Merge branch 'add_exception_handling_pdlp' of github.com:Iroy30/NvidiaCuopt into add_exception_handling_pdlp

Author: rgsl888prabhu

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,7 +11,7 @@ assignees: ''
 A clear and concise description of what the bug is.
 
 **Steps/Code to reproduce bug**
-Follow this guide http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports to craft a minimal bug report. This helps us reproduce the issue you're having and resolve the issue more quickly.
+Follow the [RAPIDS issue guidelines](https://docs.rapids.ai/contributing/issues/) (search existing issues first, then describe the problem so it can be understood and reproduced). Use the cuOpt issue template that best fits; the RAPIDS page describes general practices. Provide clear steps (and code or data) so we can reproduce the issue and resolve it more quickly.
 
 **Expected behavior**
 A clear and concise description of what you expected to happen.

.github/ISSUE_TEMPLATE/numerical_instability.md

@@ -0,0 +1,25 @@
+---
+name: "Numerical issues"
+about: "Report numerical issues (e.g., NaNs/Infs, ill-conditioning, tolerance or scaling issues)"
+title: "[NUMERICAL_ISSUES]"
+labels: "? - Needs Triage, numerical issues"
+assignees: ''
+
+---
+
+**Describe the numerical issue**
+A clear description of the numerical problem (e.g., NaN/Inf values, unexpected divergence, extreme sensitivity to small input changes).
+
+**Steps / minimal reproduction**
+Follow the [RAPIDS issue guidelines](https://docs.rapids.ai/contributing/issues/) (search existing issues first, then describe the problem so it can be understood and reproduced). Use the cuOpt issue template that best fits; the RAPIDS page describes general practices. Include inputs, API calls, and solver settings (tolerances, scaling, precision) that reproduce the behavior.
+
+**Expected vs actual behavior**
+What you expected numerically, and what you observed (including any error messages or logs).
+
+**Environment details (please complete the following information):**
+ - Environment location: [Bare-metal, Docker, Cloud (specify cloud provider)]
+ - Method of cuOpt install: [conda, Docker, or from source]
+   - If method of install is [Docker], provide `docker pull` & `docker run` commands used
+
+**Additional context**
+Add any other context (hardware, CUDA/driver versions, data scaling, problem size) that may help diagnose the issue.

.github/workflows/trigger-breaking-change-alert.yaml

@@ -15,7 +15,7 @@ jobs:
   trigger-notifier:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@release/26.04
     with:
       sender_login: ${{ github.event.sender.login }}
       sender_avatar: ${{ github.event.sender.avatar_url }}

RAPIDS_BRANCH

@@ -1 +1 @@
-main
+release/26.04

ci/test_self_hosted_service.sh

@@ -14,8 +14,18 @@ CUOPT_SERVER_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="cuopt_server_${RAPIDS_PY_CUDA_SU
 CUOPT_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="cuopt_${RAPIDS_PY_CUDA_SUFFIX}" rapids-download-wheels-from-github python)
 LIBCUOPT_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="libcuopt_${RAPIDS_PY_CUDA_SUFFIX}" rapids-download-wheels-from-github cpp)
 
-# echo to expand wildcard before adding `[extra]` requires for pip
+# generate constraints (possibly pinning to oldest support versions of dependencies)
+rapids-generate-pip-constraints test_python "${PIP_CONSTRAINT}"
+
+# notes:
+#
+#   * echo to expand wildcard before adding `[test]` requires for pip
+#   * just providing --constraint="${PIP_CONSTRAINT}" to be explicit, and because
+#     that environment variable is ignored if any other --constraint are passed via the CLI
+#
 rapids-pip-retry install \
+    --prefer-binary \
+    --constraint "${PIP_CONSTRAINT}" \
     "${CUOPT_MPS_PARSER_WHEELHOUSE}"/cuopt_mps_parser*.whl \
     "${CUOPT_WHEELHOUSE}"/cuopt*.whl \
     "${LIBCUOPT_WHEELHOUSE}"/libcuopt*.whl \

ci/test_wheel_cuopt.sh

@@ -25,8 +25,18 @@ cuopt-sh-client @ file://$(echo ${CUOPT_SH_CLIENT_WHEELHOUSE}/cuopt_sh_client-*.
 libcuopt-${RAPIDS_PY_CUDA_SUFFIX} @ file://$(echo ${LIBCUOPT_WHEELHOUSE}/libcuopt_${RAPIDS_PY_CUDA_SUFFIX}-*.whl)
 EOF
 
-# echo to expand wildcard before adding `[extra]` requires for pip
+# generate constraints (possibly pinning to oldest support versions of dependencies)
+rapids-generate-pip-constraints test_python "${PIP_CONSTRAINT}"
+
+# notes:
+#
+#   * echo to expand wildcard before adding `[test]` requires for pip
+#   * just providing --constraint="${PIP_CONSTRAINT}" to be explicit, and because
+#     that environment variable is ignored if any other --constraint are passed via the CLI
+#
 rapids-pip-retry install \
+    --prefer-binary \
+    --constraint "${PIP_CONSTRAINT}" \
     --constraint "${PIP_CONSTRAINT}" \
     "${CUOPT_MPS_PARSER_WHEELHOUSE}"/cuopt_mps_parser*.whl \
     "$(echo "${CUOPT_WHEELHOUSE}"/cuopt*.whl)[test]" \
@@ -67,4 +77,6 @@ timeout 30m ./ci/run_cuopt_pytests.sh --verbose --capture=no
 if [[ "${RAPIDS_BUILD_TYPE}" == "nightly" ]]; then
     ./ci/thirdparty-testing/run_jump_tests.sh
     ./ci/thirdparty-testing/run_cvxpy_tests.sh
+    ./ci/thirdparty-testing/run_pulp_tests.sh
+    ./ci/thirdparty-testing/run_pyomo_tests.sh
 fi

ci/test_wheel_cuopt_server.sh

@@ -15,8 +15,18 @@ CUOPT_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="cuopt_${RAPIDS_PY_CUDA_SUFFIX}" rapids-
 CUOPT_SH_CLIENT_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="cuopt_sh_client" RAPIDS_PY_WHEEL_PURE="1" rapids-download-wheels-from-github python)
 LIBCUOPT_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="libcuopt_${RAPIDS_PY_CUDA_SUFFIX}" rapids-download-wheels-from-github cpp)
 
-# echo to expand wildcard before adding `[extra]` requires for pip
+# generate constraints (possibly pinning to oldest support versions of dependencies)
+rapids-generate-pip-constraints test_python "${PIP_CONSTRAINT}"
+
+# notes:
+#
+#   * echo to expand wildcard before adding `[test]` requires for pip
+#   * just providing --constraint="${PIP_CONSTRAINT}" to be explicit, and because
+#     that environment variable is ignored if any other --constraint are passed via the CLI
+#
 rapids-pip-retry install \
+    --prefer-binary \
+    --constraint "${PIP_CONSTRAINT}" \
     "${CUOPT_MPS_PARSER_WHEELHOUSE}"/cuopt_mps_parser*.whl \
     "$(echo "${CUOPT_SERVER_WHEELHOUSE}"/cuopt_server*.whl)[test]" \
     "${CUOPT_WHEELHOUSE}"/cuopt*.whl \

ci/thirdparty-testing/run_pulp_tests.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -e -u -o pipefail
+
+rapids-logger "building 'pulp' from source and running cuOpt tests"
+
+if [ -z "${PIP_CONSTRAINT:-}" ]; then
+    rapids-logger "PIP_CONSTRAINT is not set; ensure ci/test_wheel_cuopt.sh (or equivalent) has set it so cuopt wheels are used."
+    exit 1
+fi
+
+git clone --depth 1 https://github.com/coin-or/pulp.git
+pushd ./pulp || exit 1
+
+# Install PuLP in editable form so it uses the environment's cuopt (from PIP_CONSTRAINT)
+python -m pip install \
+    --constraint "${PIP_CONSTRAINT}" \
+    --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple \
+    pytest \
+    -e .
+
+pip check
+
+rapids-logger "running PuLP tests (cuOpt-related)"
+# PuLP uses pytest; run only tests that reference cuopt/CUOPT
+# Exit code 5 = no tests collected; then try run_tests.py which detects solvers (including cuopt)
+pytest_rc=0
+timeout 5m python -m pytest \
+    --verbose \
+    --capture=no \
+    -k "cuopt or CUOPT" \
+    pulp/tests/ || pytest_rc=$?
+
+if [ "$pytest_rc" -eq 5 ]; then
+    rapids-logger "No pytest -k cuopt tests found; running PuLP run_tests.py (solver auto-detection, includes cuopt)"
+    timeout 5m python pulp/tests/run_tests.py
+    pytest_rc=$?
+fi
+
+popd || exit 1
+exit "$pytest_rc"

ci/thirdparty-testing/run_pyomo_tests.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+# SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -e -u -o pipefail
+
+rapids-logger "building 'pyomo' from source and running cuOpt tests"
+
+if [ -z "${PIP_CONSTRAINT:-}" ]; then
+    rapids-logger "PIP_CONSTRAINT is not set; ensure ci/test_wheel_cuopt.sh (or equivalent) has set it so cuopt wheels are used."
+    exit 1
+fi
+
+git clone --depth 1 https://github.com/Pyomo/pyomo.git
+pushd ./pyomo || exit 1
+
+# Install Pyomo in editable form so it uses the environment's cuopt (from PIP_CONSTRAINT)
+python -m pip install \
+    --constraint "${PIP_CONSTRAINT}" \
+    --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple \
+    pytest \
+    -e .
+
+pip check
+
+rapids-logger "running Pyomo tests (cuopt_direct / cuOpt-related)"
+# Run only tests that reference cuopt (cuopt_direct solver)
+timeout 5m python -m pytest \
+    --verbose \
+    --capture=no \
+    -k "cuopt or CUOPT" \
+    pyomo/solvers/tests/
+
+popd || exit 1

cpp/CMakeLists.txt

@@ -109,8 +109,12 @@ if(BUILD_MSAN)
   add_link_options(-fsanitize=memory)
 endif(BUILD_MSAN)
 
+# Note: -UNDEBUG is applied via CUOPT_CXX_FLAGS / CUOPT_CUDA_FLAGS (not add_definitions)
+# to avoid leaking into dependencies that are built in-tree.
 if(DEFINE_ASSERT)
   add_definitions(-DASSERT_MODE)
+  list(APPEND CUOPT_CXX_FLAGS -UNDEBUG)
+  list(APPEND CUOPT_CUDA_FLAGS -UNDEBUG)
 endif(DEFINE_ASSERT)
 
 if(DEFINE_BENCHMARK)
@@ -184,13 +188,6 @@ elseif(CMAKE_CUDA_LINEINFO)
   set(CMAKE_CUDA_FLAGS_RELEASE "${CMAKE_CUDA_FLAGS_RELEASE} -lineinfo")
 endif(CMAKE_BUILD_TYPE MATCHES Debug)
 
-# Undefine NDEBUG if assert mode is on
-if(DEFINE_ASSERT)
-  message(STATUS "Undefining NDEBUG with assert mode enabled")
-  add_definitions(-UNDEBUG)
-endif()
-
-
 # ##################################################################################################
 # - find CPM based dependencies  ------------------------------------------------------------------
 rapids_cpm_init()