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https://issues.apache.org/jira/browse/BEAM-12581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17478834#comment-17478834
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Beam JIRA Bot commented on BEAM-12581:
--------------------------------------
This issue is P2 but has been unassigned without any comment for 60 days so it
has been labeled "stale-P2". If this issue is still affecting you, we care!
Please comment and remove the label. Otherwise, in 14 days the issue will be
moved to P3.
Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed
explanation of what these priorities mean.
> Row.toString() method is throwing NullPointerException while processing a
> nullable map
> --------------------------------------------------------------------------------------
>
> Key: BEAM-12581
> URL: https://issues.apache.org/jira/browse/BEAM-12581
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.30.0
> Reporter: Luis Muñoz
> Priority: P2
> Labels: stale-P2
>
> When a row object has a beam schema containing fields of type MAP which
> values are null, it will throw a NullPointerException while trying to call
> Row.toString() method.
> This could happen, for example, when you convert an AVRO record (which has
> unions of null and map types) to Row object and then call toString() method.
> *Test showing the issue*:
>
>
> {code:java}
> @Test(expected = NullPointerException.class)
> public void
> givenANullableMap_whileRowToString_thenThrowNullPointerException() {
> Schema mapSchema = map().values().stringType();
> Schema nullableMapUnion =
> SchemaBuilder.unionOf().nullType().and().type(mapSchema).endUnion();
> Schema recordSchema =
> SchemaBuilder.record("TestRecord").fields().name("union")
> .type(nullableMapUnion).withDefault(null).endRecord();
> GenericRecord genericRecord = new GenericRecordBuilder(recordSchema).build();
> Row rowRecord = AvroUtils.toBeamRowStrict(genericRecord,
> AvroUtils.toBeamSchema(recordSchema));
> String rowAsString = rowRecord.toString();
> }
> {code}
> This behaviour doesn't happen with the previous implementation of the
> Row.toString() method from version 2.29.0.
> Additionally when you have a non null value for the map attribute, the row
> representation as string in version 2.30.0 is as follow:
> {code:java}
> Row: union:{(testing, value), }
> {code}
> Which has an extra comma despite the fact it is only one element in the map.
>
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