我尝试在Siddhi引擎中使用事件表，通过JDBC Teradata驱动程序连接到Teradata数据库。
Teradata Database在安装了WSO2CEP的同一台计算机上作为虚拟机运行。
首先，我将Teradata JDBC驱动程序terajdbc4.jar放在
中<WSO2CEP_HOME>/repository/components/lib/
目录，并将驱动程序tdgssconfig.jar的其他部分放入
<WSO2CEP_HOME>/bin
目录。然后我重新启动了CEP服务器并使用下一个参数在“数据源”中建立连接：
Datasource type: RDBMS
Name: Teradata
Datasource provider: default
Driver: com.teradata.jdbc.TeraDriver
URL: jdbc:teradata://192.168.96.128/LOG=DEBUG
User name: xxxxx
Password: xxxxx
测试连接正常。
我创建了一个新的执行计划，它将传入的数据流与Teradata db连接起来。
@Export('pcrf_out:1.0.0')
define stream pcrf_out (meta_event string, meta_user_id int, value int);
@Import('pcrf_in_filtered:1.0.0')
define stream pcrf_in_filtered (meta_event string, meta_user_id int, value int);
@From(eventtable='rdbms', datasource.name='Teradata', table.name='user_profile')
define table user_profile (user_id int, usual_traf_usg int);
/* JOIN WITH RELATIONAL TABLE */
from pcrf_in_filtered as a join user_profile as b
on a.meta_user_id == b.user_id and b.usual_traf_usg==100
select a.meta_event as meta_event, a.meta_user_id as meta_user_id, a.value as value
<i>insert into pcrf_out;
当我运行脚本验证时，我看到一条错误消息：Null
Audit.log包含下一条消息：
ERROR {AUDIT_LOG}- Illegal access attempt at [2016-05-04 08:19:38,0813] from IP address null while trying to authenticate access to service EventProcessorAdminService
Wso2carbon.log
TID: [-1234] [] [2016-05-05 13:26:37,361] ERROR {org.wso2.carbon.event.processor.admin.EventProcessorAdminService} - Exception when validating execution plan
org.wso2.carbon.event.processor.core.exception.ExecutionPlanConfigurationException: Error while initialising the connection, null
at org.wso2.carbon.event.processor.core.internal.util.helper.EventProcessorHelper.validateExecutionPlan(EventProcessorHelper.java:193)
at org.wso2.carbon.event.processor.core.internal.CarbonEventProcessorService.validateExecutionPlan(CarbonEventProcessorService.java:493)
at org.wso2.carbon.event.processor.admin.EventProcessorAdminService.validateExecutionPlan(EventProcessorAdminService.java:329)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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.validateExecutionPlan(EventProcessorAdminServiceStub.java:2207)
at org.apache.jsp.eventprocessor.validate_005fsiddhi_005fqueries_005fajaxprocessor_jsp._jspService(validate_005fsiddhi_005fqueries_005fajaxprocessor_jsp.java:73)
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:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$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.validateExecutionPlan(SiddhiManager.java:69)
at org.wso2.siddhi.core.SiddhiManager.validateExecutionPlan(SiddhiManager.java:75)
at org.wso2.carbon.event.processor.core.internal.util.helper.EventProcessorHelper.validateExecutionPlan(EventProcessorHelper.java:191)
... 74 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)
... 82 more
Caused by: java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:246)
... 88 more
相同的执行计划适用于Mysql连接。
有人可以帮我吗？ 谢谢！
答案 0 :(得分：1)
基于上面的堆栈跟踪，类似的异常只有在查询中指定的服务器中没有任何此类数据源时才会发生（See）
您确定定义了以下查询中指定的数据源（同名，大小写也相同）..
@From（eventtable =＆＃39; rdbms＆＃39;，datasource.name =＆＃39; Teradata ＆＃39;，table.name =＆＃39; user_profile＆＃39; ）
回答下一个查询--------
为了使它工作，我们必须为新数据库类型定义db映射（默认情况下，它具有h2，mysql，mssql和oracle的映射）。然后请在db映射文件中添加以下条目。您可以在siddhi-extension-event-table_3.0.5.jar（位于/ repository / components / plugins文件夹中）中找到名为rdbms-table-config.xml的文件。请在该文件中添加以下属性并更新jar文件。在这里，您需要将db元名称添加为映射名称。请参阅here ..
<mapping db='teradata'>
<elements/>
</mapping>