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APM version 8.15

Fix fallback memory limit check conversion from Bytes to Gigabytes 13838
Fix Elasticsearch apm-data plugin to fallback to ILM policy for data streams using default APM integration and not explicitly migrated to data stream lifecycle. More details are available in the APM known issues page 13918
Remove from logs the error reason returned by Elasticsearch for x_content_parse_exception error 13853
Fix ingestion failure when ip resource attribute has value 0.0.0.0 in OpenTelemetry events from Jaeger 13852
Fix possible nil pointer dereference when parsing stacktraces in OpenTelemetry events 13852
Fix missing tracking in instrumentation metrics for certain request-level status codes from Elasticsearch bulk responses 13853

Avoid data race due to reuse of bytes.Buffer in ES bulk requests 13155
APM Server now relies on the Elasticsearch apm-data plugin’s index templates, which reverts some unsafe uses of flattened field types 12066
Add error.id to jaeger errors 13196
Process host.ip resource attribute for OTel 13614
Fix a bug where indexed OpenTelemetry events and their aggregated metrics may contain incorrect label values from other events when the affected OpenTelemetry event has resource attribute values that are slices. This bug may also cause a panic with a message like "panic: runtime error: slice bounds out of range [-4:]" from apm-aggregation library. 13822

Integration custom ingest pipelines logs-apm.integration@custom, metrics-apm.integration@custom, and traces-apm.integration@custom are no longer supported. Any existing pipelines above will need to be moved to the more fine-grained \*-apm*@custom ingest pipelines 12066

Add elasticsearch.flushed.uncompressed.bytes metric 13155
APM Server now relies on the Elasticsearch apm-data plugin’s index templates, removing the requirement to install the APM integration package 12066
Upgraded bundled APM Java agent attacher CLI to version 1.50.0 13326
Enable Kibana curated UIs to work with hostmetrics from OpenTelemetry’s hostmetricsreceiver 13196
Add require data stream to bulk index requests 13398
Support self-instrumentation when in managed mode by getting tracing configs via reloader 13514 13653 13691 13790
Add mapping for OpenTelemetry attribute messaging.destination.name to derive service.target correctly 13472
APM Server now automatically retries document-level 429s from Elasticsearch to avoid dropping data. output.elasticsearch.max_retries now controls both request-level and document-level retries, and defaults to 3. 13620