Hello. > > I have a storage plugin set up for Oracle RDBMS ( using jdbc driver ) and on > one particular schema ( and seems only one ) if I try to run show tables, I > guess NullPointerException ( as shown below ). I tried many other schemas but only one gives this issue. I even tried remotely debugging through the code and it seems RPC get is returning a failure result but again I cannot understand why. Any pointers would be greatly appreciated.
Thank you > > > > > at > org.apache.drill.jdbc.impl.DrillCursor.nextRowInternally(DrillCursor.java:489) > at > org.apache.drill.jdbc.impl.DrillCursor.loadInitialSchema(DrillCursor.java:561) > at > org.apache.drill.jdbc.impl.DrillResultSetImpl.execute(DrillResultSetImpl.java:1895) > at > org.apache.drill.jdbc.impl.DrillResultSetImpl.execute(DrillResultSetImpl.java:61) > at > org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473) > at > org.apache.drill.jdbc.impl.DrillMetaImpl.prepareAndExecute(DrillMetaImpl.java:1100) > at > org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477) > at > org.apache.drill.jdbc.impl.DrillConnectionImpl.prepareAndExecuteInternal(DrillConnectionImpl.java:180) > at > org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109) > at > org.apache.calcite.avatica.AvaticaStatement.execute(AvaticaStatement.java:121) > at > org.apache.drill.jdbc.impl.DrillStatementImpl.execute(DrillStatementImpl.java:101) > at sqlline.Commands.execute(Commands.java:841) > at sqlline.Commands.sql(Commands.java:751) > at sqlline.SqlLine.dispatch(SqlLine.java:746) > at sqlline.SqlLine.begin(SqlLine.java:621) > at sqlline.SqlLine.start(SqlLine.java:375) > at sqlline.SqlLine.main(SqlLine.java:268) > by: org.apache.drill.common.exceptions.UserRemoteException: SYSTEM ERROR: > NullPointerException > > t 0:0 > > at > org.apache.drill.exec.rpc.user.QueryResultHandler.resultArrived(QueryResultHandler.java:123) > at org.apache.drill.exec.rpc.user.UserClient.handle(UserClient.java:343) > at org.apache.drill.exec.rpc.user.UserClient.handle(UserClient.java:88) > at org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:274) > at org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:244) > at > io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89) > at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339) > at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324) > at > io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:254) > at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339) > at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324) > at > io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) > at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339) > at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324) > at > io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242) > at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339) > at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324) > at > io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) > at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339) > at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324) > at > io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847) > at > io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131) > at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) > at > io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111) > at java.lang.Thread.run(Thread.java:745)
