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An Error Occurred - java.sql.SQLFeatureNotSupportedException

 
Andrei Robert
Greenhorn
Posts: 6
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When i hit the”Sterge” button, it should erase a record and when i hit the ”Modifica” button, if i odifyed something it should save what i modifyed(name, age or average), but it gives me this error.... PLEASE help me :D


An Error Occurred:

java.sql.SQLFeatureNotSupportedException
- Stack Trace

java.sql.SQLFeatureNotSupportedException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:374)
at com.mysql.jdbc.SQLError.notImplemented(SQLError.java:1329)
at com.mysql.jdbc.UpdatableResultSet.rowDeleted(UpdatableResultSet.java:1464)
at javax.faces.model.ResultSetDataModel.setRowIndex(ResultSetDataModel.java:265)
at javax.faces.component.UIData.setRowIndexWithoutRowStatePreserved(UIData.java:485)
at javax.faces.component.UIData.setRowIndex(UIData.java:473)
at javax.faces.component.UIData.broadcast(UIData.java:1096)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:744)
+ Component Tree

+ Scoped Variables




index.html


TabStudenti.java


Student.java
 
Paul Clapham
Sheriff
Posts: 21876
36
Eclipse IDE Firefox Browser MySQL Database
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See this line from the stack trace?

at com.mysql.jdbc.UpdatableResultSet.rowDeleted(UpdatableResultSet.java:1464)


That means you are trying to delete a row from a database table.

And see what the error message is?

java.sql.SQLFeatureNotSupportedException


So the database is telling you that you can't delete the row that way.

What I would suggest is this: take your database-updating code and test it in a small standalone Java application. When you have working code, then you can embed it in JSF. But right now you have a large untested lump of code in a large framework, so you have no idea where to look when something goes wrong. Always test small pieces of code first before putting them into larger untested pieces of code.
 
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