Agent v2.19.0

New persistent queue utilization and disk buffer failure metrics, OTTL v0.154.0, Docker source migrated to the moby client, plus reliability fixes and a Go runtime security upgrade.

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June 16, 2026

New Features

  • ed.buffer.disk.utilization Metric: Added an ed.buffer.disk.utilization metric that reports the current utilization of the persistent queue, giving operators visibility into how full the disk-backed buffer is for each destination node.
  • ed.buffer.disk.failed Metric: Added an ed.buffer.disk.failed metric that counts disk write failures in the persistent buffer, improving observability into queue health.
  • OTTL v0.154.0: Upgraded the OTTL engine to v0.154.0, bringing in the latest upstream bug fixes and enhancements from the OpenTelemetry Transformation Language project.

Improvements

  • Docker Source Library Migration: Migrated the Docker source node to the moby client, replacing the legacy Docker client library.
  • Compactor Client EOF Handling: Hardened the compactor client against EOF errors during request streams, improving reliability under transient network conditions.

Bug Fixes

  • ConnectionMonitor Deadlock: Fixed a deadlock in ConnectionMonitor that could occur when per-interface channels filled up.
  • File Watcher Retries: Fixed file watcher retries for failed source removals.
  • OTTL Nil Dereference: Fixed an OTTL crash loop caused by a nil dereference in the custom transform context.

Security

  • Go Runtime Upgrade: Upgraded the Go runtime to 1.26.4 to address known vulnerabilities.