crl-release-24.1: wal: fix reader buffer reuse #3868
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While stitching together physical WAL segments, the WAL reader reads each record's contents into a temporary buffer. Previously, if an error was encountered mid-copy of a record (eg, because the record was large enough to be split across multiple chunks), the buffer was not reset before attempting to read the next file's record. This corruption could prevent replay of the WAL. This commit fixes the bug moving the buffer reset to immediately precede its use. Informs cockroachdb#3865.
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jbowens
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RaduBerinde
approved these changes
Aug 20, 2024
sumeerbhola
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Aug 20, 2024
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While stitching together physical WAL segments, the WAL reader reads each record's contents into a temporary buffer. Previously, if an error was encountered mid-copy of a record (eg, because the record was large enough to be split across multiple chunks), the buffer was not reset before attempting to read the next file's record. This corruption could prevent replay of the WAL.
This commit fixes the bug moving the buffer reset to immediately precede its use.
Informs #3865.