[FLINK-18695] Allow NettyBufferPool to allocate heap buffers

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: Runtime / Network
• Labels: pull-request-available
• Assignee: Yun Gao
• Reporter: Chesnay Schepler
• Created: 23/Jul/20 17:54
• Updated: 15/Sep/20 09:39
• Resolved: 15/Sep/20 09:39

Description

in 4.1.43 netty made a change to their SslHandler to always use heap buffers for JDK SSLEngine implementations, to avoid an additional memory copy.

However, our NettyBufferPool forbids heap buffer allocations.

We will either have to allow heap buffer allocations, or create a custom SslHandler implementation that does not use heap buffers (although this seems ill-adviced?).

/cc sewen uce NicoK zjwang pnowojski

Issue Links

• blocks: FLINK-18660 Bump netty to 4.1.49
• links to: GitHub Pull Request #13272