Logstash Technical Preview Metrics Elastic-Agent Integration fails on 8.12.2 but works on 8.11.3

[iamhowardtheduck]

The "logstash.node" stream gives the following error "failed eval: no such key: successes" with the following reason "Error extracting routing: source didn't contain any routing fields" on version 8.12.2. The integration version is still the most recent at 2.4.1. Ran elastic-agent version 8.11.3 with no issues, upgraded to 8.12.2 and noticed the Overview, Nodes Overview, Node Overview, & Node Overview Advanced View dashboard ceased to populate; however the Pipeline Overview & Pipeline Details Overview was unaffected. Downgraded agent to 8.11.3 and the "logstash.node" metrics started flowing again.

Change in elastic-agent version for collecting logstash metrics:

Dashboard now working after the downgrade:

When events stopped flowing:

[mbudge]

ahhhhh just spent 1.5 hours trying to work out why the dashboards weren't working. Upgraded to 8.12.2 last week.