fix: (migrated PR 4094): fix socket.gethostbyaddr(ip) error when no reverse DNS available.

[pyansys-ci-bot]

This PR is a mirror pull request created from Fix socket.gethostbyaddr(ip) error when no reverse DNS available. to allow the code to access PyMAPDL CICD secrets.

Check the original PR made by @yeguang-xue for more details.

Closes #4094

Original pull request

Fix socket.gethostbyaddr(ip) error when no reverse DNS available.

Description

For ip addresses without reverse DNS, socket.gethostbyaddr(ip) will fail. We can simply use ip address for hostname display.

Issue linked

Please mention the issue number or describe the problem this pull request addresses.

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

Summary by Sourcery

Bug Fixes:

• Fallback to using the raw IP for hostname instead of calling gethostbyaddr for non-DNS-resolvable addresses

[sourcery-ai]

Reviewer's Guide

Hostname resolution logic updated to use the raw IP for non-local addresses, removing the reverse DNS lookup call to prevent socket.gethostbyaddr failures.

Class diagram for updated hostname resolution logic

classDiagram
    class MapdlGrpc {
        - _hostname
        __init__(ip)
    }
    %% Before: _hostname set via socket.gethostbyaddr(ip) for non-local IPs
    %% After: _hostname set to ip directly for non-local IPs (no reverse DNS lookup)

Loading

File-Level Changes

Change	Details	Files
Avoid reverse DNS lookup failures by using IP as hostname fallback	Removed socket.gethostbyaddr call for non-local IPs Retained explicit mapping of loopback addresses to “localhost” Assigned raw IP string as hostname when no DNS available	src/ansys/mapdl/core/mapdl_grpc.py

Assessment against linked issues

Issue	Objective	Addressed	Explanation

---

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[ansys-reviewer-bot]

Thanks for opening a Pull Request. If you want to perform a review write a comment saying:

@ansys-reviewer-bot review

[germa89]

@yeguang-xue I took advantage of your PR to do a small refactoring. I hope you dont mind.

Good job!

[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.

Project coverage is 91.80%. Comparing base (a9d37dc) to head (f99fd82).
Report is 3 commits behind head on main.

❌ Your patch status has failed because the patch coverage (84.61%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4095      +/-   ##
==========================================
- Coverage   91.82%   91.80%   -0.03%     
==========================================
  Files         187      187              
  Lines       15033    15041       +8     
==========================================
+ Hits        13804    13808       +4     
- Misses       1229     1233       +4     

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[germa89]

I do not care about coverage for this case.

@pyansys-ci-bot LGTM.

[germa89]

LGTM.