Jacob Marcil
02/07/2024, 4:16 PMScout
02/07/2024, 4:16 PMJacob Marcil
02/07/2024, 4:18 PMScout
02/07/2024, 4:19 PMDynamicOutput
within a graph, the failure of a dynamic step (i.e., an op that yields DynamicOutput
) will typically cause the execution of the graph to fail. This is because dynamic outputs are often used to represent a variable number of outputs from an op, which may then be consumed by downstream ops. If a dynamic step fails, the downstream ops that depend on its outputs will not have the data they need to execute. However, if you want to continue executing the rest of the graph even if a DynamicOutput
fails, you would need to implement custom error handling within your ops. Here's a general approach you could take: 1. Error Handling in Ops: Within the op that yields DynamicOutput
, you can catch exceptions and instead yield a special DynamicOutput
that indicates a failure. Downstream ops would need to be designed to handle these special failure-indicating outputs appropriately. 2. Branching Logic: Implement branching logic within your graph to handle the success or failure paths differently. This could involve checking for the presence of failure-indicating outputs and conditionally executing different branches of your graph. 3. Custom IO Managers: Use custom IO managers that can handle exceptions during the storage and retrieval of dynamic outputs. This way, even if an error occurs during the processing of a dynamic output, the IO manager can ensure that the rest of the graph continues to execute. It's important to note that these approaches require careful design to ensure that your graph's semantics are correct and that downstream ops can handle the absence or special handling of failed dynamic outputs. The documentation does not provide a direct example of a graph asset that continues to the end of the graph if a DynamicOutput
fails. For more specific guidance on handling dynamic outputs and implementing error handling within your ops, you should refer to the [Op retries documentation](https://docs.dagster.io/concepts/ops-jobs-graphs/op-retries) and the [Dynamic Output documentation](https://docs.dagster.io/concepts/solids-pipelines/dynamic-computation) provided by Dagster.