From 23ceae6de46f672bf14fe6d0ad19c57ee3531fa6 Mon Sep 17 00:00:00 2001
From: John McDole <codefu@google.com>
Date: Thu, 15 Aug 2024 12:07:05 -0700
Subject: [PATCH] Update RBE troubleshooting (#54568)

Add `could not get valid Application Default Credentials token` troubleshooting
---
 docs/rbe/rbe.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/docs/rbe/rbe.md b/docs/rbe/rbe.md
index 6de0293cfd5c8..b4fd9a5cf6248 100644
--- a/docs/rbe/rbe.md
+++ b/docs/rbe/rbe.md
@@ -145,6 +145,20 @@ of the single parameter `rebase_path()`.
 
 ## Troubleshooting
 
+### Error obtaining credentials
+
+If you get the following error while running `et build`:
+
+```shell
+E0815 09:30:03.169505 1413247 main.go:147] Error obtaining credentials: application default credentials were invalid: could not get valid Application Default Credentials token: oauth2: cannot fetch token: 400 Bad Request
+```
+
+Check your `${HOME}/.config/gcloud/application_default_credentials.json` to see if you are signed into another project / account. Run the following to reset the default credentials:
+
+```shell
+gcloud auth application-default login
+```
+
 ### Slow builds
 
 RBE builds can be slow for a few different reasons. The most common reason is