HTTP Timeout does not work

[szerwi]

Here are my client's settings:

influxdb.setWriteOptions(WriteOptions().writePrecision(precision).batchSize(1).bufferSize(360).flushInterval(3600).retryInterval(5).maxRetryInterval(300).maxRetryAttempts(0));
influxdb.setHTTPOptions(HTTPOptions().httpReadTimeout(4000));

In connection params I set the address that does not exist.

Expected behavior:
influxdb.writePoint() should fail after 4 seconds.

Actual behavior:
It fails after about 15 seconds.

Specifications:

• Library Version: 3.8.0
• InfluxDB Version: 2.0.7
• Board/ESP chip: ESP32
• Device Arduino SDK version: ESP32 2.0.0-alpha1

[vlastahajek]

@szerwi, thanks for raising this issue. You are most probably using HTTPS for connecting to the server.
There is a problem that underlying WifiClientSecure has hardcoded timeout for establishing a secured connection 15s.
The overall initial client timeout is about 20s, because there is the MFLN negotiation before the first server request is sent, which has a hardcoded timeout 5s. And then comes the server request that timeouts in 15s.

[szerwi]

Hi. Unfortunately, I'm using HTTP on ESP32, not ESP8266.

[vlastahajek]

Aha, my bad, sorry, I've overlooked your info, let me check again..

[vlastahajek]

@szerwi, it is possible set connection timeout for ESP32 for HTTP connection. But it will not work for HTTPS, because timeout connection is not implemented there yet.

[szerwi]

@vlastahajek For the HTTP connection, do I need to set it using ESP32 libraries or using Influxdb library and functions that I've posted above?

[vlastahajek]

@szerwi, I've pushed the fix for this library. Just update the library from the master. No need to do any changes in your sources.

[szerwi]

Why setting the timeout still won't work over HTTPS? Is it dependent from you or is it a bug in ESP32 libraries?

[vlastahajek]

It is the problem in the WifiClientSecure in the ESP32 SDK (tested in 1.0.6). I will post new issue there later.

[vlastahajek]

FYI, my fix for ESP32 is merged. It should be part of the next release.