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https://issues.apache.org/jira/browse/DRILL-4517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15199373#comment-15199373
]
Khurram Faraaz commented on DRILL-4517:
---------------------------------------
This needs to be fixed sooner, that is because we need to use empty parquet
files in Union All tests, to verify that empty input on either side of Union
All operator is handled properly.
> Reading emtpy Parquet file failes with java.lang.IllegalArgumentException
> -------------------------------------------------------------------------
>
> Key: DRILL-4517
> URL: https://issues.apache.org/jira/browse/DRILL-4517
> Project: Apache Drill
> Issue Type: Bug
> Components: Server
> Reporter: Tobias
>
> When querying a Parquet file that has a schema but no rows the Drill Server
> will fail with the below
> This looks similar to DRILL-3557
> {noformat}
> {{ParquetMetaData{FileMetaData{schema: message TRANSACTION_REPORT {
> required int64 MEMBER_ACCOUNT_ID;
> required int64 TIMESTAMP_IN_HOUR;
> optional int64 APPLICATION_ID;
> }
> , metadata: {}}}, blocks: []}
> {noformat}
> {noformat}
> Caused by: java.lang.IllegalArgumentException: MinorFragmentId 0 has no read
> entries assigned
> at
> com.google.common.base.Preconditions.checkArgument(Preconditions.java:92)
> ~[guava-14.0.1.jar:na]
> at
> org.apache.drill.exec.store.parquet.ParquetGroupScan.getSpecificScan(ParquetGroupScan.java:707)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.store.parquet.ParquetGroupScan.getSpecificScan(ParquetGroupScan.java:105)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitGroupScan(Materializer.java:68)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitGroupScan(Materializer.java:35)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.physical.base.AbstractGroupScan.accept(AbstractGroupScan.java:60)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitOp(Materializer.java:102)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitOp(Materializer.java:35)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.physical.base.AbstractPhysicalVisitor.visitProject(AbstractPhysicalVisitor.java:77)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.physical.config.Project.accept(Project.java:51)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitStore(Materializer.java:82)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.Materializer.visitStore(Materializer.java:35)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.physical.base.AbstractPhysicalVisitor.visitScreen(AbstractPhysicalVisitor.java:195)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.physical.config.Screen.accept(Screen.java:97)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.SimpleParallelizer.generateWorkUnit(SimpleParallelizer.java:355)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.planner.fragment.SimpleParallelizer.getFragments(SimpleParallelizer.java:134)
> ~[drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.work.foreman.Foreman.getQueryWorkUnit(Foreman.java:518)
> [drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.work.foreman.Foreman.runPhysicalPlan(Foreman.java:405)
> [drill-java-exec-1.5.0.jar:1.5.0]
> at
> org.apache.drill.exec.work.foreman.Foreman.runSQL(Foreman.java:926)
> [drill-java-exec-1.5.0.jar:1.5.0]
> {noformat}
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