yvonne
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In case anyone else stumbled across this thread, someone helped me find a solution in the lab.js Slack channel. Basically, the idea is to add more time for the data to submit. Here is the advice: Add a sequence with a “data transmission” template on…
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Hi Kristian, sorry for the late reply too, I got absorbed in other projects. Your summary is correct except for 34% of participants having a complete loss of data (the number of people with any type of issue is higher) The EntityStreamException not…
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Hi Kristian, thanks to the help of someone in the lab who helped me click through the study repeatedly, we could reproduce the error (see below). Attached is the log file of the day. The error happenend at the end of a study that was started at arou…
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Dear Kristian, while it might be possible, I think the probability is relatively low. The internet connection in Switzerland should be ok for the most part (except for remote mountain villages, but almost no one lives there). Could the EntityStream…
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Dear Kristian, thank you for taking a look at the logs! Great to hear that it was probably not a server issue. The wrong link seems a little weird, but since the study was conducted with students, maybe someone forwarded a wrong link to their peers …
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Dear Kristian, I apologize for the delayed answer, pre-christmas stress caught up with me. Thank you very much for pointing me in the right direction! :) I was finally able to access and download the logs (after some additional failed attempts). I h…
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Dear Kristian, I am not sure if you still need it, but below is the study I exported from JATOS. Concerning the logs: I finally managed to get to the application-logs, but I am lost on how I should download them or send them to you (I have very lim…
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Dear Kristian, yes, unfortunately, the study is relatively long (45min - 1h) and attempts to replicate the error are therefore quite time consuming. Concerning the logs: I can neither find the "application-log" nor JATOS itself on my serv…
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Dear Kristian, here is the final update after data collection has ended: the data loss did not decrease after adjusting maximum request size 213 participants indicated that they completed the study, but we only have 140 data sets on the server, ind…
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Thank you Kristian! I adjusted the maximum request size. I will let you know if the problem persists or not. Best, Yvonne
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Dear Kristian, thank you for your reply! The individual data size can vary, depending on the mouse-clicking behavior of the participants. It usually is around 3-5MB. However, there are also participants with only 2.6MB or as much as 9.0MB. Unfortuna…
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Hi Kristian, thank you for your reply! I checked the GitHub exchange and I can at least say that I was hosting very few participants in parallel (max 20) and I think I have large enough server size (2vCPUs, 2GB memory, 3TB transfer, 25GB SSD). The …
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I saw that this question has already been answered in another thread, so I deleted my comment.
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Dear E.J., thank you! I will use GitHub in the future. Best, yvonne
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Hi Kristian, indeed, I did not choose the correct droplet. Thank you so much for helping me out with such a silly mistake! Best, Yvonne
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Hi Kristian, thank you for the good wishes and sorry to bother you again. I have tried to set up a server several times now, but I can't get it to work. Same as before, I have specified the "User Data" in DigitalOcean as indicated in the …
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Hi Kristian, thank you for your help. I do have access to a server terminal, but I do not know what H2 or MySQL are and I suppose that means doing the overwriting is something above my programming skill. I do have the data and studies saved, so noth…
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Hi Kristian, thank you for your answer. Unfortunately, I don't have another admin user. I guess there is no other solution? Best, Yvonne
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Hi Kristian, no worries, I just wanted to let people know that I was not looking for a solution for Apache + JATOS anymore. I switched to your recommendation (JATOS + Traefik) this morning and that worked like a charm, thank you! Before that, I did…
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Just for info: I gave up on trying to solve this (nothing worked). I might try to use Nginx instead of Apache.
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Hi Kristian, thank you for your time and help! I am using Ubuntu 18.10, Apache 2.4.34 and JATOS 3.3.2. Here is the content of the .conf file (server name is a placeholder). ServerName mydomain.com <VirtualHost *:80> ServerAdmin webmast…