Review

When a DataOutputStream instance wraps an underlying ByteArrayOutputStream instance,
it is recommended to flush or close the DataOutputStream before invoking the underlying instances's toByteArray(). Also, it is a good practice to call flush/close explicitly as mentioned for example here.
This pull request add a flush method before toByteArray.

• missing/call

org/apache/gora/accumulo/store/PartitionTest.java

encl(long)

class PartitionTest {
  static long encl(long l) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);
    try {
      dos.writeLong(l);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
    return encoder.decodeLong(baos.toByteArray());
  }

}

class FlushStreamBeforeGetBytes {
  byte[] pattern(long l) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);
    try {
      dos.writeLong(l);
      dos.flush();
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
    return baos.toByteArray();
  }
}