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Chris Lu
9b1ff91949
* filer: stream offloaded metadata-log entries instead of buffering whole files The client metadata-chunks read path (ReadLogFileRefs, used by the meta aggregator to consume peer filers and by mounts) decoded every entry of a log file into a slice before handing it to the consumer, and prefetched the next whole file the same way. Peak memory scaled with log-file size: under heavy concurrent writes the per-event chunk lists grow and minute-files reach hundreds of MB to GBs, so a filer aggregating a few peers held many GBs of decoded entries at once (heap dominated by readLogFileEntries -> consumeBytesNoZero) and OOMed. Stream entries through a bounded channel: a producer decodes one entry at a time and the next file's read overlaps processing via the channel buffer, so peak memory is bounded by the channel depth rather than O(file size). In a synthetic replay peak live heap dropped from ~1.3x the file size to a flat few MB regardless of file size. * filer: tighten offload replay tests Share one ordered-replay assertion between the merge-order and single-filer tests, assert the callback's own error is what propagates, and drop atomic counters from callbacks that run on a single goroutine. * filer: abort offloaded log replay promptly instead of joining wedged readers Collapse the single-filer fast path into the merged reader: it was a second copy of the producer/stop lifecycle with its own subtler synchronization, and a one-stream merge does the same job. On abort (processing error or a fatal read error from one filer), the consumer used to drain channels and join every producer. A producer blocked in an uncancellable chunk read cannot observe stop until that read returns, so an abort could stall the caller's retry loop behind a dead volume-server connection. Closing stop is now the only cleanup: producers check it at every send and file boundary and exit on their own, and the merge loop's blocking receives also escape on stop. Producers also check stop before opening each file, so an aborted replay no longer keeps reading remaining files whose entries never reach the channel. A mid-file chunk-not-found still skips to the next file, but the log line now reports how many entries were delivered first instead of pretending the whole file was skipped; the redundant error log before setFatal is gone since the error propagates to callers that already log it. * filer: cap offloaded log entry allocation against corrupt size prefix A garbage 4-byte size prefix (torn chunk or stream desync) drove make([]byte, size) up to 4GiB per entry. Reject sizes above the same 1GiB bound the filer-side log readers enforce.