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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5406) Flatten produces a random ClassCastException
Date Wed, 24 May 2017 17:10:04 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16023246#comment-16023246
] 

Rahul Challapalli commented on DRILL-5406:
------------------------------------------

git.commit.id.abbrev=d11aba2
In the past I was able to reproduce the issue 3 times in 50 runs. Now I couldn't reproduce
the issue with the latest fix in 1000 runs. Automation pending

> Flatten produces a random ClassCastException
> --------------------------------------------
>
>                 Key: DRILL-5406
>                 URL: https://issues.apache.org/jira/browse/DRILL-5406
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - JSON
>    Affects Versions: 1.9.0
>            Reporter: Rahul Challapalli
>
> I hit a random error on drill 1.9.0. I will try to reproduce the issue on the latest
master.
> The below query did not fail when I ran it in isolation. However when I ran the test
suite at [1], which also contains the below query, by using 50 threads submitting queries
concurrently, I hit the below error.
> {code}
> select flatten(convert_from(columns[0], 'JSON')) from `json_kvgenflatten/convert4783_2.tbl`
where 1=2
> [Error Id: 1b5f4aef-ae34-4af4-9f2f-8349f8dd97c2 on qa-node183.qa.lab:31010]
>   (java.lang.ClassCastException) org.apache.drill.common.expression.TypedNullConstant
cannot be cast to org.apache.drill.exec.expr.ValueVectorReadExpression
>     org.apache.drill.exec.physical.impl.flatten.FlattenRecordBatch.setupNewSchema():307
>     org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext():78
>     org.apache.drill.exec.physical.impl.flatten.FlattenRecordBatch.innerNext():120
>     org.apache.drill.exec.record.AbstractRecordBatch.next():162
>     org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next():215
>     org.apache.drill.exec.physical.impl.BaseRootExec.next():104
>     org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext():81
>     org.apache.drill.exec.physical.impl.BaseRootExec.next():94
>     org.apache.drill.exec.work.fragment.FragmentExecutor$1.run():232
>     org.apache.drill.exec.work.fragment.FragmentExecutor$1.run():226
>     java.security.AccessController.doPrivileged():-2
>     javax.security.auth.Subject.doAs():422
>     org.apache.hadoop.security.UserGroupInformation.doAs():1595
>     org.apache.drill.exec.work.fragment.FragmentExecutor.run():226
>     org.apache.drill.common.SelfCleaningRunnable.run():38
>     java.util.concurrent.ThreadPoolExecutor.runWorker():1142
>     java.util.concurrent.ThreadPoolExecutor$Worker.run():617
>     java.lang.Thread.run():745
>         at oadd.org.apache.drill.exec.rpc.user.QueryResultHandler.resultArrived(QueryResultHandler.java:123)
>         at oadd.org.apache.drill.exec.rpc.user.UserClient.handleReponse(UserClient.java:144)
>         at oadd.org.apache.drill.exec.rpc.BasicClientWithConnection.handle(BasicClientWithConnection.java:46)
>         at oadd.org.apache.drill.exec.rpc.BasicClientWithConnection.handle(BasicClientWithConnection.java:31)
>         at oadd.org.apache.drill.exec.rpc.RpcBus.handle(RpcBus.java:65)
>         at oadd.org.apache.drill.exec.rpc.RpcBus$RequestEvent.run(RpcBus.java:363)
>         at oadd.org.apache.drill.common.SerializedExecutor$RunnableProcessor.run(SerializedExecutor.java:89)
>         at oadd.org.apache.drill.exec.rpc.RpcBus$SameExecutor.execute(RpcBus.java:240)
>         at oadd.org.apache.drill.common.SerializedExecutor.execute(SerializedExecutor.java:123)
>         at oadd.org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:274)
>         at oadd.org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:245)
>         at oadd.io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
>         at oadd.io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:254)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
>         at oadd.io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
>         at oadd.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
>         at oadd.io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
>         at oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
>         at oadd.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
>         at oadd.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
>         at oadd.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
>         at oadd.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
>         at oadd.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
>         at oadd.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
>         at oadd.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
>         ... 1 more
> {code}
> [1] https://github.com/mapr/drill-test-framework/tree/master/framework/resources/Functional/json/json_kvgenflatten



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