Tao Li created BEAM-11721:
-----------------------------
Summary: Cannot read array values with ParquetIO
Key: BEAM-11721
URL: https://issues.apache.org/jira/browse/BEAM-11721
Project: Beam
Issue Type: Bug
Components: io-java-parquet
Affects Versions: 2.25.0
Reporter: Tao Li
Attachments: beam-test-schema.avsc, beam-test.snappy.parquet
Hi Beam community,
I am seeing an error when reading an array field using ParquetIO. I was using
beam 2.25. Both direct runner and spark runner testing is seeing this issue.
This is a blocker issue to me for the beam adoption, so a prompt help would be
appreciated.
Below is the schema tree as a quick visualization. The array field name is
"list" and the element type is int.
root
|-- list: array (nullable = true)
| |-- element: integer (containsNull = true)
The beam code is very simple:
pipeline.apply(ParquetIO.read(avroSchema).from(parquetPath));
Here is the error when running that code:
{noformat}
Exception in thread "main"
org.apache.beam.sdk.Pipeline$PipelineExecutionException:
java.lang.ClassCastException: org.apache.avro.generic.GenericData$Record cannot
be cast to java.lang.Number
at
org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:353)
at
org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:321)
at
org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:216)
at
org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:67)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:317)
at org.apache.beam.sdk.Pipeline.run(Pipeline.java:303)
Caused by: java.lang.ClassCastException:
org.apache.avro.generic.GenericData$Record cannot be cast to java.lang.Number
at
org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:156)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82)
at
org.apache.avro.generic.GenericDatumWriter.writeArray(GenericDatumWriter.java:234)
at
org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:136)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82)
at
org.apache.avro.generic.GenericDatumWriter.writeField(GenericDatumWriter.java:206)
at
org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:195)
at
org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:130)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:72)
at
org.apache.beam.sdk.coders.AvroCoder.encode(AvroCoder.java:317)
at org.apache.beam.sdk.coders.Coder.encode(Coder.java:136)
at
org.apache.beam.sdk.util.CoderUtils.encodeToSafeStream(CoderUtils.java:82)
at
org.apache.beam.sdk.util.CoderUtils.encodeToByteArray(CoderUtils.java:66)
at
org.apache.beam.sdk.util.CoderUtils.encodeToByteArray(CoderUtils.java:51)
at
org.apache.beam.sdk.util.CoderUtils.clone(CoderUtils.java:141)
at
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector.<init>(MutationDetectors.java:115)
at
org.apache.beam.sdk.util.MutationDetectors.forValueWithCoder(MutationDetectors.java:46)
at
org.apache.beam.runners.direct.ImmutabilityCheckingBundleFactory$ImmutabilityEnforcingBundle.add(ImmutabilityCheckingBundleFactory.java:112)
at
org.apache.beam.runners.direct.ParDoEvaluator$BundleOutputManager.output(ParDoEvaluator.java:301)
at
org.apache.beam.repackaged.direct_java.runners.core.SimpleDoFnRunner.outputWindowedValue(SimpleDoFnRunner.java:267)
at
org.apache.beam.repackaged.direct_java.runners.core.SimpleDoFnRunner.access$900(SimpleDoFnRunner.java:79)
at
org.apache.beam.repackaged.direct_java.runners.core.SimpleDoFnRunner$DoFnProcessContext.output(SimpleDoFnRunner.java:413)
at
org.apache.beam.repackaged.direct_java.runners.core.SimpleDoFnRunner$DoFnProcessContext.output(SimpleDoFnRunner.java:401)
at
org.apache.beam.sdk.io.parquet.ParquetIO$ReadFiles$ReadFn.processElement(ParquetIO.java:646)
{noformat}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
