Raise open file descriptors limit to avoid problem with pystack#40110
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peterfpeterson merged 1 commit intoOct 14, 2025
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…idproject#40108) ### Description of work The recent problems with running `pystack` in the error reporter have been traced back to the fact that `pystack` was trying to open more file descriptors than the limit set on most linux systems. A pr into `pystack` has been made to improve their error messages (bloomberg/pystack#260). When this is a problem, you get a lot of this kind of output ``` ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../.././libMantidJson.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../.././libMantidJson.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../.././libMantidJson.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../.././libMantidJson.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidTypes.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidTypes.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidTypes.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidTypes.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidPythonInterfaceCore.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidPythonInterfaceCore.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidPythonInterfaceCore.so ERROR(process_core): Cannot open ELF file /home/bya67386/mambaforge/envs/test_htlp_links/lib/python3.11/site-packages/mantid/kernel/../../../../libMantidPythonInterfaceCore. ``` The issue started after the first new instrument view pr went in (this commit mantidproject@8733e98#diff-4a6d6571d2c59705d8a673667672de2d7dcc3c756c61a3f0195acdefac52fe34). We're not that sure why, but it could be the addition of new libraries such as `pyvista`. This pr raises the limit (equivalent to `ulimit -n <value>`) for the outer mantid process, which may eventually launch the error reporter. ### To test: Package to test is at `mamba install jhaigh0/label/raise_open_files_limit::mantidworkbench` It would be good to test on idaaas where the core dump location is already set up. Run Segfault and check that the pystack output has been captured in the stacktrace field.
peterfpeterson
merged commit 85d167d
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mantidproject:ornl-next
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This is a version of #40108 into
ornl-next