Getting error when using credential helper: "externally provided auth token was invalid"

[nqcuongit95]

Hi guys, I'm trying to use reclient with buildbarn. My authentication method uses a custom credential helper, in my case it was just echo hard coded json like this:

{     
        "token": "eyJhbGciOiJSUzI1NiJ9.eyJzdWIiOiJhZG1pbiIsImFjY2Vzc190b2tlbiI6InRlc3RfYnVpbGRiYXJuIiwidG9rZW5fdHlwZSI6IkJlYXJlciIsImV4cGlyZXNfaW4iOjB9.Buen5gwvRe5daKqajuscm-NK2hQ-zt3s9wQC_SXe_oeSVxmQCe-Hl0R99U5OxMX6xBitBcIVi6rcW1QKm81VTAWGdkLxY6BBBy9zElBd3otG3wb8AX7Zmjt5xz5zzbP0I0ocVye8w9OAR_wOiJ4ShQdhpfUXjeRgFgEw0H7cEbp-Fo6mydIMmkVGEH1USvxK-hlynfZ1X_y4AemQgN5YcyLAQ3apGTDll14-83RcWSlQ8z5NGqwNLpmuObNP9VHZ8fo6zIGNDwEcQV2WGMafx3JTsci6v4LgpAbuqyZeYq6PPoiubOPYoBL1svYsnjHXfWgJ5YKtimmCOLDm2SQOaA",
        "expiry":"Sat Mar 15 14:21:16 CET 2024",
        "refresh_expiry":"Sat Mar 15 14:21:16 CET 2024"
}

I was able to authenticate with my builbarn server using above token (send a GetCapabilities request via postman grpc) but reclient complain with error Command failed: rpc error: code = Unauthenticated desc = Unable to authenticate with RBE, externally provided auth token was invalid

This is a part in reproxy.Info log showing that the call to GetCapabilities fails

I0314 15:18:47.055880   11928 depsscannerclient.go:184] Connected to dependency scanner service on 127.0.0.1:58654
I0314 15:18:47.055978   11928 main.go:342] Finished setting up input processor
I0314 15:18:47.055978   11928 server.go:218] Startup status: Input Processor started? true, RBE connected (or disabled)? false, Startup error? false
I0314 15:18:47.639044   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
I0314 15:18:47.857893   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
I0314 15:18:48.130595   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
I0314 15:18:48.474757   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
I0314 15:18:48.802904   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
I0314 15:18:49.435857   11928 capabilities.go:68] call failed with err=rpc error: code = Unavailable desc = all SubConns are in TransientFailure, retrying.
E0314 15:18:49.435857   11928 main.go:373] Failed to initialize SDK client: rpc error: code = Unavailable desc = rpc error: code = Unavailable desc = retry budget exhausted (6 attempts): all SubConns are in TransientFailure, authentication type (identity) used="external authentication token (gcert?)"
I0314 15:18:49.443053   11928 server.go:218] Startup status: Input Processor started? true, RBE connected (or disabled)? false, Startup error? true

I also attached full log below, Any advice for troubleshooting this guys, many thanks!

fullog.zip

[kfarnung]

This looks similar to the behavior of #27. I saw a similar issue when using the current versoin in the Chromium codebase, but the fix for the bug landed in the next version. Try updating the reclient_version in DEPS to the latest version from https://chrome-infra-packages.appspot.com/p/infra/rbe/client/linux-amd64 (currently re_client_version:0.137.1.08a9f1e-gomaip).