Benjamin BENOIST created BEAM-3766:
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Summary: BigQueryIO - Must specify numFileShards when using
FILE_LOADS with unbounded PCollection
Key: BEAM-3766
URL: https://issues.apache.org/jira/browse/BEAM-3766
Project: Beam
Issue Type: Bug
Components: io-java-gcp
Affects Versions: 2.3.0
Reporter: Benjamin BENOIST
Assignee: Chamikara Jayalath
Since Beam v2.2 it's possible to use
[FILE_LOADS|https://beam.apache.org/documentation/sdks/javadoc/2.2.0/org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.Write.Method.html#FILE_LOADS].
The documentation states that we have to specify _withTriggeringFrequency_
when using it, but doesn't talk about _withNumFileShards_, whereas if we don't
specify it we get the below exception:
{code:java}
Exception in thread "main" java.lang.IllegalArgumentException
at
com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
at
org.apache.beam.sdk.io.gcp.bigquery.BatchLoads.expandTriggered(BatchLoads.java:209)
at
org.apache.beam.sdk.io.gcp.bigquery.BatchLoads.expand(BatchLoads.java:546)
at
org.apache.beam.sdk.io.gcp.bigquery.BatchLoads.expand(BatchLoads.java:79)
at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:537)
at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:472)
at org.apache.beam.sdk.values.PCollection.apply(PCollection.java:286)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO$Write.expandTyped(BigQueryIO.java:1550)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO$Write.expand(BigQueryIO.java:1497)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO$Write.expand(BigQueryIO.java:980)
at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:537)
at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:491)
at org.apache.beam.sdk.values.PCollection.apply(PCollection.java:299)
at com.travelaudience.data.job.rtbtobigquery.Main$.main(Main.scala:74)
at com.travelaudience.data.job.rtbtobigquery.Main.main(Main.scala)
{code}
Either default _numFileShards_ should be used or it should be precised in the
documentation that this has to be set.
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