diff --git a/README.md b/README.md
index ae051460c..a56e9e5de 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@
2.4* |
- v2.1.0 |
+ v2.1.1 |
3.0 |
diff --git a/benchmark/scala/pom.xml b/benchmark/scala/pom.xml
index 44ddd8d22..4dd4207b0 100644
--- a/benchmark/scala/pom.xml
+++ b/benchmark/scala/pom.xml
@@ -3,7 +3,7 @@
4.0.0
com.microsoft.spark
microsoft-spark-benchmark
- 2.1.0
+ 2.1.1
2019
UTF-8
diff --git a/docs/release-notes/2.1.1/release-2.1.1.md b/docs/release-notes/2.1.1/release-2.1.1.md
new file mode 100644
index 000000000..8ef69dd5a
--- /dev/null
+++ b/docs/release-notes/2.1.1/release-2.1.1.md
@@ -0,0 +1,203 @@
+# .NET for Apache Spark 2.1.1 Release Notes
+
+### New Features/Improvements
+
+* Add base classes for ML and refine code base ([#1031](https://github.com/dotnet/spark/pull/1031), [#1049](https://github.com/dotnet/spark/pull/1049))
+* Capture dotnet application error stack trace ([#1047](https://github.com/dotnet/spark/pull/1047))
+* JvmBridge semaphore fix ([#1061](https://github.com/dotnet/spark/pull/1061))
+
+### Bug Fixes
+
+* None
+
+### Infrastructure / Documentation / Etc.
+
+* Switch to 1ES hosted pools on main ([#1021](https://github.com/dotnet/spark/pull/1021))
+
+### Breaking Changes
+
+* None
+
+### Known Issues
+
+* Broadcast variables do not work with [dotnet-interactive](https://github.com/dotnet/interactive) ([#561](https://github.com/dotnet/spark/pull/561))
+* UDFs defined using class objects with closures does not work with [dotnet-interactive](https://github.com/dotnet/interactive) ([#619](https://github.com/dotnet/spark/pull/619))
+* In [dotnet-interactive](https://github.com/dotnet/interactive) blocking Spark methods that require external threads to unblock them does not work. ie `StreamingQuery.AwaitTermination` requires `StreamingQuery.Stop` to unblock ([#736](https://github.com/dotnet/spark/pull/736))
+
+### Compatibility
+
+#### Backward compatibility
+
+The following table describes the oldest version of the worker that the current version is compatible with, along with new features that are incompatible with the worker.
+
+
+
+
+ Oldest compatible Microsoft.Spark.Worker version |
+
+
+
+
+ v2.0.0 |
+
+
+
+
+#### Forward compatibility
+
+The following table describes the oldest version of .NET for Apache Spark release that the current worker is compatible with.
+
+
+
+
+ Oldest compatible .NET for Apache Spark release version |
+
+
+
+
+ v2.0.0 |
+
+
+
+
+### Supported Spark Versions
+
+The following table outlines the supported Spark versions along with the microsoft-spark JAR to use with:
+
+
+
+
+ Spark Version |
+ microsoft-spark JAR |
+
+
+
+
+ 2.4.0 |
+ microsoft-spark-2-4_2.11-2.1.1.jar |
+
+
+ 2.4.1 |
+
+
+ 2.4.3 |
+
+
+ 2.4.4 |
+
+
+ 2.4.5 |
+
+
+ 2.4.6 |
+
+
+ 2.4.7 |
+
+
+ 2.4.2 |
+ Not supported |
+
+
+ 3.0.0 |
+ microsoft-spark-3-0_2.12-2.1.1.jar |
+
+
+ 3.0.1 |
+
+
+ 3.0.2 |
+
+
+ 3.1.1 |
+ microsoft-spark-3-1_2.12-2.1.1.jar |
+
+
+ 3.1.2 |
+
+
+ 3.2.0 |
+ microsoft-spark-3-2_2.12-2.1.1.jar |
+
+
+ 3.2.1 |
+
+
+
+
+### Supported Delta Versions
+
+The following table outlines the supported Delta versions along with the Microsoft.Spark.Extensions version to use with:
+
+
+
+
+ Delta Version |
+ Microsoft.Spark.Extensions.Delta |
+
+
+
+
+ 0.1.0 |
+ 2.1.1 |
+
+
+ 0.2.0 |
+
+
+ 0.3.0 |
+
+
+ 0.4.0 |
+
+
+ 0.5.0 |
+
+
+ 0.6.0 |
+
+
+ 0.6.1 |
+
+
+ 0.7.0 |
+
+
+ 0.8.0 |
+
+
+ 1.0.0 |
+
+
+ 1.1.0 |
+
+
+
+
+### Supported Hyperspace Versions
+
+The following table outlines the supported Hyperspace versions along with the Microsoft.Spark.Extensions version to use with:
+
+
+
+
+ Hyperspace Version |
+ Microsoft.Spark.Extensions.Hyperspace |
+
+
+
+
+ 0.1.0 |
+ 2.1.1 |
+
+
+ 0.2.0 |
+
+
+ 0.3.0 |
+
+
+ 0.4.0 |
+
+
+
diff --git a/eng/Versions.props b/eng/Versions.props
index 941719d67..e3a8cf7f9 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -1,7 +1,7 @@
- 2.1.0
+ 2.1.1
prerelease
diff --git a/src/scala/pom.xml b/src/scala/pom.xml
index 50c618ba8..890af92b8 100644
--- a/src/scala/pom.xml
+++ b/src/scala/pom.xml
@@ -7,7 +7,7 @@
${microsoft-spark.version}
UTF-8
- 2.1.0
+ 2.1.1