[BEAM-7542] java.lang.ClassCastException when writing BYTES to BigQuery

• Type: Bug
• Status: Resolved
• Priority: P2
• Resolution: Fixed
• Affects Version/s: 2.13.0
• Fix Version/s: 2.14.0
• Component/s: io-java-gcp
• Environment: Running on OS X 10.14.5 (18F132), JRE 1.8.0_152, also in GCP DataFlow
• Assignee: Viktor Gerdin
• Reporter: Viktor Gerdin
• Created: 12/Jun/19 13:52
• Updated: 16/May/20 14:02
• Resolved: 14/Jun/19 14:53

Description

When trying to use BigQueryIO.write() with BigQueryUtils.toTableRow() with a BYTES field it breaks with

java.lang.ClassCastException: [B cannot be cast to java.nio.ByteBuffer at org.apache.beam.sdk.io.gcp.bigquery.BigQueryUtils.fromBeamField(BigQueryUtils.java:280)

BigQueryUtils.fromBeamField() attempts to cast fieldValue to java.nio.ByteBuffer but it is a byte[].

Unit tests are not covering BYTES field type.

Issue Links

• links to: GitHub Pull Request #8858