MTOM cached file corrupted and threshold parameter: bug?

[bl...@libero.it]

Hi, I'm using Axis2 (ADB binding). I enabled caching for MTOM 
attachments (my service receives 80-100MB files) and I noticed 
something that appears to be a bug.
When the threshold is under 1000 (byte) the cached file is corrupted: 
it's missing a fragment whose size is (xbuffer-threshold) where 
xbuffer has size values like 892 or 878 bytes.
In other words the cached file is composed like this: (threshold 
bytes) + (remaining data starting after xbuffer bytes).
Is this perhaps a bug in PartFactory or related class?

<Snippet from PArtFactory.java>
                     ...
                     // We need to read the input stream to determine whether
                     // the size is bigger or smaller than the threshold.
                     BAAOutputStream baaos = new BAAOutputStream();
                     int t1 = 
BufferUtils.inputStream2OutputStream(dross, baaos, thresholdSize);
                     int t2 
=  BufferUtils.inputStream2OutputStream(in, baaos, thresholdSize - t1);
                     int total = t1 + t2;

                     if (total < thresholdSize) {
                         return new PartOnMemoryEnhanced(headers, 
baaos.buffers(), baaos.length());
                     } else {
                         // A BAAInputStream is an input stream over 
a list of non-contiguous 4K buffers.
                         BAAInputStream baais =
                             new BAAInputStream(baaos.buffers(), 
baaos.length());

                         part = new PartOnFile(manager, headers,
                                               baais,
                                               in,
                                               attachmentDir);
                     }

It's as if the second InputStream (in) we pass in the constructor is 
not starting at byte threshold+1 but a bit later in the stream.
Anyway, has someone else noticed this behavior? The crucial point is: 
am I safe in a production environment if I set threshold to 1000 (in 
my tests this setting appears to work correctly)?
Thank you a lot for any help.

Alessandro Malatesta


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