BytesWritable length problem
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Key: HADOOP-8272
URL: https://issues.apache.org/jira/browse/HADOOP-8272
Project: Hadoop Common
Issue Type: Bug
Components: io
Affects Versions: 0.20.205.0
Reporter: Simon Gilliot
I tried to create my own Writable which contains a BytesWritable.
In my conctructor, I tried to create an empty BytesWritable :
BytesWritable key = new BytesWritable();
Next, in my readFields, I did :
key.readFields(in); LOG.debug(Bytes.toString(key.getBytes()));
The key contains much more bytes than I had wrote.
In fact, if my BytesWritable contains 100 bytes, I thing that the readFields()
of BytesWritable call :
* setSize(0) (which seems useless since the values in the old range are
preserved and any new values are undefined). * setSize(100) which extends the
bytes array (by setCapacity) to 1.5 * the size (so 150) without initalizing it
* readFully(bytes, 0, 100) which fill the bytes array from '0' to '100' offsets.
And when I call getBytes() on it, the bytes array of 150 bytes is returned
without any control.
That seems possible that the same problem happens in other conditions, when we
increase ths bytes array size.
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