SeekableInMemoryByteChannel.truncate misimplements the contract --------------------------------------------------------------- Key: SHRINKWRAP-470 URL: https://issues.jboss.org/browse/SHRINKWRAP-470 Project: ShrinkWrap Issue Type: Bug Reporter: Under Flowerpot At the tail end of truncate, is this logic: {code} // If we've been given a size greater than we are if (newSize > currentSize) { // Reset the position only this.position = newSize; } {code} which is not what the API says: "If the given size is less than the current size then the entity is truncated, discarding any bytes beyond the new end. If the given size is greater than or equal to the current size then the entity is not modified." I think you wanted this instead, which should be inside the above array truncation: {code} // If we've been given a size less than we are if (newSize < currentSize) { // Reset the size only this.size = newSize; } {code}