<div dir="ltr">Hi Tatsuo,<div><br></div><div style>Do you have any feedback on this issue? The user is asking us for an update on this issue, we weren't able to reproduce the problem locally hence we asked for the pgpool logs that were shared with you. </div>
<div style><br></div><div style>What would be the best way to progress this further?</div><div style><br></div><div style>-- Ahsan</div><div style><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Mon, Apr 29, 2013 at 2:05 PM, Asif Naeem <span dir="ltr"><<a href="mailto:anaeem.it@gmail.com" target="_blank">anaeem.it@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>Please find attached file, It contains more feedback from customer. Thanks.</div><div><br></div>Best Regards,<div>Asif Naeem<div><div class="h5"><br><br><div class="gmail_quote">On Sun, Apr 28, 2013 at 3:25 PM, Asif Naeem <span dir="ltr"><<a href="mailto:anaeem.it@gmail.com" target="_blank">anaeem.it@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Hi Tatsuo,<br><br><div>Please find the attach file, it contains pgpool log information with details. Thanks.<br><br>
Best Regards,<br>Asif Naeem</div><div><br></div><div class="gmail_quote"><div>On Mon, Apr 22, 2013 at 3:34 AM, Tatsuo Ishii <span dir="ltr"><<a href="mailto:ishii@postgresql.org" target="_blank">ishii@postgresql.org</a>></span> wrote:<br>
</div><div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Can you please show pgpool log?<br>
--<br>
Tatsuo Ishii<br>
SRA OSS, Inc. Japan<br>
English: <a href="http://www.sraoss.co.jp/index_en.php" target="_blank">http://www.sraoss.co.jp/index_en.php</a><br>
Japanese: <a href="http://www.sraoss.co.jp" target="_blank">http://www.sraoss.co.jp</a><br>
<div><br>
> Hi,<br>
><br>
> There is unexpected behavior in pgpool2 that seems to be a bug. Please find<br>
> the details as following i.e.<br>
><br>
> Phenomenon<br>
><br>
>> pgpool2 configuration option "follow_master_command" special character %H<br>
>> (Hostname of the new master node) is not working as expected<br>
>> In master slave mode after failover, 2nd node become new master but got<br>
>> unexpected hostname (via %H). Please find attached pgpool.conf for details.<br>
><br>
><br>
> Versions<br>
><br>
>> OS version: RHEL - 64<br>
>> pgpool version: pgpool-II version 3.2.1 (namameboshi)<br>
><br>
><br>
</div>> *Details/Observations* :-<br>
<div><div>><br>
>> At Start<br>
><br>
>> node_id | hostname | port | status | lb_weight | role<br>
>> ---------+----------+------+--------+-----------+---------<br>
>> 0 | dmp02 | 5444 | 2 | 0.333333 | primary<br>
>> 1 | dmp03 | 5444 | 2 | 0.333333 | standby<br>
>> 2 | dmp04 | 5444 | 2 | 0.333333 | standby<br>
>><br>
><br>
><br>
>> Failover arguments when the user stopped DMP02.<br>
><br>
>> 2013îN 2åé 8ì˙ ã‡ójì˙ 12:44:12 JST<br>
><br>
> FAILED_NODE_ID =0<br>
>> FAILED_NODE_NAME=dmp02<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
>> NEW_MASTER_NAME =dmp03<br>
>> OLD_PRIMARY_ID =0<br>
>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
>> 0<br>
>><br>
><br>
><br>
>> Then, these arguments told user that the master node has been changed<br>
><br>
>> 2013îN 2åé 8ì˙ ã‡ójì˙ 12:44:13 JST<br>
>> FAILED_NODE_ID =0<br>
>> FAILED_NODE_NAME=dmp02<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
>> NEW_MASTER_NAME =dmp03<br>
>> OLD_PRIMARY_ID =0<br>
>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
>> 2013îN 2åé 8ì˙ ã‡ójì˙ 12:44:17 JST<br>
>> FAILED_NODE_ID =2<br>
>> FAILED_NODE_NAME=dmp04<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
</div></div>>> NEW_MASTER_NAME =dmp02 *<--- *** The master name is unexpected ****<br>
<div><div>>> OLD_PRIMARY_ID =0<br>
>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
>><br>
><br>
><br>
>> node_id | hostname | port | status | lb_weight | role<br>
>> ---------+----------+------+--------+-----------+---------<br>
>> 0 | dmp02 | 5444 | 2 | 0.333333 | standby<br>
>> 1 | dmp03 | 5444 | 2 | 0.333333 | primary<br>
>> 2 | dmp04 | 5444 | 2 | 0.333333 | standby<br>
>><br>
><br>
><br>
>> pid | usesysid | usename | application_name | client_addr |<br>
>> client_hostname | client_port | backend_start | state<br>
>> | sent_location | write_location | flush_location | replay_location |<br>
>> sync_priority | sync_state<br>
>><br>
>> -------+----------+--------------+------------------+---------------+-----------------+-------------+----------------------------------+-----------+---------------+----------------+----------------+-----------------+---------------+------------<br>
>> 20641 | 10 | enterprisedb | dmp02 | 172.24.217.23 |<br>
>> | 16948 | 08-FEB-13 17:39:44.078173 +09:00 | streaming |<br>
>> 14/C50000E0 | 14/C50000E0 | 14/C50000E0 | 14/C50000E0 |<br>
>> 0 | async<br>
>> (1 çs)<br>
>><br>
><br>
> There is one pg_stat_replication record because dmp04 is connecting to dmp02<br>
><br>
> This phenomenon is reproduced by user. What we need to do is just make the<br>
> scripts like follow_master.sh and launch pgpool process with -F [path to<br>
> pcp.conf].<br>
><br>
> 1. Before failover<br>
><br>
>> -bash-3.2$ psql -h 10.1.1.187 -p 9999 -c "show pool_nodes"<br>
>> node_id | hostname | port | status | lb_weight | role<br>
>> ---------+----------+------+--------+-----------+---------<br>
>> 0 | slave1 | 5444 | 2 | 0.333333 | primary<br>
>> 1 | slave2 | 5444 | 2 | 0.333333 | standby<br>
>> 2 | slave3 | 5444 | 2 | 0.333333 | standby<br>
>> (3 行)<br>
><br>
><br>
> 2. We stopped slave 1 node with "pg_ctl -D /data -m immediate stop".<br>
><br>
> 3. After failover<br>
><br>
>> -bash-3.2$ psql -h 10.1.1.187 -p 9999 -c "show pool_nodes"<br>
>> node_id | hostname | port | status | lb_weight | role<br>
>> ---------+----------+------+--------+-----------+---------<br>
>> 0 | slave1 | 5444 | 2 | 0.333333 | standby<br>
>> 1 | slave2 | 5444 | 2 | 0.333333 | primary<br>
>> 2 | slave3 | 5444 | 2 | 0.333333 | standby<br>
>> (3 行)<br>
><br>
><br>
> 4. Then user got output like below after failover that is not expected that<br>
> is present at the end of follow_master.sh.log i.e.<br>
><br>
>> NEW_MASTER_NAME =slave1<br>
><br>
><br>
> [root@master1 ~]# cat /tmp/failover.sh.log<br>
><br>
>> 2013年 3月 13日 水曜日 11:36:28 JST<br>
>> FAILED_NODE_ID =0<br>
>> FAILED_NODE_NAME=slave1<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
>> NEW_MASTER_NAME =slave2<br>
>> OLD_PRIMARY_ID =0<br>
>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
>> 0<br>
>><br>
> [root@master1 ~]# cat /tmp/follow_master.sh.log<br>
><br>
>> 2013年 3月 13日 水曜日 11:36:30 JST<br>
>> FAILED_NODE_ID =0<br>
>> FAILED_NODE_NAME=slave1<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
>> NEW_MASTER_NAME =slave2<br>
>> OLD_PRIMARY_ID =0<br>
>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
>> 2013年 3月 13日 水曜日 11:36:32 JST<br>
>> FAILED_NODE_ID =2<br>
>> FAILED_NODE_NAME=slave3<br>
>> FAILED_NODE_PORT=5444<br>
>> FAILED_NODE_DATA=/opt/PostgresPlus/9.2AS/data<br>
>> NEW_MASTER_ID =1<br>
>> OLD_MASTER_ID =0<br>
</div></div>>> NEW_MASTER_NAME =*slave1<br>
>> *OLD_PRIMARY_ID =0<br>
<div><div>>> NEW_MASTER_DATA =/opt/PostgresPlus/9.2AS/data<br>
><br>
><br>
> Please guide. Thanks.<br>
><br>
> Best Regards,<br>
> Asif Naeem<br>
</div></div></blockquote></div></div></div><br></div>
</blockquote></div><br></div></div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Ahsan Hadi<br>Snr Director Product Development<br>EnterpriseDB Corporation<br>The Enterprise Postgres Company<br><br>Phone: +92-51-8358874 <br>Mobile: +92-333-5162114<br>
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