diff --git a/.vsts-dotnet-ci.yml b/.vsts-dotnet-ci.yml
index cd05b1802e..2d2c930a09 100644
--- a/.vsts-dotnet-ci.yml
+++ b/.vsts-dotnet-ci.yml
@@ -18,41 +18,41 @@ trigger:
 
 resources:
   containers:
-  - container: CentosContainer
-    image: mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-mlnet
+  # - container: CentosContainer
+  #   image: mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-mlnet
 
-  - container: UbuntuContainer
-    image: mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet
+  # - container: UbuntuContainer
+  #   image: mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet
 
-  - container: UbuntuCrossArmContainer
-    image: mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet-cross-arm
+  # - container: UbuntuCrossArmContainer
+  #   image: mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet-cross-arm
 
   - container: UbuntuCrossArm64Container
     image: mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet-cross-arm64
 
 jobs:
-- template: /build/ci/job-template.yml
-  parameters:
-    architecture: arm
-    name: Ubuntu_x64_cross_arm_Net60
-    buildScript: ./build.sh
-    container: UbuntuCrossArmContainer
-    customMatrixes:
-      Debug_Build:
-        _configuration: Debug
-        _config_short: DI
-        _includeBenchmarkData: false
-        _targetFramework: net6.0
-      Release_Build:
-        _configuration: Release
-        _config_short: RI
-        _includeBenchmarkData: true
-        _targetFramework: net6.0
-    innerLoop: true
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals build.ubuntu.1804.amd64.open
-    helixQueue: Ubuntu.1804.ArmArch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     architecture: arm
+#     name: Ubuntu_x64_cross_arm_Net60
+#     buildScript: ./build.sh
+#     container: UbuntuCrossArmContainer
+#     customMatrixes:
+#       Debug_Build:
+#         _configuration: Debug
+#         _config_short: DI
+#         _includeBenchmarkData: false
+#         _targetFramework: net6.0
+#       Release_Build:
+#         _configuration: Release
+#         _config_short: RI
+#         _includeBenchmarkData: true
+#         _targetFramework: net6.0
+#     innerLoop: true
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals build.ubuntu.1804.amd64.open
+#     helixQueue: Ubuntu.1804.ArmArch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm32v7
 
 - template: /build/ci/job-template.yml
   parameters:
@@ -66,68 +66,68 @@ jobs:
         _config_short: DI
         _includeBenchmarkData: false
         _targetFramework: net6.0
-      Release_Build:
-        _configuration: Release
-        _config_short: RI
-        _includeBenchmarkData: true
-        _targetFramework: net6.0
+      # Release_Build:
+      #   _configuration: Release
+      #   _config_short: RI
+      #   _includeBenchmarkData: true
+      #   _targetFramework: net6.0
     innerLoop: true
     pool:
       name: NetCore-Public
       demands: ImageOverride -equals build.ubuntu.1804.amd64.open
     helixQueue: Ubuntu.1804.ArmArch.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm64v8
 
-- template: /build/ci/job-template.yml
-  parameters:
-    name: Centos_x64_Net60
-    buildScript: ./build.sh
-    container: CentosContainer
-    innerLoop: true
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals build.ubuntu.1804.amd64.open
-    helixQueue: Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-mlnet-helix
-
-- template: /build/ci/job-template.yml
-  parameters:
-    name: Ubuntu_x64_Net60
-    buildScript: ./build.sh
-    container: UbuntuContainer
-    innerLoop: true
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals build.ubuntu.1804.amd64.open
-    helixQueue: Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet-helix
-
-- template: /build/ci/job-template.yml
-  parameters:
-    name: MacOS_x64_Net60
-    buildScript: ./build.sh
-    innerLoop: true
-    pool:
-      vmImage: macOS-12
-    helixQueue: OSX.1200.Amd64.Open
-
-- template: /build/ci/job-template.yml
-  parameters:
-    architecture: arm64
-    name: MacOS_cross_arm64_Net6
-    buildScript: ./build.sh
-    customMatrixes:
-      Debug_Build:
-        _configuration: Debug
-        _config_short: DI
-        _includeBenchmarkData: false
-        _targetFramework: net6.0
-      Release_Build:
-        _configuration: Release
-        _config_short: RI
-        _includeBenchmarkData: true
-        _targetFramework: net6.0
-    innerLoop: true
-    pool:
-      vmImage: macOS-12
-    helixQueue: OSX.1100.Arm64.Open
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: Centos_x64_Net60
+#     buildScript: ./build.sh
+#     container: CentosContainer
+#     innerLoop: true
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals build.ubuntu.1804.amd64.open
+#     helixQueue: Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:centos-7-mlnet-helix
+
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: Ubuntu_x64_Net60
+#     buildScript: ./build.sh
+#     container: UbuntuContainer
+#     innerLoop: true
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals build.ubuntu.1804.amd64.open
+#     helixQueue: Ubuntu.1804.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-mlnet-helix
+
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: MacOS_x64_Net60
+#     buildScript: ./build.sh
+#     innerLoop: true
+#     pool:
+#       vmImage: macOS-12
+#     helixQueue: OSX.1200.Amd64.Open
+
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     architecture: arm64
+#     name: MacOS_cross_arm64_Net6
+#     buildScript: ./build.sh
+#     customMatrixes:
+#       Debug_Build:
+#         _configuration: Debug
+#         _config_short: DI
+#         _includeBenchmarkData: false
+#         _targetFramework: net6.0
+#       Release_Build:
+#         _configuration: Release
+#         _config_short: RI
+#         _includeBenchmarkData: true
+#         _targetFramework: net6.0
+#     innerLoop: true
+#     pool:
+#       vmImage: macOS-12
+#     helixQueue: OSX.1100.Arm64.Open
 
 - template: /build/ci/job-template.yml
   parameters:
@@ -140,11 +140,11 @@ jobs:
         _config_short: DI
         _includeBenchmarkData: false
         _targetFramework:  net6.0
-      Release_Build:
-        _configuration: Release
-        _config_short: RI
-        _includeBenchmarkData: false
-        _targetFramework:  net6.0
+      # Release_Build:
+      #   _configuration: Release
+      #   _config_short: RI
+      #   _includeBenchmarkData: false
+      #   _targetFramework:  net6.0
     innerLoop: true
     vsTestConfiguration: "/Framework:.NETCoreApp,Version=v6.0"
     pool:
@@ -152,47 +152,47 @@ jobs:
       demands: ImageOverride -equals 1es-windows-2019-open
     helixQueue: windows.11.arm64.open
 
-- template: /build/ci/job-template.yml
-  parameters:
-    name: Windows_x64_Net6
-    buildScript: build.cmd
-    innerLoop: true
-    vsTestConfiguration: "/Framework:.NETCoreApp,Version=v3.1"
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals 1es-windows-2019-open
-    helixQueue: Windows.10.Amd64.Open
-
-- template: /build/ci/job-template.yml
-  parameters:
-    name: Windows_x64_NetFx461
-    buildScript: build.cmd
-    customMatrixes:
-      Debug_Build:
-        _configuration: Debug
-        _config_short: DFX
-        _includeBenchmarkData: false
-        _targetFramework: net462
-      Release_Build:
-        _configuration: Release
-        _config_short: RFX
-        _includeBenchmarkData: false
-        _targetFramework: net462
-    innerLoop: true
-    vsTestConfiguration: "/Framework:.NETCoreApp,Version=v4.0"
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals 1es-windows-2019-open
-    helixQueue: Windows.10.Amd64.Open
-
-- template: /build/ci/job-template.yml
-  parameters:
-    name: Windows_x86_Net6
-    architecture: x86
-    buildScript: build.cmd
-    innerLoop: true
-    vsTestConfiguration: "/Framework:.NETCoreApp,Version=v3.1"
-    pool:
-      name: NetCore-Public
-      demands: ImageOverride -equals 1es-windows-2019-open
-    helixQueue: Windows.10.Amd64.Open
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: Windows_x64_Net6
+#     buildScript: build.cmd
+#     innerLoop: true
+#     vsTestConfiguration: "/Framework:.NETCoreApp,Version=v3.1"
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals 1es-windows-2019-open
+#     helixQueue: Windows.10.Amd64.Open
+
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: Windows_x64_NetFx461
+#     buildScript: build.cmd
+#     customMatrixes:
+#       Debug_Build:
+#         _configuration: Debug
+#         _config_short: DFX
+#         _includeBenchmarkData: false
+#         _targetFramework: net462
+#       Release_Build:
+#         _configuration: Release
+#         _config_short: RFX
+#         _includeBenchmarkData: false
+#         _targetFramework: net462
+#     innerLoop: true
+#     vsTestConfiguration: "/Framework:.NETCoreApp,Version=v4.0"
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals 1es-windows-2019-open
+#     helixQueue: Windows.10.Amd64.Open
+
+# - template: /build/ci/job-template.yml
+#   parameters:
+#     name: Windows_x86_Net6
+#     architecture: x86
+#     buildScript: build.cmd
+#     innerLoop: true
+#     vsTestConfiguration: "/Framework:.NETCoreApp,Version=v3.1"
+#     pool:
+#       name: NetCore-Public
+#       demands: ImageOverride -equals 1es-windows-2019-open
+#     helixQueue: Windows.10.Amd64.Open
diff --git a/src/Microsoft.ML.Data/DataView/CacheDataView.cs b/src/Microsoft.ML.Data/DataView/CacheDataView.cs
index 4c2491e09a..e6c8755edf 100644
--- a/src/Microsoft.ML.Data/DataView/CacheDataView.cs
+++ b/src/Microsoft.ML.Data/DataView/CacheDataView.cs
@@ -1320,7 +1320,7 @@ public virtual void Freeze()
 
             private sealed class ImplVec<T> : ColumnCache<VBuffer<T>>
             {
-                // The number of rows cached.
+                // The number of rows cached.  Only to be accesssed by the Caching thread.
                 private int _rowCount;
                 // For a given row [r], elements at [r] and [r+1] specify the inclusive
                 // and exclusive range of values for the two big arrays. In the case
@@ -1384,10 +1384,10 @@ public override void CacheCurrent()
 
                 public override void Fetch(int idx, ref VBuffer<T> value)
                 {
-                    Ctx.Assert(0 <= idx && idx < _rowCount);
-                    Ctx.Assert(_rowCount < Utils.Size(_indexBoundaries));
-                    Ctx.Assert(_rowCount < Utils.Size(_valueBoundaries));
-                    Ctx.Assert(_uniformLength > 0 || _rowCount <= Utils.Size(_lengths));
+                    Ctx.Assert(0 <= idx);
+                    Ctx.Assert((idx + 1) < Utils.Size(_indexBoundaries));
+                    Ctx.Assert((idx + 1) < Utils.Size(_valueBoundaries));
+                    Ctx.Assert(_uniformLength > 0 || idx < Utils.Size(_lengths));
 
                     Ctx.Assert(_indexBoundaries[idx + 1] - _indexBoundaries[idx] <= int.MaxValue);
                     int indexCount = (int)(_indexBoundaries[idx + 1] - _indexBoundaries[idx]);