On premises oracle database access issue with database connector, any suggestions please??

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Hi Guys, I am trying to access onprem Oracle database using Database connector but no luck , need suggestions. I gave below details to execute query  call URL : 'jdbc:oracle:thin:@XXXXXXXXXXXX:1526/<SID>' User name : xxxxxxxxxxxxx password : xxxxxxxxx   Select  query : select a , b from xyz when running I am getting below error   com.mendix.webui.WebUIException: Exception while retrieving data for list widget XXXXXXXXX on page xxxxxxxxxxxxxxxx  at com.mendix.webui.actions.client.RetrieveByMicroflowAction.$anonfun$apply$2(RetrieveByMicroflowAction.scala:59) Caused by: com.mendix.core.CoreException: com.mendix.modules.microflowengine.MicroflowException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException  at xxxxxxxxxxxxxxxxx (JavaAction : 'Execute query') Advanced stacktrace:  at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:354) Caused by: com.mendix.modules.microflowengine.MicroflowException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException  at xxxxxxxxxxxxxxx (JavaAction : 'Execute query') Advanced stacktrace:  at com.mendix.modules.microflowengine.MicroflowUtil.processException(MicroflowUtil.java:146) Caused by: com.mendix.core.CoreException: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException  at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:383) Caused by: com.mendix.core.CoreRuntimeException: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException  at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:155) Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.NullPointerException  at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:36) Caused by: java.lang.NullPointerException: null  at databaseconnector.impl.JdbcConnector.lambda$executeQuery$1(JdbcConnector.java:51)  at java.base/java.util.HashMap.forEach(HashMap.java:1336)  at databaseconnector.impl.JdbcConnector.lambda$executeQuery$2(JdbcConnector.java:66)  at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)  at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)  at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)  at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)  at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)  at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)  at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)  at databaseconnector.actions.ExecuteQuery.executeAction(ExecuteQuery.java:83)  at databaseconnector.actions.ExecuteQuery.executeAction(ExecuteQuery.java:58)  at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:46)  at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)  at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:49)  at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:54)  at com.mendix.basis.actionmanagement.ActionManagerBase$1.execute(ActionManagerBase.java:146)  at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)  at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:151)  at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:379)  at com.mendix.modules.microflowengine.actions.actioncall.JavaAction.execute(JavaAction.scala:53)  at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47)  at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:201)  at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:157)  at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:46)  at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)  at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:49)  at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:54)  at com.mendix.basis.actionmanagement.ActionManagerBase$1.execute(ActionManagerBase.java:146)  at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)  at com.mendix.basis.actionmanagement.ActionManagerBase.executeSync(ActionManagerBase.java:151)  at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:348)  at com.mendix.basis.component.InternalCoreBase.execute(InternalCoreBase.java:363)  at com.mendix.webui.actions.client.RetrieveByMicroflowAction.$anonfun$apply$2(RetrieveByMicroflowAction.scala:40)  at scala.util.Either.map(Either.scala:353)  at com.mendix.webui.actions.client.RetrieveByMicroflowAction.apply(RetrieveByMicroflowAction.scala:28)  at com.mendix.webui.actions.client.RetrieveByMicroflowAction.apply(RetrieveByMicroflowAction.scala:16)  at com.mendix.webui.actions.client.RegularClientAction$.$anonfun$stateless$1(RegularClientAction.scala:27)  at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$7(RegularClientAction.scala:63)  at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:37)  at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:30)  at com.mendix.webui.actions.client.RegularClientAction.withState(RegularClientAction.scala:30)  at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$3(RegularClientAction.scala:61)  at scala.util.Try$.apply(Try.scala:213)  at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:54)  at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:53)  at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$3(ContextHandling.scala:41)  at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)  at com.mendix.basis.actionmanagement.IMonitoredAction$$anon$1.execute(IMonitoredAction.scala:47)  at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)  at com.mendix.basis.actionmanagement.IMonitoredAction.monitor(IMonitoredAction.scala:49)  at com.mendix.basis.actionmanagement.IMonitoredAction.monitor$(IMonitoredAction.scala:25)  at com.mendix.webui.requesthandling.helpers.ContextHandling$ClientMonitoredAction.monitor(ContextHandling.scala:49)  at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:41)  at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:27)  at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:30)  at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:24)  at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:19)  at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:30)  at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:53)  at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)  at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest(ProfileHandling.scala:14)  at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest$(ProfileHandling.scala:10)  at com.mendix.webui.actions.client.RegularClientAction.profileRequest(RegularClientAction.scala:30)  at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:50)  at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:130)  at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:107)  at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:40)  at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:76)  at com.mendix.external.connector.MxRuntimeConnector$1.execute(MxRuntimeConnector.java:73)  at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32)  at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.java:79)  at com.mendix.basis.impl.MxRuntimeImpl.processRequest(MxRuntimeImpl.java:967)  at com.mendix.m2ee.appcontainer.server.handler.RuntimeHandler.service(RuntimeHandler.java:42)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)  at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)  at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)  at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)  at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)  at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)  at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)  at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)  at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)  at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)  at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)  at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)  at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)  at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)  at org.eclipse.jetty.server.Server.handle(Server.java:502)  at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)  at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)  at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)  at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)  at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)  at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)  at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)  at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)  at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)  at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)  at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)  at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)  at java.base/java.lang.Thread.run(Thread.java:834)    
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1 answers
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The error indicates that Mendix is unable to parse the SQL response from the database server.

Are you using an Oracle version supported by Mendix?

Oracle Database 11g Release 2, 12c Release 1
https://www.mendix.com/evaluation-guide/app-capabilities/data-storage#database-support

Otherwise, i would check the database logs for any errors and submit a support ticket to Mendix.

answered