Deadlock Don’t Kill Any Session

From the documentation;

A deadlock occurs when two or more session are waiting for data locked by each other, resulting in all the sessions being blocked. Oracle automatically detects and resolves deadlocks by rolling back the statement associated with the transaction that detects the deadlock.

 

Usually  any of the connections involved in the deadlock dies and one of them receives the following error;

ORA-00060: deadlock detected while waiting for resource

 
Today we have been reported that a Tibco adapter has fallen, a Tibco adapter is basically a connection pool from an application, in this case the pool opens 20 connections to a database. Looking at alert.log and trace files, it appears that also died the shared server. The two processes have been involved in deadlock.

 
FINDING

The shared server process has died, possibly by a bug that we reported to MOS. The pool has died because of the connection will be received an ORA-00060 and has failed to treat, knocking all the pool

So 21 connections have fallen ….

 

HTH – Antonio NAVARRO

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s