Question

I am using javax.imageio.ImageIO to write a BufferedImage b into a byte array and finally to a file. 1 out of 10 times when creating the byte array, a java.lang.IndexOutOfBoundsException is thrown. It is not reproducible by just using the same image though.

BufferedImage img = ...
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// the next line will lead to the exception being thrown
ImageIO.write(img, "png", baos);
byte[] byteArray = baos.toByteArray()

Result is:

java.lang.IndexOutOfBoundsException
Line | Method
->>  166 | seek                       in
javax.imageio.stream.FileCacheImageOutputStream
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|    227 | close                      in     ''
|   1570 | write . . . . . . . . . .  in javax.imageio.ImageIO

I found a bug report, seemingly describing the same problem. But I cannot find a fix though it’s from 2010.

Any ideas? Work arounds? Links to ressources?

Help is highly appreciated!

Answer 1

It is indeed a bug.
Though, if you read through the report you’ll see…

CUSTOMER SUBMITTED WORKAROUND :

Use a memory cache.

Try to utilize a MemoryCacheImageOutputStream instead, until the bug is squashed eventually.

ImageIO.write(img, "png", new MemoryCacheImageOutputStream(baos));