tillrohrmann commented on issue #8242: [FLINK-6227][network] Introduce the DataConsumptionException for downstream task failure URL: https://github.com/apache/flink/pull/8242#issuecomment-490484996 > Catch parent IOException instead of PartitionNotFoundException in LocalInputChannel or PartitionRequestServerHandler during requesting partition. IOException could only happen in blocking result partition during opening disk file which might indicate the file corrupted/deleted. So the above cases of b, c are unified in this process. But there might exist concerns here: I'm not 100% sure whether we should always transform an `IOException` into a `PartitionNotFoundException` or whether we should on the producer side check whether the file still exists and if not throw an `PartitionNotFoundException` from there. A part from that, your proposed changes sound good to me. Please also open a JIRA issue for the missing parts (throwing a `PartitionNotFoundException` if the consumer cannot establish a connection to the remote TM).
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