It is not reporting status to OMS. If it was reporting status to OMS,
OMS could do something similar to "srvctl status listener" and we have
our answer. However, you cannot get a TNS error doing "svrctl status
listener". If it was OMS, you could check your local listener log using
adrci and find the error. It looks like the OEM trying external
connection from the OEM host to your RAC. I may be wrong. Please check
the listener log using the ADRCI tool.
Regards
On 12/1/19 7:46 PM, Jack van Zanen wrote:
Hang on, I am confused now.--
I thought that the agent on the database host reports the status of the listener to OMS. So I read this as the agent on database host could not connect to listener on database host.
Are you saying that we can get this because the OMS server can not connect to the listener?
Jack van Zanen
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Thank you for your cooperation
On Mon, Dec 2, 2019 at 11:35 AM Mladen Gogala <gogala.mladen@xxxxxxxxx <mailto:gogala.mladen@xxxxxxxxx>> wrote:
Hi Jack,
That can also be a problem with DNS or a network route. If the
host hosting the OEM cannot reach listener for whatever reason,
you will get this error. It can be something as trivial as a bad
port on the switch or change in DNS server.
Regards
On 12/1/19 7:19 PM, Jack van Zanen wrote:
intermittently we get some alert from OEM about listener being down.
Target name=*LISTENER_SCAN3_telstraexa1-000_1*
<https://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2FNSW-ATP-GRID.snl.7net.com.au%3A7799%2Fem%2Fredirect%3FpageType%3DTARGET_HOMEPAGE%26targetName%3DLISTENER_SCAN3_telstraexa1-000_1%26targetType%3Doracle_listener&data=01%7C01%7CJVanZanen%40Seven.com.au%7C5514208b3d2848d8fe9f08d774d613ee%7Cb359291241554399b790752c894d2935%7C0&sdata=Pww2ktObyuQu4vBRxuWvcmAGkXXJIozv%2F8nHJP1ABHE%3D&reserved=0>
Categories=*Availability*
Message=*The listener is down: TNS-12545: Connect failed because
target host or object does not exist .*
<https://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2FNSW-ATP-GRID.snl.7net.com.au%3A7799%2Fem%2Fredirect%3FpageType%3Dsdk-core-event-console-detailEvent%26issueID%3DE43696ECA26F42148CCCD6EC4862F4A9&data=01%7C01%7CJVanZanen%40Seven.com.au%7C5514208b3d2848d8fe9f08d774d613ee%7Cb359291241554399b790752c894d2935%7C0&sdata=z%2FQDPTS5qbEkx1MB8kdz3JKvyYGToJ4%2BUbcptqfRc7I%3D&reserved=0>
Checking the server we see no issue with the listener being down.
grid 24040 1 0 Nov23 ? 00:03:48
/u01/app/12.2.0.1/grid/bin/tnslsnr
<http://12.2.0.1/grid/bin/tnslsnr> ASMNET1LSNR_ASM -no_crs_notify
-inherit
grid 24402 1 0 Nov23 ? 00:04:58
/u01/app/12.2.0.1/grid/bin/tnslsnr
<http://12.2.0.1/grid/bin/tnslsnr> LISTENER -no_crs_notify -inherit
grid 234773 1 0 Nov23 ? 00:02:16
/u01/app/12.2.0.1/grid/bin/tnslsnr
<http://12.2.0.1/grid/bin/tnslsnr> LISTENER_SCAN2 -no_crs_notify
-inherit
grid 234791 1 0 Nov23 ? 00:02:13
/u01/app/12.2.0.1/grid/bin/tnslsnr
<http://12.2.0.1/grid/bin/tnslsnr> LISTENER_SCAN3 -no_crs_notify
-inherit
This is Oracle 12.2 on Exadata Cloud at Customer solution .
Anyone else seen this behaviour before?
Oracle suggested to turn on client and server sql net tracing but
I am a bit hesitant due to the sheer volume of tracing it will
likely generate before I get the issue again.
To me it looks like a DNS issue, but Oracle looked at this and
there is no issues there.
Jack van Zanen
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This e-mail and any attachments may contain confidential material
for the sole use of the intended recipient. If you are not the
intended recipient, please be aware that any disclosure, copying,
distribution or use of this e-mail or any attachment is
prohibited. If you have received this e-mail in error, please
contact the sender and delete all copies.
Thank you for your cooperation
-- Mladen Gogala
Database Consultant
Tel: (347) 321-1217
