[
https://issues.apache.org/jira/browse/DRILL-1834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Arina Ielchiieva resolved DRILL-1834.
-------------------------------------
Resolution: Fixed
> Misleading error message when querying an empty Parquet file
> ------------------------------------------------------------
>
> Key: DRILL-1834
> URL: https://issues.apache.org/jira/browse/DRILL-1834
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Affects Versions: 0.7.0
> Reporter: Aman Sinha
> Priority: Minor
> Fix For: 1.17.0
>
>
> It is possible that a CTAS may fail and create an empty Parquet file. When
> we run a query against this file, we get a misleading error message from the
> planner that hides the original IOException, although the log file does have
> the original exception:
> {code:sql}
> 0: jdbc:drill:zk=local> select count(*) from dfs.`/tmp/empty.parquet`;
> Query failed: Query failed: Unexpected exception during fragment
> initialization: Internal error: Error while applying rule
> DrillPushProjIntoScan, args
> [rel#77:ProjectRel.NONE.ANY([]).[](child=rel#76:Subset#0.ENUMERABLE.ANY([]).[],$f0=0),
> rel#68:EnumerableTableAccessRel.ENUMERABLE.ANY([]).[](table=[dfs,
> /tmp/empty.parquet])]
> {code}
> The cause of the exception is in the logs:
> Caused by: java.io.IOException: Could not read footer:
> java.lang.RuntimeException: file:/tmp/empty.parquet is not a Parquet file
> (too small)
> at
> parquet.hadoop.ParquetFileReader.readAllFootersInParallel(ParquetFileReader.java:195)
> ~[parquet-hadoop-1.5.1-drill-r4.jar:0.7.0-SNAPSHOT]
> at
> parquet.hadoop.ParquetFileReader.readAllFootersInParallel(ParquetFileReader.java:208)
> ~[parquet-hadoop-1.5.1-drill-r4.jar:0.7.0-SNAPSHOT]
> at
> parquet.hadoop.ParquetFileReader.readFooters(ParquetFileReader.java:224)
> ~[parquet-hadoop-1.5.1-drill-r4.jar:0.7.0-SNAPSHOT]
> at
> org.apache.drill.exec.store.parquet.ParquetGroupScan.readFooter(ParquetGroupScan.java:208)
> ~[drill-java-exec-0.7.0-SNAPSHOT-rebuffed.jar:0.7.0-SNAPSHOT]
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
