not able to connect to the database

From: drumil narayan <drumilnarayan@xxxxxxxxx>
To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
Date: Wed, 26 Nov 2008 17:43:06 +0530 (IST)

am not able to connect to our production server, two nod rac.
in oem it is showing metric collection error. in alert logs there are no 
errors. dumps or core have no been generated at other dump destinations.
other sys none of the user is getting connected

what could be the issue...this is critical production system

thanks


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Follow-Ups:

RE: not able to connect to the database
From: Bort, Guillermo

Re: not able to connect to the database
From: David Barbour

References:
- Any-one know how to eliminate PLANNED downtime with Oracle RAC?
  - From: Fahrenfort, Keith (HP Shared Solutions Architect for Oracle)
- Re: Any-one know how to eliminate PLANNED downtime with Oracle RAC?
  - From: LS Cheng
- Method for migrating schema from PROD to DEV
  - From: SHEEHAN, JEREMY
- RE: Method for migrating schema from PROD to DEV
  - From: Baumgartel, Paul
- RE: Method for migrating schema from PROD to DEV
  - From: SHEEHAN, JEREMY
- Re: Method for migrating schema from PROD to DEV
  - From: Bradd Piontek
- Re: Method for migrating schema from PROD to DEV
  - From: bao jiejie

not able to connect to the database

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