[
https://issues.apache.org/jira/browse/DRILL-5399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15951849#comment-15951849
]
Rahul Challapalli commented on DRILL-5399:
------------------------------------------
One more instance
Query :
{code}
select id, flatten(kvgen(m)) from `json_kvgenflatten/missing-map.json`
{code}
Data:
{code}
{
"id": 1,
"m": {"a":1,"b":2}
}
{
"id": 2
}
{
"id": 3,
"m": {"c":3,"d":4}
}
{code}
Plan :
{code}
00-00 Screen : rowType = RecordType(ANY id, ANY EXPR$1): rowcount = 1.0,
cumulative cost = {2.1 rows, 5.1 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 761
00-01 Project(id=[$0], EXPR$1=[$3]) : rowType = RecordType(ANY id, ANY
EXPR$1): rowcount = 1.0, cumulative cost = {2.0 rows, 5.0 cpu, 0.0 io, 0.0
network, 0.0 memory}, id = 760
00-02 Flatten(flattenField=[$3]) : rowType = RecordType(ANY EXPR$0, ANY
EXPR$1, ANY EXPR$3, ANY EXPR$4): rowcount = 1.0, cumulative cost = {2.0 rows,
5.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 759
00-03 Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$3=[$2], EXPR$4=[$2]) :
rowType = RecordType(ANY EXPR$0, ANY EXPR$1, ANY EXPR$3, ANY EXPR$4): rowcount
= 1.0, cumulative cost = {1.0 rows, 4.0 cpu, 0.0 io, 0.0 network, 0.0 memory},
id = 758
00-04 Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$3=[KVGEN($1)]) :
rowType = RecordType(ANY EXPR$0, ANY EXPR$1, ANY EXPR$3): rowcount = 1.0,
cumulative cost = {1.0 rows, 4.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 757
00-05 Scan(groupscan=[EasyGroupScan
[selectionRoot=maprfs:/drill/testdata/json_kvgenflatten/missing-map.json,
numFiles=1, columns=[`id`, `m`],
files=[maprfs:///drill/testdata/json_kvgenflatten/missing-map.json]]]) :
rowType = RecordType(ANY id, ANY m): rowcount = 1.0, cumulative cost = {0.0
rows, 0.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 756
{code}
And in the logs, I see this warning. Looks like we are failing while setting up
the new schema in the project operator. Could the json reader possibly be
messing it up?
{code}
2017-03-31 15:27:55,863 [27212813-c2fa-204a-2971-015ea610ad67:frag:0:0] WARN
o.a.d.e.e.ExpressionTreeMaterializer - Unable to find value vector of path
`EXPR$3`, returning null instance.
{code}
> Random Error : Flatten does not support inputs of non-list values.
> ------------------------------------------------------------------
>
> Key: DRILL-5399
> URL: https://issues.apache.org/jira/browse/DRILL-5399
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Data Types, Storage - JSON
> Affects Versions: 1.10.0
> Reporter: Rahul Challapalli
>
> git.commit.id.abbrev=38ef562
> 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(sub.fk.`value`) from (select flatten(kvgen(map)) fk from
> `json_kvgenflatten/nested3.json`) sub
> Failed with exception
> java.sql.SQLException: UNSUPPORTED_OPERATION ERROR: Flatten does not support
> inputs of non-list values.
> Fragment 0:0
> [Error Id: 90026283-0b95-4bda-948e-54ed57a62edf on qa-node183.qa.lab:31010]
> 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
> oadd.org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473)
> at
> org.apache.drill.jdbc.impl.DrillMetaImpl.prepareAndExecute(DrillMetaImpl.java:1100)
> at
> oadd.org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
> at
> org.apache.drill.jdbc.impl.DrillConnectionImpl.prepareAndExecuteInternal(DrillConnectionImpl.java:180)
> at
> oadd.org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109)
> at
> oadd.org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:130)
> at
> org.apache.drill.jdbc.impl.DrillStatementImpl.executeQuery(DrillStatementImpl.java:112)
> at
> org.apache.drill.test.framework.DrillTestJdbc.executeQuery(DrillTestJdbc.java:177)
> at
> org.apache.drill.test.framework.DrillTestJdbc.run(DrillTestJdbc.java:101)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: oadd.org.apache.drill.common.exceptions.UserRemoteException:
> UNSUPPORTED_OPERATION ERROR: Flatten does not support inputs of non-list
> values.
> Fragment 0:0
> [Error Id: 90026283-0b95-4bda-948e-54ed57a62edf on qa-node183.qa.lab:31010]
> at
> oadd.org.apache.drill.exec.rpc.user.QueryResultHandler.resultArrived(QueryResultHandler.java:123)
> at
> oadd.org.apache.drill.exec.rpc.user.UserClient.handle(UserClient.java:343)
> at
> oadd.org.apache.drill.exec.rpc.user.UserClient.handle(UserClient.java:88)
> at
> oadd.org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:274)
> at
> oadd.org.apache.drill.exec.rpc.RpcBus$InboundHandler.decode(RpcBus.java:244)
> at
> oadd.io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at
> oadd.io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:254)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at
> oadd.io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at
> oadd.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at
> oadd.io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
> at
> oadd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
> at
> oadd.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
> at
> oadd.io.netty.channel.nio.AbstractNioByteChannel$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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