Fix #10842 - When using pyenergyplus to run (via run_energyplus), PythonPlugin initializations errors lead to hang

src/EnergyPlus/CMakeLists.txt

@@ -1147,6 +1147,17 @@ if(BUILD_TESTING)
       COMMAND  energyplus -D -d "${CLI_TEST_DIR}/PythonPlugin.FromOutside/out-${NON_ASCII_DIRNAME}" ${NON_ASCII_DIRNAME}/${TEST_CASE}.idf
       WORKING_DIRECTORY  "${CLI_TEST_DIR}"
     )
+
+    set(TEST_DIR "${PROJECT_BINARY_DIR}/tst/api/TestRuntimeReleasesTheGIL")
+    file(MAKE_DIRECTORY ${TEST_DIR})
+    add_test(NAME "API.Runtime.PythonPlugin.TestRuntimeReleasesTheGIL"
+      COMMAND "${Python_EXECUTABLE}" "${PROJECT_SOURCE_DIR}/tst/EnergyPlus/api/TestRuntimeReleasesTheGIL.py" -d "${TEST_DIR}" -w "${EPW_FILE}" -D "${PROJECT_SOURCE_DIR}/tst/EnergyPlus/api/TestRuntimeReleasesTheGIL/mcve_gil.idf"
+    )
+    set_tests_properties("API.Runtime.PythonPlugin.TestRuntimeReleasesTheGIL"
+      PROPERTIES
+        ENVIRONMENT PYTHONPATH=${DIR_WITH_PY_ENERGYPLUS}
+        TIMEOUT 10  # This used to timeout! and we expect it NOT to
+    )
   endif()
 endif()
 

src/EnergyPlus/PluginManager.cc

@@ -484,8 +484,23 @@ PluginManager::PluginManager(EnergyPlusData &state) : eplusRunningViaPythonAPI(s
 
     initPython(state, pathToPythonPackages);
 
-    // Take control of the global interpreter lock while we are here, make sure to release it...
-    PyGILState_STATE gil = PyGILState_Ensure();
+    // GilGrabber is an RAII helper that will ensure we release the GIL (including if we end up throwing)
+    struct GilGrabber
+    {
+        GilGrabber()
+        {
+            gil = PyGILState_Ensure();
+        }
+        ~GilGrabber()
+        {
+            PyGILState_Release(gil);
+        }
+
+        PyGILState_STATE gil;
+    };
+
+    // Take control of the global interpreter lock
+    GilGrabber gil_grabber;
 
     // call this once to allow us to add to, and report, sys.path later as needed
     PyRun_SimpleString("import sys"); // allows us to report sys.path later
@@ -679,8 +694,8 @@ PluginManager::PluginManager(EnergyPlusData &state) : eplusRunningViaPythonAPI(s
         }
     }
 
-    // Release the global interpreter lock
-    PyGILState_Release(gil);
+    // Release the global interpreter lock is done via RAII
+
     // setting up output variables deferred until later in the simulation setup process
 #else
     // need to alert only if a plugin instance is found

tst/EnergyPlus/api/TestRuntimeReleasesTheGIL.py

@@ -0,0 +1,66 @@
+# EnergyPlus, Copyright (c) 1996-2024, The Board of Trustees of the University
+# of Illinois, The Regents of the University of California, through Lawrence
+# Berkeley National Laboratory (subject to receipt of any required approvals
+# from the U.S. Dept. of Energy), Oak Ridge National Laboratory, managed by UT-
+# Battelle, Alliance for Sustainable Energy, LLC, and other contributors. All
+# rights reserved.
+#
+# NOTICE: This Software was developed under funding from the U.S. Department of
+# Energy and the U.S. Government consequently retains certain rights. As such,
+# the U.S. Government has been granted for itself and others acting on its
+# behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
+# Software to reproduce, distribute copies to the public, prepare derivative
+# works, and perform publicly and display publicly, and to permit others to do
+# so.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# (1) Redistributions of source code must retain the above copyright notice,
+#     this list of conditions and the following disclaimer.
+#
+# (2) Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions and the following disclaimer in the documentation
+#     and/or other materials provided with the distribution.
+#
+# (3) Neither the name of the University of California, Lawrence Berkeley
+#     National Laboratory, the University of Illinois, U.S. Dept. of Energy nor
+#     the names of its contributors may be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+#
+# (4) Use of EnergyPlus(TM) Name. If Licensee (i) distributes the software in
+#     stand-alone form without changes from the version obtained under this
+#     License, or (ii) Licensee makes a reference solely to the software
+#     portion of its product, Licensee must refer to the software as
+#     "EnergyPlus version X" software, where "X" is the version number Licensee
+#     obtained under this License and may not use a different name for the
+#     software. Except as specifically required in this Section (4), Licensee
+#     shall not use in a company name, a product name, in advertising,
+#     publicity, or other promotional activities any name, trade name,
+#     trademark, logo, or other designation of "EnergyPlus", "E+", "e+" or
+#     confusingly similar designation, without the U.S. Department of Energy's
+#     prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+import sys
+
+from pyenergyplus.api import EnergyPlusAPI
+
+api = EnergyPlusAPI()
+state = api.state_manager.new_state()
+exit_code = api.runtime.run_energyplus(state, sys.argv[1:])
+
+if exit_code == 0:
+    print("Expected EnergyPlus to return an error to the broken python plugin. Task Succeeded Unsuccessfully!")
+    sys.exit(1)

tst/EnergyPlus/api/TestRuntimeReleasesTheGIL/mcve_gil.idf

@@ -0,0 +1,102 @@
+! The PythonPlugin referenced here has a broken import
+! This is a test for #10842
+
+  Timestep,6;
+
+  SimulationControl,
+    No,                     !- Do Zone Sizing Calculation
+    No,                     !- Do System Sizing Calculation
+    No,                     !- Do Plant Sizing Calculation
+    Yes,                     !- Run Simulation for Sizing Periods
+    No,                      !- Run Simulation for Weather File Run Periods
+    No,                      !- Do HVAC Sizing Simulation for Sizing Periods
+    1;                       !- Maximum Number of HVAC Sizing Simulation Passes
+
+  GlobalGeometryRules,
+    UpperLeftCorner,         !- Starting Vertex Position
+    Counterclockwise,        !- Vertex Entry Direction
+    Relative,                !- Coordinate System
+    Relative;                !- Daylighting Reference Point Coordinate System
+
+  Building,
+    Building,                !- Name
+    0.0000,                  !- North Axis {deg}
+    City,                    !- Terrain
+    0.0400,                  !- Loads Convergence Tolerance Value {W}
+    0.2000,                  !- Temperature Convergence Tolerance Value {deltaC}
+    FullInteriorAndExterior, !- Solar Distribution
+    25,                      !- Maximum Number of Warmup Days
+    6;                       !- Minimum Number of Warmup Days
+
+  Site:Location,
+    CHICAGO_IL_USA TMY2-94846,  !- Name
+    41.78000,                !- Latitude {deg}
+    -87.75000,               !- Longitude {deg}
+    -6.000000,               !- Time Zone {hr}
+    190.0000;                !- Elevation {m}
+
+! CHICAGO_IL_USA Annual Heating 99.6%, MaxDB=-20.6°C
+
+  SizingPeriod:DesignDay,
+    CHICAGO Ann Htg 99.6% Condns DB,  !- Name
+    1,                       !- Month
+    21,                      !- Day of Month
+    WinterDesignDay,         !- Day Type
+    -20.6,                   !- Maximum Dry-Bulb Temperature {C}
+    0.0,                     !- Daily Dry-Bulb Temperature Range {deltaC}
+    ,                        !- Dry-Bulb Temperature Range Modifier Type
+    ,                        !- Dry-Bulb Temperature Range Modifier Day Schedule Name
+    Wetbulb,                 !- Humidity Condition Type
+    -20.6,                   !- Wetbulb or DewPoint at Maximum Dry-Bulb {C}
+    ,                        !- Humidity Condition Day Schedule Name
+    ,                        !- Humidity Ratio at Maximum Dry-Bulb {kgWater/kgDryAir}
+    ,                        !- Enthalpy at Maximum Dry-Bulb {J/kg}
+    ,                        !- Daily Wet-Bulb Temperature Range {deltaC}
+    99063.,                  !- Barometric Pressure {Pa}
+    4.9,                     !- Wind Speed {m/s}
+    270,                     !- Wind Direction {deg}
+    No,                      !- Rain Indicator
+    No,                      !- Snow Indicator
+    No,                      !- Daylight Saving Time Indicator
+    ASHRAEClearSky,          !- Solar Model Indicator
+    ,                        !- Beam Solar Day Schedule Name
+    ,                        !- Diffuse Solar Day Schedule Name
+    ,                        !- ASHRAE Clear Sky Optical Depth for Beam Irradiance (taub) {dimensionless}
+    ,                        !- ASHRAE Clear Sky Optical Depth for Diffuse Irradiance (taud) {dimensionless}
+    0.00;                    !- Sky Clearness
+
+! CHICAGO_IL_USA Annual Cooling (DB=>MWB) .4%, MaxDB=33.2°C MWB=23.8°C
+
+  SizingPeriod:DesignDay,
+    CHICAGO Ann Clg .4% Condns DB=>MWB,  !- Name
+    7,                       !- Month
+    21,                      !- Day of Month
+    SummerDesignDay,         !- Day Type
+    33.2,                    !- Maximum Dry-Bulb Temperature {C}
+    10.7,                    !- Daily Dry-Bulb Temperature Range {deltaC}
+    ,                        !- Dry-Bulb Temperature Range Modifier Type
+    ,                        !- Dry-Bulb Temperature Range Modifier Day Schedule Name
+    Wetbulb,                 !- Humidity Condition Type
+    23.8,                    !- Wetbulb or DewPoint at Maximum Dry-Bulb {C}
+    ,                        !- Humidity Condition Day Schedule Name
+    ,                        !- Humidity Ratio at Maximum Dry-Bulb {kgWater/kgDryAir}
+    ,                        !- Enthalpy at Maximum Dry-Bulb {J/kg}
+    ,                        !- Daily Wet-Bulb Temperature Range {deltaC}
+    99063.,                  !- Barometric Pressure {Pa}
+    5.3,                     !- Wind Speed {m/s}
+    230,                     !- Wind Direction {deg}
+    No,                      !- Rain Indicator
+    No,                      !- Snow Indicator
+    No,                      !- Daylight Saving Time Indicator
+    ASHRAEClearSky,          !- Solar Model Indicator
+    ,                        !- Beam Solar Day Schedule Name
+    ,                        !- Diffuse Solar Day Schedule Name
+    ,                        !- ASHRAE Clear Sky Optical Depth for Beam Irradiance (taub) {dimensionless}
+    ,                        !- ASHRAE Clear Sky Optical Depth for Diffuse Irradiance (taud) {dimensionless}
+    1.00;                    !- Sky Clearness
+
+  PythonPlugin:Instance,
+    Heating Setpoint Override,  !- Name
+    Yes,                     !- Run During Warmup Days
+    mcve_gil,                !- Python Module Name
+    HeatingSetPoint;         !- Plugin Class Name

tst/EnergyPlus/api/TestRuntimeReleasesTheGIL/mcve_gil.py

@@ -0,0 +1,56 @@
+# EnergyPlus, Copyright (c) 1996-2024, The Board of Trustees of the University
+# of Illinois, The Regents of the University of California, through Lawrence
+# Berkeley National Laboratory (subject to receipt of any required approvals
+# from the U.S. Dept. of Energy), Oak Ridge National Laboratory, managed by UT-
+# Battelle, Alliance for Sustainable Energy, LLC, and other contributors. All
+# rights reserved.
+#
+# NOTICE: This Software was developed under funding from the U.S. Department of
+# Energy and the U.S. Government consequently retains certain rights. As such,
+# the U.S. Government has been granted for itself and others acting on its
+# behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
+# Software to reproduce, distribute copies to the public, prepare derivative
+# works, and perform publicly and display publicly, and to permit others to do
+# so.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# (1) Redistributions of source code must retain the above copyright notice,
+#     this list of conditions and the following disclaimer.
+#
+# (2) Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions and the following disclaimer in the documentation
+#     and/or other materials provided with the distribution.
+#
+# (3) Neither the name of the University of California, Lawrence Berkeley
+#     National Laboratory, the University of Illinois, U.S. Dept. of Energy nor
+#     the names of its contributors may be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+#
+# (4) Use of EnergyPlus(TM) Name. If Licensee (i) distributes the software in
+#     stand-alone form without changes from the version obtained under this
+#     License, or (ii) Licensee makes a reference solely to the software
+#     portion of its product, Licensee must refer to the software as
+#     "EnergyPlus version X" software, where "X" is the version number Licensee
+#     obtained under this License and may not use a different name for the
+#     software. Except as specifically required in this Section (4), Licensee
+#     shall not use in a company name, a product name, in advertising,
+#     publicity, or other promotional activities any name, trade name,
+#     trademark, logo, or other designation of "EnergyPlus", "E+", "e+" or
+#     confusingly similar designation, without the U.S. Department of Energy's
+#     prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+from this_does_not_exist.hello_world import garbage