elastic · valeriy42 · Nov 19, 2025 · Nov 18, 2025 · Nov 18, 2025 · Nov 18, 2025
diff --git a/.buildkite/pipelines/build_linux.json.py b/.buildkite/pipelines/build_linux.json.py
@@ -36,7 +36,7 @@
       "cpu": "6",
       "ephemeralStorage": "20G",
       "memory": "64G",
-      "image": os.getenv("DOCKER_IMAGE", "docker.elastic.co/ml-dev/ml-linux-build:32")
+      "image": os.getenv("DOCKER_IMAGE", "docker.elastic.co/ml-dev/ml-linux-build:32a")
    },
    "aarch64": {
       "provider": "aws",
@@ -101,7 +101,7 @@ def main(args):
               "cpu": "6",
               "ephemeralStorage": "20G",
               "memory": "64G",
-              "image": "docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:15"
+              "image": "docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:15a"
             },
             "commands": [
               ".buildkite/scripts/steps/build_and_test.sh"

diff --git a/3rd_party/licenses/pytorch-INFO.csv b/3rd_party/licenses/pytorch-INFO.csv
@@ -1,2 +1,2 @@
 name,version,revision,url,license,copyright,sourceURL
-PyTorch,2.5.1,a8d6afb511a69687bbb2b7e88a3cf67917e1697e,https://pytorch.org,BSD-3-Clause,,
+PyTorch,2.7.1,e2d141dbde55c2a4370fac5165b0561b6af4798b,https://pytorch.org,BSD-3-Clause,,
diff --git a/build-setup/linux.md b/build-setup/linux.md
@@ -329,7 +329,7 @@ Then copy the shared libraries to the system directory:
 (cd /opt/intel/oneapi/mkl/2024.0 && tar cf - lib) | (cd /usr/local/gcc103 && sudo tar xvf -)
 ```
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 (This step requires a reasonable amount of memory. It failed on a machine with 8GB of RAM. It succeeded on a 16GB machine. You can specify the number of parallel jobs using environment variable MAX_JOBS. Lower number of jobs will reduce memory usage.)
 
@@ -348,7 +348,7 @@ sudo /usr/local/gcc103/bin/python3.10 -m pip install install numpy pyyaml setupt
 Then obtain the PyTorch code:
 
 ```
-git clone --depth=1 --branch=v2.5.1 git@github.com:pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 git@github.com:pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -383,7 +383,7 @@ export USE_MKLDNN=ON
 export USE_QNNPACK=OFF
 export USE_PYTORCH_QNNPACK=OFF
 [ $(uname -m) = x86_64 ] && export USE_XNNPACK=OFF
-export PYTORCH_BUILD_VERSION=2.5.1
+export PYTORCH_BUILD_VERSION=2.7.1
 export PYTORCH_BUILD_NUMBER=1
 /usr/local/gcc103/bin/python3.10 setup.py install
 ```

diff --git a/build-setup/macos.md b/build-setup/macos.md
@@ -127,7 +127,7 @@ Download the graphical installer for Python 3.10.9 from <https://www.python.org/
 
 Install using all the default options.  When the installer completes a Finder window pops up.  Double click the `Install Certificates.command` file in this folder to install the SSL certificates Python needs.
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 PyTorch requires that certain Python modules are installed.  To install them:
 
@@ -138,7 +138,7 @@ sudo /Library/Frameworks/Python.framework/Versions/3.10/bin/pip3.10 install nump
 Then obtain the PyTorch code:
 
 ```
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -252,7 +252,7 @@ export DNNL_TARGET_ARCH=AARCH64
 export USE_MKLDNN=ON
 export USE_QNNPACK=OFF
 export USE_PYTORCH_QNNPACK=OFF
-export PYTORCH_BUILD_VERSION=2.5.1
+export PYTORCH_BUILD_VERSION=2.7.1
 export PYTORCH_BUILD_NUMBER=1
 /Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 setup.py install
 ```

diff --git a/build-setup/windows.md b/build-setup/windows.md
@@ -193,7 +193,7 @@ On the "Advanced Options" screen, check "Install for all users" and "Add Python
 
 For the time being, do not take advantage of the option on the final installer screen to reconfigure the machine to allow paths longer than 260 characters.  We still support Windows versions that do not have this option.
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 (This step requires a lot of memory. It failed on a machine with 12GB of RAM. It just about fitted on a 20GB machine. 32GB RAM is recommended.)
 
@@ -209,7 +209,7 @@ Next, in a Git bash shell run:
 
 ```
 cd /c/tools
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -265,7 +265,7 @@ set USE_QNNPACK=OFF
 set USE_PYTORCH_QNNPACK=OFF
 set USE_XNNPACK=OFF
 set MSVC_Z7_OVERRIDE=OFF
-set PYTORCH_BUILD_VERSION=2.5.1
+set PYTORCH_BUILD_VERSION=2.7.1
 set PYTORCH_BUILD_NUMBER=1
 python setup.py install
 ```

diff --git a/dev-tools/docker/README.md b/dev-tools/docker/README.md
@@ -36,15 +36,15 @@ required to build the machine learning C++ code dependencies:
 2. Change the Dockerfile and build a new image to be used for subsequent builds on this branch.
 3. Update the version to be used for builds in docker files that refer to it.
 
-### Depends on: ml-linux-build:32
+### Depends on: ml-linux-build:32a
 
 ### Build script: dev-tools/docker/build_linux_dependency_builder_image.sh
 
 
 
 ## Repository: ml-linux-build
 
-### Latest version: 32
+### Latest version: 32a
 
 ### Comments
 A Docker image that can be used to compile the machine learning
@@ -63,7 +63,7 @@ used for subsequent builds on this branch.
 
 ## Repository: ml-linux-aarch64-cross-build
 
-### Latest version: 15
+### Latest version: 15a
 
 ### Comments
 A Docker image that can be used to compile the machine learning
@@ -82,7 +82,7 @@ used for subsequent builds on this branch.
 
 ## Repository: ml-linux-aarch64-native-build
 
-### Latest version: 15
+### Latest version: 15a
 
 ### Comments
 A Docker image that can be used to compile the machine learning

diff --git a/dev-tools/docker/build_linux_aarch64_cross_build_image.sh b/dev-tools/docker/build_linux_aarch64_cross_build_image.sh
@@ -22,7 +22,7 @@
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-aarch64-cross-build
-VERSION=15
+VERSION=15a
 
 set -e
 

diff --git a/dev-tools/docker/build_linux_aarch64_native_build_image.sh b/dev-tools/docker/build_linux_aarch64_native_build_image.sh
@@ -34,7 +34,7 @@ sleep 5
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-aarch64-native-build
-VERSION=13
+VERSION=15a
 
 set -e
 

diff --git a/dev-tools/docker/build_linux_build_image.sh b/dev-tools/docker/build_linux_build_image.sh
@@ -34,7 +34,7 @@ sleep 5
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-build
-VERSION=30
+VERSION=32a
 
 set -e
 

diff --git a/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile b/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:15
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:15a
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 

diff --git a/dev-tools/docker/linux_aarch64_cross_image/Dockerfile b/dev-tools/docker/linux_aarch64_cross_image/Dockerfile
@@ -27,7 +27,7 @@ RUN \
 RUN \
   mkdir -p /usr/local/sysroot-aarch64-linux-gnu/usr && \
   cd /usr/local/sysroot-aarch64-linux-gnu/usr && \
-  wget --quiet -O - https://s3-eu-west-2.amazonaws.com/ml-cpp-artifacts/dependencies/usr-aarch64-linux-gnu-15.tar.bz2 | tar jxf - && \
+  wget --quiet -O - https://s3-eu-west-2.amazonaws.com/ml-cpp-artifacts/dependencies/usr-aarch64-linux-gnu-15a.tar.bz2 | tar jxf - && \
   cd .. && \
   ln -s usr/lib lib && \
   ln -s usr/lib64 lib64

diff --git a/dev-tools/docker/linux_aarch64_native_builder/Dockerfile b/dev-tools/docker/linux_aarch64_native_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:15
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:15a
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 

diff --git a/dev-tools/docker/linux_aarch64_native_image/Dockerfile b/dev-tools/docker/linux_aarch64_native_image/Dockerfile
@@ -35,7 +35,7 @@ ARG build_dir=/usr/src
 # Build gcc 10.3
 RUN \
   cd ${build_dir} && \
-  wget --quiet -O - http://ftpmirror.gnu.org/gcc/gcc-10.3.0/gcc-10.3.0.tar.gz | tar zxf - && \
+  wget --quiet -O - https://mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-10.3.0/gcc-10.3.0.tar.gz | tar zxf - && \
   cd gcc-10.3.0 && \
   contrib/download_prerequisites && \
   sed -i -e 's/$(SHLIB_LDFLAGS)/-Wl,-z,relro -Wl,-z,now $(SHLIB_LDFLAGS)/' libgcc/config/t-slibgcc && \
@@ -141,7 +141,7 @@ RUN \
 # If the PyTorch branch is changed also update PYTORCH_BUILD_VERSION
 RUN \
   cd ${build_dir} && \
-  git -c advice.detachedHead=false clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+  git -c advice.detachedHead=false clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
   cd pytorch && \
   git submodule sync && \
   git submodule update --init --recursive && \
@@ -155,7 +155,7 @@ RUN \
   export USE_MKLDNN=ON && \
   export USE_QNNPACK=OFF && \
   export USE_PYTORCH_QNNPACK=OFF && \
-  export PYTORCH_BUILD_VERSION=2.5.1 && \
+  export PYTORCH_BUILD_VERSION=2.7.1 && \
   export PYTORCH_BUILD_NUMBER=1 && \
   /usr/local/bin/python3.10 setup.py install && \
   mkdir /usr/local/gcc103/include/pytorch && \

diff --git a/dev-tools/docker/linux_aarch64_native_tester/Dockerfile b/dev-tools/docker/linux_aarch64_native_tester/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:15
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:15a
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 

diff --git a/dev-tools/docker/linux_builder/Dockerfile b/dev-tools/docker/linux_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:32
+FROM docker.elastic.co/ml-dev/ml-linux-build:32a
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 

diff --git a/dev-tools/docker/linux_dependency_builder_image/Dockerfile b/dev-tools/docker/linux_dependency_builder_image/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:32 AS builder
+FROM docker.elastic.co/ml-dev/ml-linux-build:32a AS builder
 
 # This is basically automating the setup instructions in build-setup/linux.md
 

diff --git a/dev-tools/docker/linux_image/Dockerfile b/dev-tools/docker/linux_image/Dockerfile
@@ -35,7 +35,7 @@ ARG build_dir=/usr/src
 # Build gcc 10.3
 RUN \
   cd ${build_dir} && \
-  wget --quiet -O - http://ftpmirror.gnu.org/gcc/gcc-10.3.0/gcc-10.3.0.tar.gz | tar zxf - && \
+  wget --quiet -O - https://mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-10.3.0/gcc-10.3.0.tar.gz | tar zxf - && \
   cd gcc-10.3.0 && \
   contrib/download_prerequisites && \
   sed -i -e 's/$(SHLIB_LDFLAGS)/-Wl,-z,relro -Wl,-z,now $(SHLIB_LDFLAGS)/' libgcc/config/t-slibgcc && \
@@ -154,7 +154,7 @@ gpgkey=https://yum.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS.
 # If the PyTorch branch is changed also update PYTORCH_BUILD_VERSION
 RUN \
   cd ${build_dir} && \
-  git -c advice.detachedHead=false clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+  git -c advice.detachedHead=false clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
   cd pytorch && \
   git submodule sync && \
   git submodule update --init --recursive && \
@@ -169,7 +169,7 @@ RUN \
   export USE_QNNPACK=OFF && \
   export USE_PYTORCH_QNNPACK=OFF && \
   export USE_XNNPACK=OFF && \
-  export PYTORCH_BUILD_VERSION=2.5.1 && \
+  export PYTORCH_BUILD_VERSION=2.7.1 && \
   export PYTORCH_BUILD_NUMBER=1 && \
   export MAX_JOBS=10 && \
   /usr/local/bin/python3.10 setup.py install && \

diff --git a/dev-tools/docker/linux_tester/Dockerfile b/dev-tools/docker/linux_tester/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:32
+FROM docker.elastic.co/ml-dev/ml-linux-build:32a
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 

diff --git a/dev-tools/download_macos_deps.sh b/dev-tools/download_macos_deps.sh
@@ -28,7 +28,7 @@ case `uname -m` in
         ARCHIVE=local-x86_64-apple-macosx12.0-1.tar.bz2
         ;;
     arm64)
-        ARCHIVE=local-arm64-apple-macosx11.1-12.tar.bz2
+        ARCHIVE=local-arm64-apple-macosx12.2-1.tar.bz2
         ;;
 
     *)
@@ -38,7 +38,7 @@ case `uname -m` in
 
 esac
 
-URL="https://s3-eu-west-2.amazonaws.com/ml-cpp-artifacts/dependencies/$ARCHIVE"
+URL="https://ml-cpp-artifacts.s3.eu-west-2.amazonaws.com/dependencies/$ARCHIVE"
 
 echo "Downloading dependencies from $URL"
 cd "$TMPDIR" && curl -s -S --retry 5 -O "$URL"

diff --git a/dev-tools/download_windows_deps.ps1 b/dev-tools/download_windows_deps.ps1
@@ -9,11 +9,13 @@
 # limitation.
 #
 $ErrorActionPreference="Stop"
+# TODO: Fix the windows build and use the latest archive
+# $Archive="usr-x86_64-windows-2016-16.zip"
 $Archive="usr-x86_64-windows-2016-15.zip"
 $Destination="C:\"
-# If PyTorch is not version 2.5.1 then we need the latest download
+# If PyTorch is not version 2.7.1 then we need the latest download
 if (!(Test-Path "$Destination\usr\local\include\pytorch\torch\csrc\api\include\torch\version.h") -Or
-    !(Select-String -Path "$Destination\usr\local\include\pytorch\torch\csrc\api\include\torch\version.h" -Pattern "2.5.1" -Quiet)) {
+    !(Select-String -Path "$Destination\usr\local\include\pytorch\torch\csrc\api\include\torch\version.h" -Pattern "2.7.1" -Quiet)) {
     Remove-Item "$Destination\usr" -Recurse -Force -ErrorAction Ignore
     $ZipSource="https://storage.googleapis.com/elastic-ml-public/dependencies/$Archive"
     $ZipDestination="$Env:TEMP\$Archive"

diff --git a/docs/CHANGELOG.asciidoc b/docs/CHANGELOG.asciidoc
@@ -28,6 +28,12 @@
 
 //=== Regressions
 
+== {es} version 8.19.8
+
+=== Enhancements
+
+* Update the PyTorch library to version 2.7.1. (See {ml-pull}2882[#2882].)
+
 == {es} version 8.19.0
 
 === Enhancements