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Without any order, here are debugging techniques that administrators can use to understand their issues:

Enable verbose log

Kestra had some management endpoints including one that allows changing logging verbosity at run time.

Inside the container (or in local if standalone jar is used), send this command to enable very verbose logging:

curl -i -X POST -H "Content-Type: application/json" \
  -d '{ "configuredLevel": "TRACE" }' \

Alternatively, you can change logging levels on configuration files:

    io.kestra.core.runners: TRACE

Take a thread dump

You can request a thread dump via the /threaddump endpoint available on the management port (8081 if not configured otherwise).