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https://issues.apache.org/jira/browse/AVRO-2028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17431086#comment-17431086
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Martin Sillence commented on AVRO-2028:
---------------------------------------
It sounds very much like it but the 1.11.0-SNAPSHOT didn't work for me - nor
does running against a local build of 1.12.0-SNAPSHOT checked out today
> Specific Data, newBuilder(existingInstance) fails for BigDecimal
> ----------------------------------------------------------------
>
> Key: AVRO-2028
> URL: https://issues.apache.org/jira/browse/AVRO-2028
> Project: Apache Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.8.2
> Reporter: Adrian McCague
> Priority: Major
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Using 1.8.2-rc3
> When attempting to use:
> {{MyType.newBuilder(existingType)}}
> With a field of type {{Union}}:
> {code}
> ["null",{"type":"bytes","logicalType":"decimal","precision":20,"scale":8}]
> {code}
> I get the following exception:
> {code}
> org.apache.avro.UnresolvedUnionException: Not in union
> ["null",{"type":"bytes","logicalType":"decimal","precision":20,"scale":8}]:
> 12000.00000000
> at
> org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:740)
> at
> org.apache.avro.generic.GenericData.deepCopyRaw(GenericData.java:1146)
> at org.apache.avro.generic.GenericData.deepCopy(GenericData.java:1062)
> at MyType$Builder.<init>
> {code}
> I suspected it may be related but also noticed in the generated Specific Data
> class the following:
> {code}
> private static final org.apache.avro.Conversion<?>[] conversions =
> new org.apache.avro.Conversion<?>[] {
> null,
> TIMESTAMP_CONVERSION,
> null,
> null, // Should be DECIMAL_CONVERSION
> null,
> null,
> null,
> null,
> null
> };
> {code}
> ie, the conversion was missing.
> Adding this by hand however did not resolve the issue. I will add this as
> another issue.
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