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ed57cac84d
Instability in the test for pg_walinspect revealed that pg_get_wal_records_info_till_end_of_wal(x) would try to decode all the records with a start LSN earlier than the flush LSN, even though that might include a partial record at the end of the range. In that case, read_local_xlog_page_no_wait() would return NULL when it tried to read past the flush LSN, which would be interpreted as an error by the caller. That caused a test failure only on a BF animal that had been restarted recently, but could be expected to happen in the wild quite easily depending on the alignment of various parameters. Fix by using private data in read_local_xlog_page_no_wait() to signal end-of-wal to the caller, so that it can be properly distinguished from a real error. Discussion: https://postgr.es/m/Ymd/e5eeZMNAkrXo%40paquier.xyz Discussion: https://postgr.es/m/111657.1650910309@sss.pgh.pa.us Authors: Thomas Munro, Bharath Rupireddy. |
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