[TAP5-1116] Live lock when using compressed and virtual assets due to ByteArrayOutputStream being synchronized

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.2.0, 5.1.0.8
• Fix Version/s: 5.2.0
• Component/s: tapestry-core
• Assignee: Howard M. Lewis Ship
• Reporter: Howard M. Lewis Ship
• Created: 27/Apr/10 15:09
• Updated: 28/Apr/10 03:44
• Resolved: 28/Apr/10 03:44

Description

VirtualAssetStreamer in 5.1 and StackAssetRequestHandler in 5.2 are both affected by this bug. The scenario is many concurrent threads but slow connections; one thread starts to write buffered content (buffered inside a ByteArrayOutputStream) to a client; BAOS.writeTo(OutputStream) is synchronized: while that is occuring, no other thread can write that buffered content to any client.

Solution is to not use ByteArrayOutputStream is a content buffer; instead create a class that tracks the content inside a byte array.