[FLINK-7515] allow actual 0-length content in NettyMessage#allocateBuffer()

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.4.0
• Component/s: Runtime / Network
• Assignee: Nico Kruber
• Reporter: Nico Kruber
• Created: 25/Aug/17 11:19
• Updated: 06/Nov/17 15:22
• Resolved: 06/Nov/17 15:22

Description

Previously, length 0 meant "unknown content length" but there are cases where the actual length is 0 and we do not need a larger buffer. Let's use -1 for tagging the special case instead.

Issue Links

• links to: GitHub Pull Request #4592