[BEAM-6604] SpannerIO: unspecified key column value causes NPE

• Type: Bug
• Status: Resolved
• Priority: P3
• Resolution: Fixed
• Affects Version/s: 2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.0, 2.9.0, 2.10.0
• Fix Version/s: 2.11.0
• Component/s: io-java-gcp
• Assignee: Niel Markwick
• Reporter: Niel Markwick
• Created: 06/Feb/19 09:17
• Updated: 16/May/20 13:23
• Resolved: 16/Feb/19 00:51

Description

When creating a Mutation, if a column value is unspecified where the column is a table key would cause an NPE:

Original exception report in 2.5.0
Caused by: java.lang.NullPointerException 
at org.apache.beam.sdk.io.gcp.spanner.MutationGroupEncoder.encodeKey(MutationGroupEncoder.java:489) 
at org.apache.beam.sdk.io.gcp.spanner.SpannerIO$SerializeMutationsFn.processElement(SpannerIO.java:922) 

Link to line of code: 
https://github.com/apache/beam/blob/29bf6b7ef7092dc11385af935a60bfad2db1a531/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/MutationGroupEncoder.java#L489

That code has been moved to MutationKeyEncoder in BEAM 2.9.0