Fix for "One or more background workers are no longer alive. Exiting" errors#2910
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MikeUU332 wants to merge 2 commits intoMIC-DKFZ:masterfrom
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Fix for "One or more background workers are no longer alive. Exiting" errors#2910MikeUU332 wants to merge 2 commits intoMIC-DKFZ:masterfrom
MikeUU332 wants to merge 2 commits intoMIC-DKFZ:masterfrom
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Added global mutex fix for background workers issue.
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Hello,
We encountered the "One or more background workers are no longer alive. Exiting" error as described in:
#2863
#2825
#2777
#2769
#2766
#2749
when running nnUNet on an HPC cluster. A colleague and I looked into this issue and came across this link:
joblib/threadpoolctl#176
which says that using
with threadpool_limitsis not thread safe and to use a global mutex instead.with threadpool_limitsis used in both nnUNet and batchgenerators libraries. By using a global mutex instead of with threadpool limits as done in this pull request, we no longer encounter this issue. We verified that nnUNet output is similar (they can't be identical with the non-determinative multi-threaded launcher).We encountered this error with both nnUNet and the batchgenerators library so a similar pull request will be done for batchgenerators.