Hello everyone,
we came accross an inconsistency which we are not able to find an
explanation for and giving up after having spent on it the whole morning...
From a restxq we call an external REST service (InfluxDB) like shown in
[1]. This usually works as expected returning a response forged as in [2].
When the same RESTXQ is deployed in a much more complex application
(with several RESTXQ modules and REPO modules) the first call (which
takes a lot of time because it incurs the initial compiling delay)
returns [3] instead of [2]. From the second call onwards the result
stabilizes correctly to [2].
If I call any other RESTXQ function as a sort of warm-up (spending there
all the initial delay) [1] behaves correctly returning always [2].
Do you please have a clue on why this happens?
We noticed it for the first time because we started to use service jobs
which cause this access pattern ...
Thanks for any help.
[1]
module namespace test = 'test';
declare
%rest:path("test")
%rest:GET
function test:test() {
let $url :=
"http://localhost:8086/query?pretty=false&chunked=false&db=nestway&q=SELECT+*+FROM+%22frontoffice%22+WHERE+time+%3E%3D+%272019-05-01T00%3A00%3A00Z%27+AND+time+%3C%3D+%272019-05-31T23%3A59%3A50Z%27";
let $results := http:send-request(<http:request method="get"/>, $url)
return $results
};
[2]
<http:response xmlns:http="http://expath.org/ns/http-client";
status="200" message="OK">
<http:header name="Transfer-Encoding" value="chunked"/>
<http:header name="Connection" value="close"/>
<http:header name="X-Influxdb-Version" value="1.1.1"/>
<http:header name="Date" value="Thu, 16 May 2019 11:05:59 GMT"/>
<http:header name="Request-Id"
value="95b729c7-77ca-11e9-8065-000000000000"/>
<http:header name="Content-Type" value="application/json"/>
<http:body media-type="application/json"/>
</http:response>
<json type="object">
<results type="array">
<_ type="object">
<series type="array">
<_ type="object">
<name>frontoffice</name>
<columns type="array">
<_>time</_>
<_>consumable</_>
<_>customer</_>
<_>guests</_>
<_>type</_>
<_>user</_>
</columns>
<values type="array">
<_ type="array">
<_>2019-05-10T21:55:00Z</_>
<_>access</_>
<_>c9a83ce3-c938-4677-a0df-72bc96354509</_>
<_ type="number">0</_>
<_>starttimer</_>
<_>d50de945-23ed-4b33-84e8-8ef533a96fb7</_>
</_>
</values>
</_>
</series>
</_>
</results>
</json>
[3]
<http:response xmlns:http="http://expath.org/ns/http-client";
status="200" message="OK">
<http:header name="Transfer-Encoding" value="chunked"/>
<http:header name="Connection" value="close"/>
<http:header name="X-Influxdb-Version" value="1.1.1"/>
<http:header name="Date" value="Thu, 16 May 2019 11:19:30 GMT"/>
<http:header name="Request-Id"
value="7957030a-77cc-11e9-8066-000000000000"/>
<http:header name="Content-Type" value="application/json"/>
<http:body media-type="application/json"/>
</http:response>
map {
"results": [map {
"series": [map {
"values": [["2019-05-10T21:55:00Z", "access",
"c9a83ce3-c938-4677-a0df-72bc96354509", 0.0e0, "starttimer",
"d50de945-23ed-4b33-84e8-8ef533a96fb7"]],
"name": "frontoffice",
"columns": ["time", "consumable", "customer", "guests", "type",
"user"]
}]
}]
}
