No sample available for this bucket APM

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Kibana version:
Elasticsearch version:
APM Server version:
APM Agent language and version:
nodejs and 3.6.1
Browser version:

Original install method (e.g. download page, yum, deb, from source, etc.) and version:

Fresh install or upgraded from other version?
Is there anything special in your setup? For example, are you using the Logstash or Kafka outputs? Are you using a load balancer in front of the APM Servers? Have you changed index pattern, generated custom templates, changed agent configuration etc.

Description of the problem including expected versus actual behavior. Please include screenshots (if relevant):
we have installed fresh APM server and agent on kubernetes service (nodejs agent). Everything is working (agent and server), but in transaction section sample are not available for any path, see screenshots

in agent configuration we implicitly set also transactionsamplerate=1.0, but any way no sample are available, only in screenshot visible /hc call samples are available, which is readiness probe health check path.

Could you please support to understand what is problem
Steps to reproduce:

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Hi and welcome to the forum :wave:

Usually this happens when the sampling rate is set to 0 so that there are no samples to look at.

Do you have multiple instances of your service that may be configured with different sampling rates? Could you send me as snippet of the code where you configure the agent?

Thank you for warm greeting
Based on documentation if sampling rate is not set in agent by default rate is set 1.0, right?
but even explicitly we set transactionSampleRate parameter 1.0 and it doesn't help

we have configured agent only in one service yet
here is code part of agent configuration

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