Exception while decoding UTF-8 encoded stream

Question

java.io.UTFDataFormatException
java.io.ObjectInputStream$BlockDataInputStream.readUTFSpan(ObjectInputStream.java(Compiled Code))
java.io.ObjectInputStream$BlockDataInputStream.readUTFBody(ObjectInputStream.java(Compiled Code))
java.io.ObjectInputStream$BlockDataInputStream.readUTF(ObjectInputStream.java:2737)
java.io.ObjectInputStream.readUTF(ObjectInputStream.java:1029)
java.io.ObjectStreamClass.readNonProxy(ObjectStreamClass.java:606)
can anybody tell what is possible reasons for getting such exception while decoding?

Answer 1

Encoding code
try {
encodedOs = MimeUtility.encode(bos, "base64");
ObjectOutputStream oos = new ObjectOutputStream(encodedOs);
oos.writeObject(inputData);
oos.flush();
oos.close();
} catch (IOException ioExcep) {
ioExcep.printStackTrace();
} catch (MessagingException msgExcep) {
msgExcep.printStackTrace();
return baos.toString("UTF-8");
decoding code
BufferedInputStream bis1 = new BufferedInputStream
(new ByteArrayInputStream(inputData.getBytes()));
InputStream decIns = MimeUtility.decode(bis1, "base64");
ObjectInputStream ois = new ObjectInputStream(decIns);
object = ois.readObject();
ois.close();