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Commit0b84f5c

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author
Amit Kapila
committed
Fix a random failure in 038_save_logical_slots_shutdown.pl.
The test ensures that all the WAL on the publisher is sent to thesubscriber before shutdown by comparing the confirmed_flush_lsn of theassociated slot with the shutdown_checkpoint WAL location. But if theshutdown_checkpoint location falls into a new page in the WAL then thecheck won't work. So, ensure that the shutdown_checkpoint WAL recorddoesn't fall into a new page.Reported-by: Bharath RupireddyAuthor: Bharath RupireddyReviewed-by: Vignesh C, Kuroda Hayato, Amit KapilaDiscussion:https://postgr.es/m/CALj2ACVLzH5CN-h9=S26mdRHPuJ9yDLUw70yh4JOiPw03WL0CQ@mail.gmail.com
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‎src/test/recovery/t/038_save_logical_slots_shutdown.pl

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@@ -60,6 +60,12 @@ sub compare_confirmed_flush
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$node_publisher->safe_psql('postgres',"CREATE TABLE test_tbl (id int)");
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$node_subscriber->safe_psql('postgres',"CREATE TABLE test_tbl (id int)");
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# To avoid a shutdown checkpoint WAL record (that gets generated as part of
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# the publisher restart below) falling into a new page, advance the WAL
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# segment. Otherwise, the confirmed_flush_lsn and shutdown_checkpoint
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# location won't match.
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$node_publisher->advance_wal(1);
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# Insert some data
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$node_publisher->safe_psql('postgres',
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"INSERT INTO test_tbl VALUES (generate_series(1, 5));");
@@ -81,6 +87,10 @@ sub compare_confirmed_flush
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my$offset =-s$node_publisher->logfile;
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# Note: Don't insert any data on the publisher that may cause the shutdown
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# checkpoint to fall into a new WAL file. See the comments atop advance_wal()
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# above.
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# Restart the publisher to ensure that the slot will be flushed if required
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$node_publisher->restart();
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