Issues

Regression since 6.1.4 / 5.1.9: "Nullable object must have a value" from SqlStatistics.ReleaseAndUpdateExecutionTimer with concurrent commands on a MARS connection
Bug
dotnet/SqlClient#4778 · opened on Oct 2, 2026
2
SqlDataReader.GetFieldValue<byte[]>() cannot be used to read a native SQL Server JSON column.
Bug
dotnet/SqlClient#4758 · opened on Sep 26, 2026
2
Exception thrown when streaming certain XML values via XmlReader
Bug
dotnet/SqlClient#4756 · opened on Sep 26, 2026 · 8.0.0-preview1
2
Pool pruning can retire a pool during physical connection creation and cause unexpected transaction promotion (reproduces on 6.1 V1)
Bug
dotnet/SqlClient#4755 · 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 · opened on Sep 22, 2026
1
Ensure channel-pool shutdown reports shutdown rather than timeout
Bug
dotnet/SqlClient#4719 · opened on Sep 22, 2026
1
Connection pooling/Windows Impersonation issue under replenishment
Bug
dotnet/SqlClient#4717 · opened on Sep 21, 2026
2
[aw] SqlClient Issue Auto-Triage reported incomplete result
dotnet/SqlClient#4716 · opened on Sep 21, 2026
2
Disable ICR separately from connect retry count
Feature
dotnet/SqlClient#4709 · opened on Sep 17, 2026
8
[aw] SqlClient Issue Auto-Triage exceeded daily AI credits budget
dotnet/SqlClient#4705 · opened on Sep 17, 2026
27
[aw] SqlClient Issue Auto-Triage reported incomplete result
dotnet/SqlClient#4704 · opened on Sep 17, 2026
23
Deadlock when a cancelled OpenAsync enlists in an ambient TransactionScope (Pooling=false)
Bug
dotnet/SqlClient#4696 · opened on Sep 16, 2026
3
Early cancellation of a table-lock-blocked INSERT can remain pending until holder release
dotnet/SqlClient#4691 · 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)
Bug
dotnet/SqlClient#4679 · 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
Bug
dotnet/SqlClient#4665 · opened on Sep 9, 2026
3
Enable UseOverallConnectTimeoutForPoolWait by default in 8.0
Task
dotnet/SqlClient#4642 · opened on Sep 3, 2026 · 8.0.0-preview1
2
Preserve the original exception when SqlDataReader teardown also times out
Bug
dotnet/SqlClient#4638 · opened on Sep 3, 2026
4
Improve the timeout error when closing an incompletely consumed SqlDataReader
Bug
dotnet/SqlClient#4639 · opened on Sep 3, 2026
2
Redesign configurable retry logic assembly loading (dedicated ALC and/or explicit registration API)
Feature
dotnet/SqlClient#4623 · opened on Sep 2, 2026 · 8.0.0-preview1
2
Support net462 in the perf test pipelines
Task
dotnet/SqlClient#4618 · opened on Aug 31, 2026
2
Modern PR pipeline does not exercise managed SNI for Unit/Functional tests
Task
dotnet/SqlClient#4605 · opened on Aug 27, 2026 · 8.0.0-preview1
1
Pipeline-script Pester suites are never run in CI
Task
dotnet/SqlClient#4603 · opened on Aug 26, 2026
2
SqlConnectionInternal starts a fresh ConnectTimeout for in-open round trips instead of honoring the caller's remaining timeout
Bug
dotnet/SqlClient#4582 · opened on Aug 24, 2026
2
Test coverage: non-SQL-Server TDS endpoints (Synapse dedicated + on-demand, Fabric DW, Dataverse)
Task
dotnet/SqlClient#4580 · opened on Aug 24, 2026
2
Support ClientCertificate keyword in Connection String
Feature
dotnet/SqlClient#4551 · opened on Aug 18, 2026 · 8.0.0-preview1
3