Linux: ConnectionError: Timeout while waiting for backend to be ready.

[harikrushna171]

When i am launching the geometry service in Linux.

I am getting following error.

Error "
CRITICAL - - logger - handle_exception - Uncaught exception
Traceback (most recent call last):
File "xx/PyANSYS/Test_Geo.py", line 2, in
modeler = launch_modeler_with_core_service(version=252)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "xx/.local/lib/python3.11/site-packages/ansys/geometry/core/misc/checks.py", line 561, in wrapper
return method(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^
File "xx/.local/lib/python3.11/site-packages/ansys/geometry/core/connection/launcher.py", line 1073, in launch_modeler_with_core_service
return prepare_and_start_backend(
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "xx/.local/lib/python3.11/site-packages/ansys/geometry/core/connection/product_instance.py", line 554, in prepare_and_start_backend
_wait_for_backend(host, port, timeout, transport_values)
File "xx/.local/lib/python3.11/site-packages/ansys/geometry/core/connection/product_instance.py", line 624, in _wait_for_backend
raise ConnectionError("Timeout while waiting for backend to be ready.")
ConnectionError: Timeout while waiting for backend to be ready."

[RobPasMue]

Hi @harikrushna171 !

Could you attempt to extract the logs from the server for a failed execution? If you are not aware of the default location, you can simply specify a folder for it as follows:

modeler = launch_modeler_with_core_service(version=252, server_log_level=0, server_logs_folder="/path/to/your/folder")

server_log_level=0 will also force the logs to be as verbose as possible.

Side questions:

• Do you have a license server configured under the environment variables ANSRV_GEO_LICENSE_SERVER, LICENSE_SERVER, or ANSYSLMD_LICENSE_FILE?
• Do you have the Ansys install for Core Service 252 under one of the following folders in your machine? /usr/ansys_inc, /ansys_inc, or /install/ansys_inc?
• If the previous answer is no, do you define the location of your Core Service under the environment variable ANSYS_GEOMETRY_SERVICE_ROOT?

[harikrushna171]

after adding, "launch_modeler_with_core_service(..., transport_mode="insecure"), everything is working fine now. 

Thank you so much @RobPasMue

[RobPasMue]

As a summary (and coming from an offline conversation with @harikrushna171) . I am leaving here the rationale:

---

I think this part might be relevant for any of you hitting this issue: Securing connections

With the latest PyAnsys Geometry and Ansys SPs (for 24R2, 25R1 and 25R2) there is a breaking change. Consider the following scenarios:

1. If you are using the latest version of PyAnsys Geometry (+0.14) and the latest SPs, everything should be working fine by default when launching a local Core Service.

2. If you are not using the latest SPs but you are using the latest version of PyAnsys Geometry, you will need to adapt your launcher method as follows:

    launch_modeler_with_core_service(..., transport_mode="insecure")

You can also do this same test (i.e. previous command) even if you are using the latest versions of the SP and the PyAnsys library, but you still want to try an insecure connection.

3. If you are using the latest SPs but you are using an old version of PyAnsys Geometry you will need to upgrade to the latest version of PyAnsys Geometry.

[RobPasMue]

@harikrushna171 - if you agree with the statement, could you mark my previous response as an answer? That will help other users benefit from a similar issue