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Problem report
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Resolution: Unresolved
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Trivial
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None
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None
Preprocessing does not process no data. Example, health check api (response code 200). It turns out that we use Javascript preprocessing to get the api status.
{if (value == '')
else
{ return 1; }}}
But when the api does not respond and we receive no data, preprocessing does not handle this, so there were no values. I think you need to add processing to preprocessing nodata.