Aliaksandr Valialkin 12cd32fd75 lib/protoparser/promremotewrite: fall back to Snappy decoding if zstd decoding fails ... This case is possible after the following steps: 1. vmagent tries to perform handshake with the -remoteWrite.url in order to determine whether the remote storage supports zstd-compressed data. 2. The remote storage is unavailable during the handshake. In this case vmagent falls back to Snappy compression for the data sent to the remote storage. 3. vmagent compresses the collected data into blocks with Snappy and puts these blocks to persistent queue on disk. 4. The remote storage becomes available. 5. vmagent restarts, performs the handshake with the remote storage and detects that it supports zstd-compressed data. 6. vmagent starts sending Snappy-compressed data from persistent queue to the remote storage, while falsely advertizing it sends zstd-compressed data. 7. The remote storage receives Snappy-compressed data and fails unpacking it with zstd. The solution is to just fall back to Snappy decompression if zstd decompression fails. Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5301		2023-11-13 21:25:39 +01:00
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streamparser.go	lib/protoparser/promremotewrite: fall back to Snappy decoding if zstd decoding fails	2023-11-13 21:25:39 +01:00