'Application insights | Sometimes End-to-end transaction details do not show all telemetry

I have .Net core App deployed on azure and enabled application insights. Sometimes Azure application insights End-to-end transaction details do not display all telemetry.

Here it only logs the error and not request or maybe request logged but both do not display together over here(difficult to find out due to many people use it)

Should be like:

Sometimes request log but with no error log.

What could be the reason for happening this? do I need to look into application insights specific set-up/feature?

Edit: As suggested by people here, try to disable the Sampling feature but still not works, Here is open question as well.

Solution 1:^[1]

This usually happens due to sampling. By default, adaptive sampling is enabled in the ApplicationInsights.config which basically means that only a certain percentage of each telemetry item type (Event, Request, Dependency, Exception, etc.) is sent to Application insights. In your example probably one part of the end to end transaction got sent to the server, another part got sampled out. If you want, you can turn off sampling for specific types, or completely remove the

AdaptiveSamplingTelemetryProcessor

from the config which completely disables sampling. Bear in mind that this leads to higher ingestion traffic and higher costs. You can also configure sampling in the code itself, if you prefer. Please find here a good overview of how sampling works and can be configured.

Solution 2:^[2]

This may be related to :

When using SDK 2.x, you have to track all events and send the telemetries to Application insights
When using auto-instrumentation with 3.x agent, in this case the agent collect automatically the traffic, logs ... and you have to pay attention to the sampling file applicationinsights.json where you can filter the events.
If you are using java, below the accepted Logging libraries :

-java.util.logging

-Log4j, which includes MDC properties

-SLF4J/Logback, which includes MDC properties

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Source: Stack Overflow

Solution	Source
Solution 1	Andreas Wendl
Solution 2	AceneKASDI

'Application insights | Sometimes End-to-end transaction details do not show all telemetry

Solution 1:[1]

Solution 2:[2]

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Solution 1:^[1]

Solution 2:^[2]