Try to fix experiment already exist issue in MLFlowHandler

[KumoLiu]

Try to fixes NVIDIA/NVFlare#2698.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[binliunls]

I think one more thing to discuss is whether MONAI should handle the multiprocessing scene of the mlflow handler or users should implement it in their code. If we'd like to do this, we'd better to use a more formal way like a lock for this.

Thanks
Bin

[KumoLiu]

I think one more thing to discuss is whether MONAI should handle the multiprocessing scene of the mlflow handler or users should implement it in their code. If we'd like to do this, we'd better to use a more formal way like a lock for this.

A good point. I didn't find a multiprocessing scene, the issue here is that in the nvflare real world tests, it will raise an error during creating experiments in different sites. Perhaps we can add try-catch block here and if there is a real-world case, we can refactor the logic. What do you think? Thanks.

[binliunls]

I think one more thing to discuss is whether MONAI should handle the multiprocessing scene of the mlflow handler or users should implement it in their code. If we'd like to do this, we'd better to use a more formal way like a lock for this.

A good point. I didn't find a multiprocessing scene, the issue here is that in the nvflare real world tests, it will raise an error during creating experiments in different sites. Perhaps we can add try-catch block here and if there is a real-world case, we can refactor the logic. What do you think? Thanks.

Sure, we can leave this one as it is. But I think from the flare side, they need to handle this multiprocessing issue.

[KumoLiu]

/build

[KumoLiu]

/build

[KumoLiu]

/build

[KumoLiu]

/build

[Nic-Ma]

/build

[KumoLiu]

/build

[YanxuanLiu]

/build

[KumoLiu]

/build