Resource.java:297)
        at org.apache.synapse.rest.API.process(API.java:335)
        at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:86)
        at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:52)
        at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:295)
        at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:529)
        at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:172)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
        at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:251)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
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