core, graph, store: Pause failed subgraphs instead of unassigning#5971
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core, graph, store: Pause failed subgraphs instead of unassigning#5971
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incrypto32
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May 1, 2025
Unassigning subgraphs has a number of unwanted side-effects, e.g., canceling copies. Pausing is safer alternative to avoid spending cycles on a subgraph we know will not make progress.
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After this was merged graphprotocol#5160 substreams fatal errors can write SubgraphError{ block_ptr: None }. This introduces a bug that shows in Status API as those records can surface as fatalError.block = null violating the schema of type Block { hash: Bytes! number: BigInt! } A later commit graphprotocol#5971 makes it much easier to trigger this when doing a status API that returns all subgraphs (empty [] array for deployment ID) as failed substreams linger on in the indexing status set as paused instead of being unassigned.
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Unassigning subgraphs has a number of unwanted side-effects, e.g., canceling copies. Pausing is safer alternative to avoid spending cycles on a subgraph we know will not make progress.