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IDS Forum

Re: Connection Manager Cluster

Posted By: Art Kagel
Date: Wednesday, 20 May 2009, at 8:27 a.m.

In Response To: Connection Manager Cluster (KAMRAN HAQ)

Connection manager ONLY negotiates for the best connection and passes that
servername back to the client application which then connects directly with
the selected instance of IDS. The client does not maintain an active
connection to the connection manager and the connection manager does not
participate in the communications between client and server once it has
supplied the selected servername.

Art

Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.

On Wed, May 20, 2009 at 6:12 AM, KAMRAN HAQ <khaq@i2cinc.com> wrote:

> Hi,
> We are facing a couple of problems with Connection manager cluster. We are
> runing two Connection Manager instances on different machines.
> And both are grouped in the sqlhosts file of Connection Manager. like
>
> g_oltp group - - e=oltp2
> oltp ontlitcp 192.168.0.16 9991 g=g_oltp
> oltp2 ontlitcp 192.168.0.14 9991 g=g_oltp
>
> Problem 1:
>
> Our application acquired the connections to database through Connection
> Manager. We can insert data through that setup.
>
> Later we shutdown the Connection manager, still we are able to insert data.
> How it comes?
>
> Problem 2:
>
> Both Connection Managers are running and one of them is serving the
> requests
> 90for inser etc).
>
> We restarted the database. Database is up again but one of the Connection
> manager is unable to detect the primary again.
>
> Here are some extracts from logs:
>
> Connection manager 1 log (which was stable, we can see in the log that both
> connection manager are added "CM name"):
>
> 16:33:49 Connection Manager successfully connected to ids_net_rss1_11
> 16:33:50 Arbitrator FOC string = HDR+RSS,120
> 16:33:50 Arbitrator setting primary name = ids_rss1_11 [cmsm_arb.c:518]
> 16:33:50 FOC[0] = HDR
> 16:33:50 FOC[1] = RSS
> 16:33:50 FOC timeout = 120
> 16:33:50 get ids_net_rss1_11 CM_ADM event 8:3 cm_test11@16
> [cmsm_server.ec:1138]
> 16:33:50 Arbitrator received CM event, subtype=3, cm=cm_test11@16
> [cmsm_arb.c:533]
> 16:33:50 Arbitrator reinitialized CM names [cmsm_arb.c:479]
> 16:33:50 Arbitrator added CM name = cm_test11@16 [cmsm_arb.c:418]
> 16:33:54 SLA oltp redirect SQLI client from 192.168.0.58 to ids_net_rss1_11
> 192.168.0.14.6031 [cmsm_main.c:1279]
> 16:34:37 get ids_net_pri11 CM_ADM event 8:4 cm_test11@14 [
> cmsm_server.ec:1138]
> 16:34:37 Arbitrator received CM event, subtype=4, cm=cm_test11@14
> [cmsm_arb.c:533]
> 16:34:39 get ids_net_rep11 CM_ADM event 8:4 cm_test11@14 [
> cmsm_server.ec:1138]
> 16:34:39 Arbitrator received CM event, subtype=4, cm=cm_test11@14
> [cmsm_arb.c:533]
> 16:34:49 get ids_net_pri11 CM_ADM event 8:3 cm_test11@14 [
> cmsm_server.ec:1138]
> 16:34:49 get ids_net_rss1_11 CM_ADM event 8:3 cm_test11@14
> [cmsm_server.ec:1138]
> 16:34:49 Arbitrator received CM event, subtype=3, cm=cm_test11@14
> [cmsm_arb.c:533]
> 16:34:49 Arbitrator reinitialized CM names [cmsm_arb.c:479]
> 16:34:49 Arbitrator added CM name = cm_test11@16 [cmsm_arb.c:418]
> 16:34:49 Arbitrator added CM name = cm_test11@14 [cmsm_arb.c:418]
> 16:34:50 get ids_net_rep11 CM_ADM event 8:3 cm_test11@14 [
> cmsm_server.ec:1138]
> 16:35:06 SLA oltp redirect SQLI client from 192.168.33.220 to
> ids_net_rss1_11
> 192.168.0.14.6031 [cmsm_main.c:1279]
>
> Connection Manager 2 log (here we can see that after database restart it is
> unable to detect primary again)
>
> 15:13:26 FOC timeout = 120
> 15:13:26 get ids_net_rep11 CM_ADM event 8:3 cm_test11@14 [
> cmsm_server.ec:1138]
> 15:13:26 Connection Manager started successfully
> 15:16:19 get ids_net_rss1_11 SRV_ADM event 16:3 4 [cmsm_server.ec:1167]
> 15:16:23 fetch sysrepstats_cursor SQLCODE = (-25582,9,) [
> cmsm_server.ec:1085]
> 15:16:23 unregister event failed, sqlcode = (-1811,0,) [cmsm_server.ec:942
> ]
> 15:16:23 Connection Manager disconnected from ids_net_rss1_11
> 15:16:23 Arbitrator detected down server, svr=ids_net_rss1_11, type=65536
> [cmsm_arb.c:923]
> 15:16:23 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
> 15:16:23 get ids_net_pri11 CLUST_CHG event 1:6 ids_net_rss1_11
> [cmsm_server.ec:1097]
> 15:16:23 get ids_net_rep11 CLUST_CHG event 1:4 ids_net_rss1_11|Primary|
> [cmsm_server.ec:1097]
> 15:16:24 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
> 15:16:25 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
> 15:16:26 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
> 15:16:27 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
> 15:16:28 Arbitrator = cm_test11@14 not active, waiting to detect primary
> [cmsm_arb.c:954]
>
> Database log (onstat -m, here we can see that one of the Connection manager
> is
> registered but not the other one.
>
> 14:39:10 SCHAPI: Started 2 dbWorker threads.
> 14:39:11 CM:Connection manager cm_test11@16 registered with the server
>
> Can some help for both problems. We are planning to use the Connection
> Manager
> on production.
> Note: We are using Java MI Pool in our application that requests the
> connections through Connection manager.
>
> regards,
> Kamran
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--001636c5a5011fca72046a5726f7

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