Mocha Tests: "before all" hook for "should have completed a backup" failed

[flaky-bot]

This test failed!

To configure my behavior, see the Build Cop Bot documentation.

If I'm commenting on this issue too often, add the buildcop: quiet label and
I will stop commenting.

---

commit: d72e7de
buildURL: Build Status, Sponge
status: failed

Test output

Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
    at emitDeprecationWarning (internal/process/promises.js:111:13)
    at emitWarning (internal/process/promises.js:104:3)
    at emitPromiseRejectionWarnings (internal/process/promises.js:143:7)
    at process._tickCallback (internal/process/next_tick.js:69:34)

[flaky-bot]

commit: 43765d8
buildURL: Build Status, Sponge
status: failed

Test output

8 RESOURCE_EXHAUSTED: Quota exceeded for quota metric 'Administrative requests' and limit 'Administrative requests per minute' of service 'spanner.googleapis.com' for consumer 'project_number:1046198160504'.
Error: 8 RESOURCE_EXHAUSTED: Quota exceeded for quota metric 'Administrative requests' and limit 'Administrative requests per minute' of service 'spanner.googleapis.com' for consumer 'project_number:1046198160504'.
    at Object.callErrorFromStatus (node_modules/@grpc/grpc-js/build/src/call.js:30:26)
    at Object.onReceiveStatus (node_modules/@grpc/grpc-js/build/src/client.js:175:52)
    at listener.onReceiveStatus (node_modules/@grpc/grpc-js/build/src/call-stream.js:63:35)
    at Object.onReceiveStatus (node_modules/grpc-gcp/build/src/index.js:74:29)
    at InterceptingListenerImpl.onReceiveStatus (node_modules/@grpc/grpc-js/build/src/call-stream.js:58:23)
    at Object.onReceiveStatus (node_modules/@grpc/grpc-js/build/src/client-interceptors.js:341:141)
    at Object.onReceiveStatus (node_modules/@grpc/grpc-js/build/src/client-interceptors.js:304:181)
    at Http2CallStream.outputStatus (node_modules/@grpc/grpc-js/build/src/call-stream.js:115:74)
    at Http2CallStream.maybeOutputStatus (node_modules/@grpc/grpc-js/build/src/call-stream.js:154:22)
    at Http2CallStream.endCall (node_modules/@grpc/grpc-js/build/src/call-stream.js:140:18)
    at Http2CallStream.handleTrailers (node_modules/@grpc/grpc-js/build/src/call-stream.js:265:14)
    at emit (internal/http2/core.js:265:8)
    at process._tickCallback (internal/process/next_tick.js:63:19)

[skuruppu]

Error: 8 RESOURCE_EXHAUSTED: Quota exceeded for quota metric 'Administrative requests' and limit 'Administrative requests per minute' of service 'spanner.googleapis.com' for consumer 'project_number: <number>'

I believe this happens when there are a lot of presubmits are running concurrently. We have a lot of outstanding PRs currently due to earlier test failures. Once we get these working, I doubt we would run into this issue.