How to fix Error 5292 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: Error 5292 — Columnstore Index Delete Bitmap Corruption

Why This Error Happens

Error 5292 occurs when the internal Delete Bitmap structure associated with a columnstore index becomes logically inconsistent with its corresponding rowgroup and tuple metadata. This is typically caused by physical page corruption from storage subsystem faults (disk, SAN, or filesystem errors), an improper shutdown during an active delete/merge operation on the columnstore index, or bugs triggered by interrupted background tuple-mover tasks. It can also surface after restoring a database backup that was captured mid-transaction on a columnstore table without proper transaction log consistency.

Step-by-Step Resolution Guide

Step 1: Confirm the Scope of Corruption

  • Run DBCC CHECKDB (YourDatabaseName) WITH NO_INFOMSGS, ALL_ERRORMSGS to capture the full list of affected objects.
  • Note the exact rowgroup_id and tuple_id reported alongside Error 5292 for cross-referencing with sys.dm_db_column_store_row_group_physical_stats.
  • Check the SQL Server Error Log (C:\Program Files\Microsoft SQL Server\MSSQL17.MSSQLSERVER\MSSQL\Log\ERRORLOG) for related I/O or storage warnings (e.g., Error 823/824) that may indicate the root cause.

Step 2: Isolate and Rebuild the Affected Columnstore Index

  • Take the table offline from application workloads to prevent further writes during remediation.
  • Execute a targeted rebuild using:
  ALTER INDEX [YourColumnstoreIndexName] ON [dbo].[YourTableName] REBUILD;
  • If the rebuild fails or re-throws Error 5292, drop and recreate the columnstore index manually:
  DROP INDEX [YourColumnstoreIndexName] ON [dbo].[YourTableName];
  CREATE CLUSTERED COLUMNSTORE INDEX [YourColumnstoreIndexName] ON [dbo].[YourTableName];

Step 3: Check Underlying Storage and Windows Server Health

  • Open Event Viewer on Windows Server 2025 (eventvwr.msc) and inspect the System log for Disk, NTFS, or Storport errors correlating with the SQL Server error timestamp.
  • Run chkdsk C: /f /r (or the appropriate volume hosting your .mdf/.ndf files) during a maintenance window to rule out filesystem-level corruption.
  • Validate storage drivers and firmware are current, especially for virtualized or SAN-attached storage, since Windows Server 2025 introduced updated Storage Spaces Direct (S2D) stack behavior.

Step 4: Restore From a Clean Backup (If Rebuild Fails)

  • If the index cannot be rebuilt due to persistent corruption, restore the database from the last known-good full backup plus transaction logs:
  RESTORE DATABASE YourDatabaseName FROM DISK = 'D:\Backups\YourDatabaseName.bak' WITH NORECOVERY;
  RESTORE LOG YourDatabaseName FROM DISK = 'D:\Backups\YourDatabaseName_log.trn' WITH RECOVERY;
  • Re-run DBCC CHECKDB post-restore to confirm the Delete Bitmap inconsistency no longer appears.

Alternative or Verification Steps

  • After rebuilding or restoring, re-run DBCC CHECKDB (YourDatabaseName) WITH NO_INFOMSGS and confirm Error 5292 no longer appears in the output.
  • As an alternative, query sys.dm_db_column_store_row_group_physical_stats and compare total_rows vs deleted_rows for the affected rowgroup_id to ensure counts are now consistent with no orphaned bitmap entries.