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https://issues.apache.org/jira/browse/HDDS-14079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arafat Khan resolved HDDS-14079.
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Fix Version/s: 2.2.0
Resolution: Fixed
> Fix Recon startup failures during schema upgrades due to race conditions
> -------------------------------------------------------------------------
>
> Key: HDDS-14079
> URL: https://issues.apache.org/jira/browse/HDDS-14079
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Arafat Khan
> Assignee: Arafat Khan
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.2.0
>
>
> *Problem:*
> During cluster upgrades, Recon fails to start due to race conditions between
> schema upgrades and service initialization. Multiple components attempt to
> access database columns before the upgrade framework adds them, causing
> SQLSyntaxErrorException and startup failures.
> *Root Causes:*
> 1. ReconTaskStatusUpdaterManager reads RECON_TASK_STATUS table during Guice
> injection, before schema upgrades run
> 2. ReconTaskStatusMetrics registers and queries the table during start(),
> before upgrades complete
> 3. NSSummaryAggregatedTotalsUpgrade requires currentOMMetadataManager which
> is not set during startup
> *Impact:*
> - Recon starts successfully during upgrades without schema-related crashes
> - Upgrade handlers can access required dependencies
> - No functional changes to steady-state behaviour
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