key_values.json has missing values at start of service

[wvangeit]

A dynamic service receives some of its input values, like integers/strings etc from the key_values.json in the input directory.
Sometimes these values are only partially filled in at the start of the service. To make things more stable for the user, it would be good that at least easy to retrieve variables, like parameters, are immediately available at the start of the service.

In my own service I have worked around this by polling the file until everything I need is available, but this is not ideal.

If this is really a fundamental issue that can't really be solved, it would be good that we at least provide the users an api to standardize the polling etc (i.e. an api to retreive the input values)

[wvangeit]

@pcrespov FYI, as discussed earlier today. Feel free to assign

[wvangeit]

And @pcrespov , this is not an issue for my service anymore atm, because i have expanded the polling.

[wvangeit]

This is affecting usability again, because there are studies runs where these values never appear (although the inputs are coming from integer/string parameters that are not changed compared to runs that did work)