<div dir="ltr">Hey all,<div><br></div><div>This is a seemingly a pretty bad problem which I uncovered as part of my last post, so the start of the message will be similar.</div><div><br></div><div><div style="font-family:arial,sans-serif;font-size:13px">
I have two pgpool nodes which I am using a TCP load balancer to spread between. I am using watchdog to synchronise PostgreSQL node information between the two and an external HA solution (with ALLOW_TO_FAILOVER).</div><div style="font-family:arial,sans-serif;font-size:13px">
<br></div><div style="font-family:arial,sans-serif;font-size:13px">If I start both my pgpool nodes up I get the following initial state:<br></div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
<div>postgres=# show pool_nodes;</div><div> node_id | hostname | port | status | lb_weight | role</div><div>---------+-------------+------+--------+-----------+---------</div><div> 0 | 10.10.10.1 | 5432 | 2 | 0.500000 | standby</div>
<div> 1 | 10.10.10.2 | 5432 | 2 | 0.500000 | primary</div><div>(2 rows)</div></div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
Now I open a PSQL connection and do the following:</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"><div>postgres=# SELECT inet_server_addr();</div>
<div> inet_server_addr</div><div>------------------</div><div> 10.10.10.2 </div><div>(1 row)</div><div><br></div></div><div style="font-family:arial,sans-serif;font-size:13px"><span style="font-size:small">This shows I am connected to the primary.</span></div>
<div style="font-family:arial,sans-serif;font-size:13px"><span style="font-size:small"><br></span></div><div style="font-family:arial,sans-serif;font-size:13px"><span style="font-size:small">I can run this multiple times and I will always be connected to the primary, as long as I don't close the psql session.</span></div>
<div style="font-family:arial,sans-serif;font-size:13px"><span style="font-size:small"><br></span></div><div style="font-family:arial,sans-serif;font-size:13px">Then from another window I run the following command:<br></div>
<div style><font face="arial, sans-serif"><br></font></div><div style><span style="font-family:arial,sans-serif;font-size:13px"> pcp_detach_node 1 load_balancer 9898 postgres postgres 0</span><br></div><div style><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div><div style><span style="font-family:arial,sans-serif;font-size:13px">And in the same PSQL session run the command again:</span></div><div style><span style="font-family:arial,sans-serif;font-size:13px"><br></span></div>
<div style><span style="font-family:arial,sans-serif;font-size:13px"><div>postgres=# SELECT inet_server_addr();</div><div>SSL SYSCALL error: EOF detected</div><div>The connection to the server was lost. Attempting reset: Succeeded.</div>
<div><br></div><div>This is strange. Why has my master connection been severed?</div><div><br></div><div><span style="color:rgb(50,59,98);font-family:Arial,Helvetica,sans-serif;font-size:14px;font-weight:bold">James Sewell,</span><br>
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