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mbrandonw's profile
Brandon Williams
Brandon Williams
Brandon Williams
@mbrandonw

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Brandon Williams

@mbrandonw

Subterranean homesick mathematician. Working on https://www.pointfree.co  Available for hire: http://www.fewbutripe.com/hire-me 

Brooklyn, NY
fewbutripe.com
Joined October 2009

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    Brandon Williams‏ @mbrandonw Aug 7
    • Report Tweet

    Brandon Williams Retweeted Point-Free

    Very annoying outage this morning. We have struggled with regular outages due to what appears to be a bug in Linux Foundation, and it’s impossible to debug with no stack traces. It’s also something that only started with Swift 4. Server side swift can be rough sometimes.https://twitter.com/pointfreeco/status/1159064382791458816 …

    Brandon Williams added,

    Point-Free @pointfreeco
    Sorry everyone, our site was down for a few hours this morning, but now it is back. 😥
    4:36 AM - 7 Aug 2019
    • 2 Retweets
    • 35 Likes
    • Nacho Soto Javi Shannon Potter Igor Kravchenko Moritz Lang Stephen Celis Michael Vilabrera Point-Free Pofat
    4 replies 2 retweets 35 likes
      1. New conversation
      2. Ian Partridge‏ @alfa Aug 7
        • Report Tweet
        Replying to @mbrandonw

        Which bits of Foundation do you use?

        1 reply 0 retweets 0 likes
      3. Brandon Williams‏ @mbrandonw Aug 7
        • Report Tweet
        Replying to @alfa

        It’s mostly URLSession, URL and URLRequest. We think the foundation bug is in URLSession/Request. There are times we can see in our logs that a request starts but never finishes, even if timeouts are set and low. That eventually causes Heroku to kill our process.

        1 reply 0 retweets 0 likes
      4. 2 more replies
      1. New conversation
      2. Jason Zurita‏ @jasonalexzurita Aug 7
        • Report Tweet
        Replying to @mbrandonw

        Bummer! If you don't mind my asking, does the site auto-restart or have any redundancy built in?

        1 reply 0 retweets 0 likes
      3. Brandon Williams‏ @mbrandonw Aug 7
        • Report Tweet
        Replying to @jasonalexzurita

        Not really :/ So it seems the foundation bug is that certain URLSession requests never finish (regardless of timeouts), causing Heroku to kill the process. And it seems that when Heroku kills the process in that way, there's no way to restart. Or at least as far as I can tell 🤔

        1 reply 0 retweets 0 likes
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      2. Sven A. Schmidt‏ @_sa_s Aug 7
        • Report Tweet
        Replying to @mbrandonw @pointfreeco

        I’m sure you’ve seen swift-backtrace by @alfa but just in case:https://github.com/ianpartridge/swift-backtrace …

        1 reply 0 retweets 4 likes
      3. 3 more replies
      1. New conversation
      2. Daniel Alm‏ @daniel_a_a Aug 7
        • Report Tweet
        Replying to @mbrandonw @timburks

        This library has given me great stack traces on Linux: https://github.com/norio-nomura/SwiftBacktrace … Just make sure to compile with debug symbols, but that shouldn't cause any issues in production.

        1 reply 0 retweets 3 likes
      3. Daniel Alm‏ @daniel_a_a Aug 7
        • Report Tweet
        Replying to @daniel_a_a @mbrandonw @timburks

        Another option: https://github.com/ianpartridge/swift-backtrace … — used to give worse results than the other, but is said to have improved recently.

        0 replies 0 retweets 0 likes
      4. End of conversation

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