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repmgr: prevent termination in corner-case situation

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If neither the local node nor the upstream are available, and
"standby_disconnect_on_failover" is set, attempting to fetch
the walreceiver PID will result in repmgrd terminating.

Add a check that the connection is valid before attempting to
fetch the walreceiver PID.

Addresses GitHub #675.
This commit is contained in:
Ian Barwick
2020-11-17 16:32:33 +09:00
parent 9c04de11fc
commit 8f7a32a9a2
2 changed files with 29 additions and 1 deletions
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6
sysutils.c
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@@ -363,6 +363,12 @@ enable_wal_receiver(PGconn *conn, bool wait_startup)
/* make timeout configurable */
int i, timeout = 30;
if (PQstatus(conn) != CONNECTION_OK)
{
log_error(_("database connection not available"));
return UNKNOWN_PID;
}
if (is_superuser_connection(conn, NULL) == false)
{
log_error(_("superuser connection required"));