Issues

• MultiSubnetFailover parallel connect fails if one address errors immediately (managed SNI)

  dotnet/SqlClient#4928 · Filter by author cheenamalhotra opened on Oct 27, 2026

• Packet multiplexing: async nvarchar(max) read returns corrupted value, throws ArgumentException or spins when the value starts in a packet with header ID 0

  dotnet/SqlClient#4925 · Filter by author MaceWindu opened on Oct 26, 2026
  3

• Failed streamed TVP request poison other requests in the application

  Bug

  dotnet/SqlClient#4921 · Filter by author m0a0k0s opened on Oct 26, 2026
  1

• Localize exception messages in Microsoft.Data.SqlClient.Extensions.Azure

  Task

  dotnet/SqlClient#4904 · Filter by author priyankatiwari08 opened on Oct 22, 2026

• Bump dependency versions for 8.0.0

  Task

  dotnet/SqlClient#4879 · Filter by author mdaigle opened on Oct 20, 2026 · 8.0.0
  2

• Switch MultiSubnetFailover on by default

  Breaking Change 🔨
  Task

  dotnet/SqlClient#4876 · Filter by author mdaigle opened on Oct 20, 2026 · 8.0.0-preview1
  1

  

• Mark System.Data.SqlClient as deprecated on nuget.org

  Task

  dotnet/SqlClient#4859 · Filter by author Frulfump opened on Oct 19, 2026
  1

• Zombified transaction executes and auto-commits SQL command

  Bug

  dotnet/SqlClient#4855 · Filter by author branko-d opened on Oct 17, 2026
  2

  

• TLS handshake has no timeout, one stalled handshake can stop a pool from creating any new connections indefinitely.

  Area\Connectivity
  Bug

  dotnet/SqlClient#4834 · Filter by author LukeButters opened on Oct 13, 2026
  2

  

• ref/ assemblies do not match implementation assembly API surfaces

  Bug

  dotnet/SqlClient#4826 · Filter by author edwardneal opened on Oct 10, 2026
  2

• Harden Azure Key Vault trusted endpoint matching

  Area\AKV Provider
  Feature

  dotnet/SqlClient#4802 · Filter by author paulmedynski opened on Oct 7, 2026 · 8.0.0-preview1
  1

  

• Proposal: generate sync attestation methods from the async ones with a source generator

  dotnet/SqlClient#4799 · Filter by author virzak opened on Oct 7, 2026
  3

• Replace internal connection pool state enum with a boolean

  Feature

  dotnet/SqlClient#4795 · Filter by author priyankatiwari08 opened on Oct 6, 2026
  1

  

• SqlDataReader.GetFieldValue<byte[]>() cannot be used to read a native SQL Server JSON column.

  Bug

  dotnet/SqlClient#4758 · Filter by author KyMback opened on Sep 26, 2026
  2

  

• Pool pruning can retire a pool during physical connection creation and cause unexpected transaction promotion (reproduces on 6.1 V1)

  Area\Connection Pooling
  Bug

  dotnet/SqlClient#4755 · Filter by author priyankatiwari08 opened on Sep 25, 2026 · 8.0.0-preview1
  1

  

• Retry async pool acquisition in the connection factory after pool shutdown

  Feature

  dotnet/SqlClient#4720 · Filter by author mdaigle opened on Sep 22, 2026
  1

• Ensure channel-pool shutdown reports shutdown rather than timeout

  Bug

  dotnet/SqlClient#4719 · Filter by author mdaigle opened on Sep 22, 2026
  1

• [aw] SqlClient Issue Auto-Triage reported incomplete result

  agentic-workflows
  dotnet/SqlClient#4716 · Filter by author github-actions opened on Sep 21, 2026
  2

  

• Disable ICR separately from connect retry count

  Feature

  dotnet/SqlClient#4709 · Filter by author jhudsoncedaron opened on Sep 17, 2026
  8

• [aw] SqlClient Issue Auto-Triage reported incomplete result

  agentic-workflows
  dotnet/SqlClient#4704 · Filter by author github-actions opened on Sep 17, 2026
  23

  

• Deadlock when a cancelled OpenAsync enlists in an ambient TransactionScope (Pooling=false)

  Area\Connectivity
  Bug

  dotnet/SqlClient#4696 · Filter by author SimonCropp opened on Sep 16, 2026
  3

• Early cancellation of a table-lock-blocked INSERT can remain pending until holder release

  dotnet/SqlClient#4691 · Filter by author bullmurf opened on Sep 15, 2026
  3

• Managed SNI + MARS: unobserved NullReferenceException in SniTcpHandle.ReceiveAsync when the physical connection is disposed while the demuxer is still receiving (reliable repro)

  Repro Available ✔️
  Bug

  dotnet/SqlClient#4679 · Filter by author billpeet opened on Sep 11, 2026 · 8.0.0-preview1
  1

  

• SqlException.IsTransient returns false for TCP Provider error 35 (broken pipe) — transport-level failures should be considered transient

  dotnet/SqlClient#4665 · Filter by author Crownpack07 opened on Sep 9, 2026
  3

• Enable UseOverallConnectTimeoutForPoolWait by default in 8.1

  Area\Connection Pooling
  Task

  dotnet/SqlClient#4642 · Filter by author mdaigle opened on Sep 3, 2026 · 8.0.0
  4