How to fix Error 3457 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: Error 3457 — Transactional File System Resource Manager Failed to Recover

Why This Error Happens

Error 3457 occurs when SQL Server 2025 attempts to recover the Common Log File System (CLFS) resource manager associated with FILESTREAM or FileTable data, but the underlying transaction log or marshalling area is corrupted, missing, or inaccessible. This is commonly caused by abrupt shutdowns, storage-level corruption, or improper NTFS permissions on the $FSLOG stream and FILESTREAM data containers. It can also surface after an improper restore or migration where the FILESTREAM filegroup paths were moved without re-initializing the resource manager.

Step-by-Step Resolution Guide

Step 1: Verify FILESTREAM Service Configuration

  • Open SQL Server Configuration Manager and confirm FILESTREAM access is enabled for the instance (right-click the SQL Server service → Properties → FILESTREAM tab).
  • Ensure Windows-level FILESTREAM sharing is also enabled via sc.exe or the Services MMC console.
  • Confirm the SQL Server service account has Full Control NTFS permissions on the FILESTREAM data container path (e.g., D:\SQLData\FileStreamContainer).

Step 2: Inspect and Repair the CLFS Log Files

  • Navigate to the FILESTREAM container directory and locate the hidden $FSLOG alternate data stream — this cannot be viewed directly but is managed via CLFS.
  • Run chkdsk D: /f /r on the volume hosting the FILESTREAM data to rule out underlying disk corruption.
  • If corruption is confirmed, take the affected database offline using:
  ALTER DATABASE [YourDB] SET OFFLINE WITH ROLLBACK IMMEDIATE;
  • Bring it back online to force a recovery attempt:
  ALTER DATABASE [YourDB] SET ONLINE;

Step 3: Rebuild the Resource Manager (If Log Is Unrecoverable)

  • If recovery still fails, detach the database:
  EXEC sp_detach_db 'YourDB';
  • Rename or move the corrupted FILESTREAM container folder (this forces SQL Server to create a fresh $FSLOG on next attach).
  • Re-attach the database using CREATE DATABASE ... FOR ATTACH, then restore FILESTREAM data from the most recent full backup if the container was wiped.

Step 4: Apply Latest Cumulative Update

  • Confirm you are running the latest Cumulative Update (CU) for SQL Server 2025, as early builds have known CLFS recovery timing issues on Windows Server 2025.
  • Check build number with:
  SELECT @@VERSION;
  • Download and apply the latest CU from the Microsoft Update Catalog if outdated.

Alternative or Verification Steps

  • After recovery, run DBCC CHECKDB('YourDB') WITH ALL_ERRORMSGS and query sys.database_recovery_status to confirm the database and FILESTREAM filegroup are in a healthy, ONLINE state.
  • If the issue persists, restore the entire database (including FILESTREAM filegroups) from a known-good backup to a new container path rather than attempting in-place repair.