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[gateway] Missing back-pressure handling #918

lbovet opened this Issue Dec 1, 2017 · 1 comment


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lbovet commented Dec 1, 2017

Expected Behavior

Streaming big contents should impact the memory consumption in a controlled way.

Current Behavior

The flow of the request and response bodies is currently not controlled. If a backend or client is reading slowly, the internal buffering can lead to OutOfMemoryError.

Possible Solution

Add back-pressure methods to the WriteStream (gateway-api) and implement them for the ProxyConnection and VerxtHttpResponse delegating to the underlying Vert.x back-pressure methods.

Steps to Reproduce (for bugs)

Setup a slowly consuming client/backend and GET/PUT a multi-GB file through it.


Have APIs supporting content delivery (typically as ZIP file) in a scalable way.

Your Environment

  • Version used: 1.11.4
  • Browser Name and version: netcat/curl piped into stdbuf and hexdump to simulate slow consumption
  • Operating System and version: Ubuntu 17.04

@lbovet lbovet changed the title from Missing back-pressure handling to [gateway] Missing back-pressure handling Dec 1, 2017


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@brasseld brasseld closed this Dec 14, 2017

@NicolasGeraud NicolasGeraud added this to the 1.12.0 milestone Dec 14, 2017

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