[jira] [Created] (AVRO-2042) Can't reliably write decimal/BigDecimal values to file

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[jira] [Created] (AVRO-2042) Can't reliably write decimal/BigDecimal values to file

JIRA jira@apache.org
Fred Cohen created AVRO-2042:
--------------------------------

             Summary: Can't reliably write decimal/BigDecimal  values to file
                 Key: AVRO-2042
                 URL: https://issues.apache.org/jira/browse/AVRO-2042
             Project: Avro
          Issue Type: Bug
    Affects Versions: 1.8.2
            Reporter: Fred Cohen


Attempting to write some decimal values fails.

Here's the schema I created for this test:

{
  "namespace":"org.test",
  "type": "record",
  "name": "DecimalTest",
  "fields": [

    {
      "name": "decimalVal",
      "type": {"type": "bytes", "logicalType":"decimal","precision": 6, "scale": 4}
       }
  ]
}

The problem is that to my knowledge I can't control the scale used by BigDecimal.
While the first value uses a scale of 4, the second one is scale 0.

        decimals.add(new BigDecimal(12.01F, mathContext));
        decimals.add(new BigDecimal(12.00F, mathContext));

It leads to these errors during the write operation:

org.apache.avro.file.DataFileWriter$AppendWriteException: org.apache.avro.AvroTypeException: Cannot encode decimal with scale 0 as scale 4

        at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:308)
        at AvroDecimalTest.writeDecimalTest(AvroDecimalTest.java:67)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
        at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
        at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
        at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
        at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.avro.AvroTypeException: Cannot encode decimal with scale 0 as scale 4
        at org.apache.avro.Conversions$DecimalConversion.toBytes(Conversions.java:92)
        at org.apache.avro.Conversions$DecimalConversion.toBytes(Conversions.java:62)
        at org.apache.avro.Conversions.convertToRawType(Conversions.java:218)
        at org.apache.avro.generic.GenericDatumWriter.convert(GenericDatumWriter.java:95)
        at org.apache.avro.specific.SpecificDatumWriter.writeField(SpecificDatumWriter.java:84)
        at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:156)
        at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:118)
        at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:75)
        at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:62)
        at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:302)
        ... 23 more




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