HDInsight clusters on 4.0/5.0 — retired Mar 31, 2025, migrate to 5.1

AzureDeprecations & retirementsTeam planSeverity: criticalazure.hdinsight

HDInsight 4.0 and 5.0 were retired on March 31, 2025 — Microsoft may remove, disable or delete these clusters at any time; rebuild on HDInsight 5.1

What LeftSize checks

HDInsight 4.0 and 5.0 reached end of support and retirement on March 31, 2025.

Why it matters

Missed retirement and end-of-support dates turn into forced upgrades, outages or extended support charges at a moment you did not choose.

What you get in the GitHub issue

LeftSize runs this check from a scheduled GitHub Action with a read-only identity in your Azure account and opens one issue per scope, updated on every scan. The issue includes:

  • The affected resources, grouped per subscription, resource group or account and region
  • Background on why it was flagged and when it is a false positive
  • Step-by-step remediation with safety checks
  • Cost and operational impact of fixing it
  • Ready-to-run fix scripts (CLI, PowerShell or Terraform where available)
  • Alternative approaches and their trade-offs
  • Snooze, ignore or report a finding with a comment on the issue
Install LeftSizeIncluded in the Team and Business plans.

Official references