Hi
I confirmed with Oracle and the error does actually come from the agent on
the host and simply does a tnsping
Regards
Jack van Zanen
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On Mon, Dec 2, 2019 at 11:54 AM Mladen Gogala <gogala.mladen@xxxxxxxxx>
wrote:
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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On Mon, Dec 2, 2019 at 11:35 AM Mladen Gogala <gogala.mladen@xxxxxxxxx>
wrote:
Hi Jack,Mladen Gogala
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 ASMNET1LSNR_ASM -no_crs_notify -inherit
grid 24402 1 0 Nov23 ? 00:04:58 /u01/app/
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 LISTENER_SCAN2 -no_crs_notify -inherit
grid 234791 1 0 Nov23 ? 00:02:13 /u01/app/
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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Thank you for your cooperation
--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
--
Database Consultant
Tel: (347) 321-1217
