mirror of https://github.com/pulumi/pulumi.git
1a16857a44
Before these changes, the step generator was not capable of running concurrently due to the use of shared state. These changes enable concurrent step generation by protecting shared state with locks where necessary. By far the most subtle changes are those required for the safe concurrent evaluation of delete-before-replace graphs. Because step generation is stateful, it is not safe for two processes to concurrently evaluate steps for the same resource. To prevent this situation, each resource is locked before its steps are planned and unlocked after its steps are planned. During the evaluation of a DBR graph, all resources that _might_ be deleted are locked prior to evaluation and unlocked once evaluation has completed. Fixes #3302. |
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