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Commit93b99d3

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Register atexit hook only once in pg_upgrade.
start_postmaster() registered stop_postmaster_atexit as an atexit(3)callback each time through, although the obvious intention was to doso only once per program run. The extra registrations were harmless,so long as we didn't exceed ATEXIT_MAX, but still it's a bug.Artur Zakirov, with bikeshedding by Kyotaro Horiguchi and meDiscussion: <d279e817-02b5-caa6-215f-cfb05dce109a@postgrespro.ru>
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‎src/bin/pg_upgrade/server.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -174,10 +174,11 @@ start_postmaster(ClusterInfo *cluster, bool throw_error)
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{
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charcmd[MAXPGPATH*4+1000];
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PGconn*conn;
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boolexit_hook_registered= false;
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boolpg_ctl_return= false;
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charsocket_string[MAXPGPATH+200];
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staticboolexit_hook_registered= false;
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if (!exit_hook_registered)
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{
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atexit(stop_postmaster_atexit);

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