ORA-03135 When Connecting to the Database

(Doc ID 404724.1)

Last updated on MARCH 08, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.
***Checked for relevance on 04-Feb-2016***


When attempting to connect to the primary database, the following error occurs.

    ORA-03135 connection lost contact

Generating an errorstack trace on the error:

SQL> alter session set events '3135 trace name errorstack level 3';
SQL> connect <username>/<password>


The trace file indicates that we a trying to update the AUDSES$ sequence.
The LGWR process is waiting on the LNS process:

waiting for 'LGWR-LNS wait on channel' blocking sess=0x(nil) seq=59925
wait_time=0 seconds since wait started=0 =0, =0, =0

LNS is waiting:

waiting for 'LNS wait on SENDREQ' blocking sess=0x(nil) seq=446
wait_time=0 seconds since wait started=0 =0, =0, =0




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