Troubleshooting¶
Unable to connect to the ODKCentral server over http (i.e. insecure)¶
By default, ODKCentral API connections are verified with SSL certificates. However, sometimes, users may encounter issues connecting to ODK Central with self-signed certificates. This is common for developers if running ODK Central in a local subnet without a public domain name.
Here are some steps to troubleshoot and resolve the issue:
- Add the certificate to your system trusted certificate store.
If you are using a self-signed certificate, make sure to add it to your system's trusted certificate store. For Ubuntu/Debian users, follow the steps below:
In a terminal:
sudo apt update && sudo apt install ca-certificates
sudo cp cert.crt /usr/local/share/ca-certificates/
sudo update-ca-certificates
If running OSM Fieldwork within the Field Mapping Tasking Manager, this is handled for you.
Q: Can I disable SSL verification (not recommended)
A: If you have tried the above step and still cannot connect to ODK Central, you can disable SSL verification for the certificate. However, this is not recommended as it will connect to ODK Central insecurely. To do this, add the environment variable ODK_CENTRAL_SECURE=False to your system.
Additional Troubleshooting Steps¶
If you are still unable to connect to the ODKCentral server over HTTP:
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Verify that the ODK Central API URL is correct
Make sure that you have entered the correct ODK Central API URL in your OSM Fieldwork configuration file. You can check the URL by logging into ODK Central and navigating to the "Site Configuration" page.
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Check that the ODK Central server is running
Make sure that the ODK Central server is running and accessible. You can check the server status by navigating to the ODK Central API URL in your web browser.
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Check that the ODK Central server is reachable from your network
Make sure that your network is not blocking the connection to the ODK Central server. You can try pinging the server from your computer to see if there is a network issue.
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Check that your firewall is not blocking the connection
Make sure that your firewall is not blocking the connection to the ODK Central server. You can try temporarily disabling your firewall to see if this resolves the issue.
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Check the ODK Central server logs
Check the ODK Central server logs to see if there are any error messages related to the connection. This can help identify the root cause of the issue.
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Try using a different web browser
If you are having trouble connecting to ODK Central through a web browser, try using a different browser to see if the issue persists. It is possible that the issue is related to the browser or its settings.
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Update OSM Fieldwork and ODK Central to the latest version
Make sure that you are using the latest version of OSM Fieldwork and ODK Central. Check the OSM Fieldwork and ODK Central release notes to see if any updates address the issue you are experiencing.