Example cannot work

[cathaysia]

Is there an already existing issue for this?

• I have searched the existing issues

Expected behavior

DDSHelloWorldExample cannot work.

Current behavior

after v2.13.0, the examples cannot work. DDSHelloWorldExample cannot work.

Steps to reproduce

cmake -B build -GNinja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH="~/FastDDS/install;~/FastDDS/foonathan_memory_vendor/build/foo_mem_ext_prj_install" -DEPROSIMA_BUILD=ON -DSQLITE3_SUPPORT=OFF -DSHM_TRANSPORT_DEFAULT=OFF -DCOMPILE_TOOLS=OFF -DCMAKE_TOOLCHAIN_FILE=$HOME/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DSECURITY=OFF -DCOMPILE_EXAMPLES=ON -DSHM_TRANSPORT_DEFAULT=OFF
cmake --build build
# run DDSHelloWorldExample

Fast DDS version/commit

v2.14.3

Platform/Architecture

Other. Please specify in Additional context section.

Transport layer

UDPv4

Additional context

macos 14.6

XML configuration file

No response

Relevant log output

No response

Network traffic capture

No response

[cathaysia]

I have not do a git bitsect, only know 2.13.0 can work.

[JesusPoderoso]

Hi @cathaysia, thanks for using Fast DDS.
We would need more information on the context, tracebacks or logging info.
The currently supported MacOS platform is Mojave 10.14, with CLang 15 compiler (which builds the example successfully).
For that reason, I am moving this ticket to the support section according to the Fast DDS CONTRIBUTING guidelines.

[conroy-cheers]

Just ran a bisect on this; the culprit is 7832901

Fast-DDS/src/cpp/utils/threading/threading_osx.ipp

Lines 136 to 143 in 7832901

	result =
	thread_policy_set(pthread_mach_thread_np(self_tid), THREAD_AFFINITY_POLICY, (thread_policy_t)&policy,
	1);
	if (0 != result)
	{
	EPROSIMA_LOG_ERROR(SYSTEM, "Problem to set affinity of thread with id [" << self_tid << "," << thread_name << "] to value " << affinity << ". Error '" << strerror(
	result) << "'");
	}

Commenting out the above EPROSIMA_LOG_ERROR call makes the pub/sub example work again. I added some extra checks and it appears setting the thread affinity fails both before and after the problem commit (macOS 15.1 Sequoia) - perhaps trying to log at that point is causing something to get stuck?

As a crappy workaround, setting the LOG_NO_ERROR CMake flag seems to get things working again.