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Chris Lu
cda43f1976
* filer: do not 404 a TUS session on a transient chunk-load failure readTusSessionInfo already proved the session exists before loadTusSessionChunks is called, so a failure there is a read failure, not evidence the session is gone: a volume-server timeout or a canceled request context surfaces through ListDirectoryEntries the same way a missing session would. Every such error was mapped to writeTusSessionNotFound, answering 404 to HEAD/PATCH and 204 to DELETE. A spec-compliant TUS client trusts that and discards the session, orphaning every chunk it had committed until the 24h expiry sweep, or forever if it never issues a DELETE. Only an error matching filer_pb.ErrNotFound is now reported as not found; anything else answers 500 so the client retries against the same session instead of abandoning it. * test: cover a TUS session's transient chunk-load failure Adds a listErr hook to the in-memory test store, alongside the existing commitErr/deleteErr, to simulate a store or RPC failure from ListDirectoryEntries. HEAD, PATCH and DELETE against a live session all answer with a server error instead of a not-found status when the chunk listing fails transiently, and the session is left on disk untouched. A listing failure that genuinely means not found, filer_pb.ErrNotFound, still answers 404 (204 for DELETE).