riferrei commented on issue #6669: Using Map's with Avro Generated Types 
Generates Weird Errors
URL: https://github.com/apache/pulsar/issues/6669#issuecomment-611034107
 
 
   I was using 1.9.2 by the time I filed the issue. However, I just tested here 
with both 1.8.2 and 1.9.1 and I still get the same error:
   
   ```
   Caused by: org.apache.pulsar.shade.org.apache.avro.UnresolvedUnionException: 
Not in union 
["null",{"type":"array","items":{"type":"record","name":"PairCharSequenceDouble","namespace":"org.apache.pulsar.shade.org.apache.avro.reflect","fields":[{"name":"key","type":"string"},{"name":"value","type":"double"}]},"java-class":"java.util.Map"}]:
 {-55846986=0.5533789443336609}
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:740)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:205)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:123)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:75)
           at 
org.apache.pulsar.shade.org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:159)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.writeField(GenericDatumWriter.java:166)
           at 
org.apache.pulsar.shade.org.apache.avro.specific.SpecificDatumWriter.writeField(SpecificDatumWriter.java:90)
           at 
org.apache.pulsar.shade.org.apache.avro.reflect.ReflectDatumWriter.writeField(ReflectDatumWriter.java:191)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:156)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:118)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:75)
           at 
org.apache.pulsar.shade.org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:159)
           at 
org.apache.pulsar.shade.org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:62)
           at 
org.apache.pulsar.client.impl.schema.writer.AvroWriter.write(AvroWriter.java:44)
   ```

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