changelog/fragments/1728652985-Dont-fail-checkin-if-upgrade-action-not-found.yaml

# Kind can be one of:
# - breaking-change: a change to previously-documented behavior
# - deprecation: functionality that is being removed in a later release
# - bug-fix: fixes a problem in a previous version
# - enhancement: extends functionality but does not break or fix existing behavior
# - feature: new functionality
# - known-issue: problems that we are aware of in a given version
# - security: impacts on the security of a product or a user’s deployment.
# - upgrade: important information for someone upgrading from a prior version
# - other: does not fit into any of the other categories
kind: feature

# Change summary; a 80ish characters long description of the change.
summary: Dont fail checkin if upgrade action not found

# Long description; in case the summary is not enough to describe the change
# this field accommodate a description without length limits.
# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
description:
  On agent checkin, when an agent has upgrade details, the corresponding agent action is looked up and linked with APM spans.
  However, there may be cases where such an action does not exist, e.g. when running `elastic-agent upgrade` for a Fleet-managed agent.
  This change ensures that agent checkin does not fail if the agent has upgrade details but no corresponding action.

# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
component:

# PR URL; optional; the PR number that added the changeset.
# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
# Please provide it if you are adding a fragment for a different PR.
pr: https://github.com/elastic/fleet-server/pull/3991

# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
# If not present is automatically filled by the tooling with the issue linked to the PR number.
#issue: https://github.com/owner/repo/1234