How to fix Error 4083 on Windows Server 2025 / Windows 11

by

Troubleshooting Guide: SQL Server Error 4083 – “Connection Recovered, Rowcount Not Available”

Why This Error Happens

This error occurs when SQL Server performs connection resiliency recovery after a transient network interruption (such as a dropped TCP session, firewall timeout, or cluster failover) between the client driver and SQL Server 2025. Because the original session’s transaction state could not be fully replayed on reconnection, the server discards the rowcount from the first query executed immediately after reconnection to preserve data integrity. This is a by-design safety mechanism of Idle Connection Resiliency, not a corruption or permissions issue, but it typically surfaces due to unstable network paths, aggressive firewall/NAT timeout settings, or load balancer session drops between the client and the Windows Server 2025 host.

Step-by-Step Resolution Guide

Step 1: Verify Network Stability Between Client and Server

  • Use ping -t <SQLServerIP> and tracert <SQLServerIP> over an extended period to check for packet loss or latency spikes.
  • Check Windows Event Viewer under Applications and Services Logs > Microsoft > Windows > TCPIP for dropped connection entries.
  • Confirm no intermediate firewall, VPN, or NAT device is silently closing idle TCP sessions (common default idle timeout is 300 seconds).

Step 2: Adjust Connection Resiliency and Timeout Settings

  • Open SQL Server Configuration Manager and verify the TCP/IP protocol is enabled for the correct instance.
  • In the client connection string, review the ConnectRetryCount and ConnectRetryInterval parameters (e.g., ConnectRetryCount=3;ConnectRetryInterval=10).
  • On Windows Server 2025, increase the TCP keep-alive interval via registry:
  • Path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  • Set KeepAliveTime (DWORD) to 30000 (30 seconds) and KeepAliveInterval to 1000.

Step 3: Re-Execute the Query to Confirm Rowcount Retrieval

  • Immediately after Error 4083 appears, run the exact same SELECT or UPDATE statement again.
  • Confirm that @@ROWCOUNT now returns a valid, non-null integer value.
  • Log the occurrence timestamp and cross-reference it with Step 1’s network logs to identify a pattern.

Step 4: Update SQL Server Native Client / ODBC Driver

  • Ensure you are using the latest Microsoft ODBC Driver 18+ for SQL Server or Microsoft.Data.SqlClient NuGet package compatible with SQL Server 2025.
  • Outdated drivers on Windows 11 client machines often mishandle the resiliency handshake, causing repeated 4083 errors even after a successful reconnect.

Step 5: Disable Connection Resiliency (If Troubleshooting Only)

  • As a diagnostic-only measure, temporarily set ConnectRetryCount=0 in the connection string to force a hard failure instead of a silent recovery.
  • This helps isolate whether the root cause is purely network-based or related to application-side transaction handling.

Alternative or Verification Steps

  • Verification: After implementing Step 2, monitor the application for 24–48 hours; if Error 4083 frequency drops to zero and @@ROWCOUNT consistently returns valid data on the first query, the fix is confirmed.
  • Alternative: If the error persists, bypass rowcount dependency entirely by using SCOPE_IDENTITY() or explicit OUTPUT clauses in your queries, which are unaffected by connection recovery rowcount loss.