Avro write and read works on one machine and not on other

问题

Here is some Avro code that runs on one machine but fails on the other with an exception.

We are not able to make sure what's wrong here.

Here is the code that is causing the problem.

Class<?> clazz = obj.getClass();
ReflectData rdata = ReflectData.AllowNull.get();
Schema schema = rdata.getSchema(clazz);

ByteArrayOutputStream os = new ByteArrayOutputStream();
Encoder encoder = EncoderFactory.get().binaryEncoder(os, null);
DatumWriter<T> writer = new ReflectDatumWriter<T>(schema, rdata);
writer.write(obj, encoder);
encoder.flush();
byte[] bytes = os.toByteArray();

String binaryString = new String (bytes, "ISO-8859-1");
BinaryDecoder decoder = DecoderFactory.get().binaryDecoder(binaryString.getBytes("ISO-8859-1"), null);
GenericDatumReader<GenericRecord> datumReader = new GenericDatumReader<GenericRecord> (schema);
GenericRecord record = datumReader.read(null, decoder);

Exception is:

org.apache.avro.AvroRuntimeException: Malformed data. Length is negative: -32
at org.apache.avro.io.BinaryDecoder.doReadBytes(BinaryDecoder.java:336)
at org.apache.avro.io.BinaryDecoder.readString(BinaryDecoder.java:263)
at org.apache.avro.io.ValidatingDecoder.readString(ValidatingDecoder.java:107)
at org.apache.avro.generic.GenericDatumReader.readString(GenericDatumReader.java:437)
at org.apache.avro.generic.GenericDatumReader.readString(GenericDatumReader.java:427)
at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:189)
at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:187)
at org.apache.avro.generic.GenericDatumReader.readField(GenericDatumReader.java:263)
at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:216)
at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:183)
at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:173)

回答1:

Adding Dfile.encoding=UTF-8 in the tomcat params helped us resolve the issue.

来源：https://stackoverflow.com/questions/30198156/avro-write-and-read-works-on-one-machine-and-not-on-other