[3.5] Restrict the max size of each WAL entry to the remaining size of the WAL file #14127
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The FileReader interface is the wrapper of io.Reader. It provides the fs.FileInfo as well. The FileBufReader struct is the wrapper of bufio.Reader, it also provides fs.FileInfo. Signed-off-by: Benjamin Wang <wachao@vmware.com>
…file Currently the max size of each WAL entry is hard coded as 10MB. If users set a value > 10MB for the flag --max-request-bytes, then etcd may run into a situation that it successfully processes a big request, but fails to decode it when replaying the WAL file on startup. On the other hand, we can't just remove the limitation, because if a WAL entry is somehow corrupted, and its recByte is a huge value, then etcd may run out of memory. So the solution is to restrict the max size of each WAL entry as a dynamic value, which is the remaining size of the WAL file. Signed-off-by: Benjamin Wang <wachao@vmware.com>
ptabor
approved these changes
Jun 17, 2022
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Thanks @ptabor for the quick review. |
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Backport pull/14122 to 3.5.
The related issue is 14114
cc @ptabor @serathius @spzala