AVRO-XXXX: FastReaderBuilder throws ClassCastException for schemas with java-class attribute #3616
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I'd be happy to try and propose a fix as well but I'm not great at Java |
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…th java-class attribute
When using GenericDatumReader with schemas containing "java-class"
attributes on string fields (e.g., java.math.BigDecimal),
FastReaderBuilder throws:
ClassCastException: Utf8 cannot be cast to String
The bug is in getTransformingStringReader() which casts the result of
stringReader.read() directly to String, but GenericData returns Utf8.
This commit adds a failing test to reproduce the issue.
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AVRO JIRA instance ticket number will be filed as soon as my request to create a JIRA account is granted.
What is the purpose of the change
When using GenericDatumReader with schemas containing "java-class" attributes on string fields (e.g., java.math.BigDecimal), FastReaderBuilder throws:
The bug is in getTransformingStringReader() which casts the result of stringReader.read() directly to String, but GenericData returns Utf8.
This commit adds a failing test to reproduce the issue.
Verifying this change
Run the test suite.
Documentation