[Performance API] pastAlerts timing out

[Austin Paul]

Hello,

It seems that the pastAlerts endpoint of the performance API can no longer respond to queries of the form https://performanceapi.mbta.com/developer/api/v2.1/pastalerts?format=json&from_datetime=1637051401&to_datetime=1637137800

For most of the last month, any request for 24 hours of alerts will return HTTP code 500 after 60 seconds with the body:

{ "error": { "message": "Failed to get past alerts data" }}

I would love to still be able to pull all alerts for a 24 hours period at once. Is this something that can be fixed? Is there a convenient workaround?

Thank you,

Austin

[Developer at MBTA]

Hi Austin,

Thanks for bringing this to our attention. We investigated the issue and found an optimization that should resolve it. Please let us know if you're still getting these 60-second timeouts after today.

—Developer@MBTA

[Austin Paul]

Hi,

Thank you for addressing this! I am seeing far fewer of these timeouts, but still more than would be ideal.

It's intermittent enough that a 3x retry on my end is not enough to guarantee a successful response.

Best,

Austin

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[Developer at MBTA]

Hi Austin,

Thanks for the heads-up. We've made some additional optimizations, and are no longer seeing any timeouts in our testing. Please let us know if you continue to see them after today, and if there is a specific request with a high incidence of timeouts we can use to reproduce the issue.

—Developer@MBTA

[Austin Paul]

Thanks for continuing to work on this!

The responses were quite speedy (<10s response times) for the remainder of December, but they seem to be creeping upwards, and I'm starting to see timeouts again (though not as consistently).

The following query takes ~45 seconds when successful, but tends to error out when I send two requests at the same time.

https://realtime.mbta.com/developer/api/v2.1/pastalerts?format=json&from_datetime=1641285001&to_datetime=1641371400

I am able to increase the number of retries on my end as a work-around if it turns out this is as good as it will get.

Thank you,

Austin

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