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Backtest caused ERR_CONNECTION_TIMED_OUT
Ted Chou
posted Jun 22, 2019

Hi,

I have been running quite a few backtests. I am running 4 backtests at the same time and the are quite memory intensive because it uses quadratic calculations. Initially the backtest run fine, but after I check it after a few hours or so, the screen results doesn't show. I opened the console window and it seems like the server is not responding:

quanto_socket.js:56 WebSocket connection to 'wss://qexecbacktest-i-0739c4c1ef0ba3045.dynoquant.com/backtests/5d0dd5ad7f6fe761b71ae93c' failed: Error in connection establishment: net::ERR_CONNECTION_TIMED_OUT

Could anyone let me know why?
Thank you.
Ted.

1 response
Jamie McCorriston
Jun 24, 2019

Hi Ted,

Are you able to see whether or not the backtest is completed by looking at the list of backtests for your algorithm? Also, would you be willing to share the backtest ID of one of your backtests that's running into the issue? The backtest ID can be found in the URL of a backtest. The format is www.quantopian.com/algorithms/<algorithm_id>/<backtest_id>. With a backtest ID, I can take a look at some of our internal logging to see if we can figure out what happened.

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The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.