Code0x58 commented on pull request #3597:
URL: https://github.com/apache/incubator-heron/pull/3597#issuecomment-674511696
Thanks!
The UI server continues to be able to serve multiple HTTP requests in
parallel, it just may take longer to respond as it make requests to the tracker
sequentially now. Using async requests would be a nice change again, but that
may be nicer/almost free in the future after changing the tracker to use
FastAPI, as the generated OpenAPI spec may be usable to auto-generate client
libs.
The _"Topology Metrics"_ didn't always render to some of timelines. The logs
made it look like multiplication was failing as it expected the 2nd timeseries
to be univariate but `[""]` wasn't present, and there was another exception
that looked related where the timeseries used in backpressure calculation
didn't contain even `[{"data": {}}]`.
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