SiddhiイベントテーブルがApache stormで正しく動作しない

Question

実行計画でイベントテーブルを使用しようとしましたが、WSO2 CEP v4.1.0の入力ストリームでApache Stormの分散モードでテーブルに参加しようとしました。

私のSiddhiの質問です。

@Plan:name('ExecutionPlan') 

@Import('InputStream:1.0.0') 
define stream InputStream (id string, param1 int, param2 double, param3 string, param4 string, param5 string, param6 string, param7 string); 

@Export('outputStream:1.0.0') 
define stream OutputStream (id string, param3 string); 

@From(eventtable = 'rdbms' , datasource.name = 'MYSQL' , table.name = 'cep') 
define table cepTable (id string, param1 int, param2 double, param3 string, param4 string, param5 string, param6 string, param7 string); 

@name('query1') 
@dist(parallel='2', execGroup='Filtering') 
partition with (id of InputStream) 
begin 
    from InputStream join cepTable 
    on cepTable.id == InputStream.id 
    select InputStream.id as id, InputStream.param3 as param3 
    insert into OutputStream; 
end; 

しかし、それが提供する以下の例外

TID: [-1234] [] [2016-05-13 14:19:11,847] ERROR {org.wso2.carbon.event.processor.admin.EventProcessorAdminService} - Error while initialising the connection, null 
org.wso2.carbon.event.processor.core.exception.ExecutionPlanConfigurationException: Error while initialising the connection, null 
    at org.wso2.carbon.event.processor.core.EventProcessorDeployer.processDeploy(EventProcessorDeployer.java:154) 
    at org.wso2.carbon.event.processor.core.EventProcessorDeployer.executeManualDeployment(EventProcessorDeployer.java:178) 
    at org.wso2.carbon.event.processor.core.internal.util.EventProcessorConfigurationFilesystemInvoker.save(EventProcessorConfigurationFilesystemInvoker.java:95) 
    at org.wso2.carbon.event.processor.core.internal.CarbonEventProcessorService.editInactiveExecutionPlan(CarbonEventProcessorService.java:181) 
    at org.wso2.carbon.event.processor.admin.EventProcessorAdminService.editInactiveExecutionPlan(EventProcessorAdminService.java:108) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212) 
    at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117) 
    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40) 
    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:110) 
    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) 
    at org.apache.axis2.transport.local.LocalTransportReceiver.processMessage(LocalTransportReceiver.java:169) 
    at org.apache.axis2.transport.local.LocalTransportReceiver.processMessage(LocalTransportReceiver.java:82) 
    at org.wso2.carbon.core.transports.local.CarbonLocalTransportSender.finalizeSendWithToAddress(CarbonLocalTransportSender.java:45) 
    at org.apache.axis2.transport.local.LocalTransportSender.invoke(LocalTransportSender.java:77) 
    at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442) 
    at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:430) 
    at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:225) 
    at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149) 
    at org.wso2.carbon.event.processor.stub.EventProcessorAdminServiceStub.editInactiveExecutionPlan(EventProcessorAdminServiceStub.java:2473) 
    at org.apache.jsp.eventprocessor.edit_005fexecution_005fplan_005fajaxprocessor_jsp._jspService(edit_005fexecution_005fplan_005fajaxprocessor_jsp.java:84) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.wso2.carbon.ui.JspServlet.service(JspServlet.java:155) 
    at org.wso2.carbon.ui.TilesJspServlet.service(TilesJspServlet.java:80) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.eclipse.equinox.http.helper.ContextPathServletAdaptor.service(ContextPathServletAdaptor.java:37) 
    at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61) 
    at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128) 
    at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.wso2.carbon.ui.filters.CSRFPreventionFilter.doFilter(CSRFPreventionFilter.java:88) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.wso2.carbon.ui.filters.CRLFPreventionFilter.doFilter(CRLFPreventionFilter.java:59) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.wso2.carbon.tomcat.ext.filter.CharacterSetFilter.doFilter(CharacterSetFilter.java:61) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99) 
    at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47) 
    at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57) 
    at org.wso2.carbon.event.receiver.core.internal.tenantmgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:48) 
    at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47) 
    at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62) 
    at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:159) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1739) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1698) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: org.wso2.siddhi.core.exception.ExecutionPlanRuntimeException: Error while initialising the connection, null 
    at org.wso2.siddhi.extension.eventtable.rdbms.DBHandler.<init>(DBHandler.java:79) 
    at org.wso2.siddhi.extension.eventtable.RDBMSEventTable.init(RDBMSEventTable.java:119) 
    at org.wso2.siddhi.core.util.parser.helper.DefinitionParserHelper.addEventTable(DefinitionParserHelper.java:99) 
    at org.wso2.siddhi.core.util.ExecutionPlanRuntimeBuilder.defineTable(ExecutionPlanRuntimeBuilder.java:74) 
    at org.wso2.siddhi.core.util.parser.ExecutionPlanParser.defineTableDefinitions(ExecutionPlanParser.java:194) 
    at org.wso2.siddhi.core.util.parser.ExecutionPlanParser.parse(ExecutionPlanParser.java:140) 
    at org.wso2.siddhi.core.SiddhiManager.createExecutionPlanRuntime(SiddhiManager.java:53) 
    at org.wso2.siddhi.core.SiddhiManager.createExecutionPlanRuntime(SiddhiManager.java:61) 
    at org.wso2.carbon.event.processor.common.storm.component.SiddhiBolt.init(SiddhiBolt.java:104) 
    at org.wso2.carbon.event.processor.common.storm.component.SiddhiBolt.<init>(SiddhiBolt.java:86) 
    at org.wso2.carbon.event.processor.core.internal.storm.util.StormTopologyConstructor.constructTopologyBuilder(StormTopologyConstructor.java:114) 
    at org.wso2.carbon.event.processor.core.internal.storm.StormTopologyManager.submitTopology(StormTopologyManager.java:127) 
    at org.wso2.carbon.event.processor.core.internal.CarbonEventProcessorService.addExecutionPlan(CarbonEventProcessorService.java:314) 
    at org.wso2.carbon.event.processor.core.EventProcessorDeployer.processDeploy(EventProcessorDeployer.java:124) 
    ... 76 more 
Caused by: java.sql.SQLException 
    at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:254) 
    at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182) 
    at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701) 
    at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635) 
    at org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:188) 
    at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:127) 
    at org.wso2.siddhi.extension.eventtable.rdbms.DBHandler.<init>(DBHandler.java:73) 
    ... 89 more 
Caused by: java.lang.NullPointerException 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:278) 
    at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:246) 
    ... 95 more 

その理由は何ですか

？

Answer 1

、

@From(eventtable = 'rdbms' , datasource.name = 'MYSQL' , table.name = 'cep') 

我々は間'MYSQL'と呼ばれるデータソースを定義していることを考えるとWSO2CEPサーバーのデータソース構成。

ただし、ExemptプランがStormにデプロイされている場合は、データソース設定をインラインで指定する必要があります（WSO2CEPサーバーで定義されているデータソース設定がStormでは使用できないためです）。 これは以下のように行うことができる。

@From(eventtable = 'rdbms' , jdbc.url='', username='', password='', driver.name='' , table.name = 'cep') 

適切注釈要素に記入。

これで問題が解決されることを願います。

Answer 2

1）MySQL接続を設定しているかどうかを確認してください。以下のリンクをチェックしてMySQL接続を設定してください： https://docs.wso2.com/display/CEP410/Setting+up+MySQL

チェックサーバが到達可能で、スキーマが必要なテーブル（cep）を持つサーバで利用可能です。スキーマ名 "MYSQL"は正しいですか？チェックしてください。

2）event-processor.xmlファイルのストームクラスタリングの設定を確認してください。リンクの下の設定チェックの詳細については： 実行計画は、次の注釈を持つことが十分だろう、WSO2CEPサーバーにデプロイされhttps://docs.wso2.com/display/CLUSTER44x/Clustering+CEP+4.1.0#ClusteringCEP4.1.0-DistributedmodedeploymentDistributedCEP