From e67d0da8a357fa970c52d40e281f7990e1278635 Mon Sep 17 00:00:00 2001 From: Pengyuan Bian Date: Thu, 21 Jan 2021 20:47:34 +0000 Subject: [PATCH] Add upgrade notes about 1.7.x to 1.8 regarding http 1xx and 204. (#8785) --- .../news/releases/1.8.x/announcing-1.8/upgrade-notes/index.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/content/en/news/releases/1.8.x/announcing-1.8/upgrade-notes/index.md b/content/en/news/releases/1.8.x/announcing-1.8/upgrade-notes/index.md index ed4907a8aa..b3da0ed9b5 100644 --- a/content/en/news/releases/1.8.x/announcing-1.8/upgrade-notes/index.md +++ b/content/en/news/releases/1.8.x/announcing-1.8/upgrade-notes/index.md @@ -134,3 +134,7 @@ ingressGateways: - name: ISTIO_META_ROUTER_MODE value: "sni-dnat" {{< /text >}} + +## Connectivity issues among your proxies when updating from 1.7.x (where x < 5) + +When upgrading your Istio data plane from 1.7.x (where x < 5) to 1.8, you may observe connectivity issues between your gateway and your sidecars or among your sidecars with 503 errors in the log. This happens when 1.7.5+ proxies send HTTP 1xx or 204 response codes with headers that 1.7.x proxies reject. To fix this, upgrade all your proxies (gateways and sidecars) to 1.7.5+ as soon as possible. ([Issue 29427](https://github.com/istio/istio/issues/29427), [More information](https://github.com/istio/istio/pull/28450)) \ No newline at end of file