Experience: is what you get soon after you need it.

Experience: is what you get soon after you need it.

****************I am authoring a Book on Oracle Database Cloud Services.......More details to follow.***************

Title : Oracle Database Cloud Revealed
Publisher : Apress
Release Date : Jan-2019

**********************************************************************************


Rasul Allah (sal Allahu alaihi wa sallam) said: "Restore the trusts of those who trust you, and deal not falsely with him who deals falsely with you." [Abu Dawud, Tirmidhi]


My Cloud Certifications:
Oracle Cloud Infrastructure 2018 Certified Architect Associate.
Oracle Cloud Infrastructure Classic 2018 Certified Architect Associate.
Oracle Database Cloud Administrator Certified Professional.
Oracle Database Cloud Service Operations Certified Associate.

Search This Blog

Wednesday, September 14, 2011

ORA-00494: enqueue [CF] held for too long on NFS mount

DB Version: 11.2.0.1.

NFS was mounted with below options and when we try to backup the controlfile via sqlplus or RMAN. we get the below enqueue error.
no rw,bg,hard,nointr,rsize=32768,wsize=32768,proto=tcp,noac,forcedirectio,vers=3,suid


Backup on NFS mount:
SQL> set time on echo on feedback on
09:49:36 SQL> alter database backup controlfile to '/NFSMOUNT/cloning/control_nfs_09142011.ctl';
alter database backup controlfile to '/NFSMOUNT/cloning/control_nfs_09142011.ctl'
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 23041
Session ID: 4796 Serial number: 395


10:16:40 SQL>

Alert log:
alter database backup controlfile to '/NFSMOUNT/cloning/control_nfs_09142011.ctl'
Wed Sep 14 10:04:19 2011
Incremental checkpoint up to RBA [0x128.85a78.0], current log tail at RBA [0x128.870c8.0]
Wed Sep 14 10:05:19 2011
Errors in file /icm01/u0001/app/diag/rdbms/icmqc/ICMQC1/trace/ICMQC1_diag_8307.trc (incident=956919):
ORA-00494: enqueue [CF] held for too long (more than 900 seconds) by 'inst 1, osid 23041'
Incident details in: /icm01/u0001/app/diag/rdbms/icmqc/ICMQC1/incident/incdir_956919/ICMQC1_diag_8307_i956919.trc
Wed Sep 14 10:05:25 2011
Sweep [inc][956919]: completed
Sweep [inc2][956919]: completed
Wed Sep 14 10:06:19 2011
Killing enqueue blocker (pid=23041) on resource CF-00000000-00000000 by (pid=8685)
by killing session 4796.395
Wed Sep 14 10:10:39 2011
Killing enqueue blocker (pid=23041) on resource CF-00000000-00000000 by (pid=8321)
by killing session 4796.395
Wed Sep 14 10:16:39 2011
Killing enqueue blocker (pid=23041) on resource CF-00000000-00000000 by (pid=8321)
by terminating the process
Wed Sep 14 10:22:05 2011
Errors in file /icm01/u0001/app/diag/rdbms/icmqc/ICMQC1/trace/ICMQC1_diag_8307.trc (incident=956920):
ORA-00494: enqueue [CF] held for too long (more than 900 seconds) by 'inst 1, osid 23041'
Incident details in: /icm01/u0001/app/diag/rdbms/icmqc/ICMQC1/incident/incdir_956920/ICMQC1_diag_8307_i956920.trc
Wed Sep 14 10:22:35 2011
Sweep [inc][956920]: completed
Sweep [inc2][956920]: completed
Wed Sep 14 10:24:23 2011
Incremental checkpoint up to RBA [0x128.87fc1.0], current log tail at RBA [0x128.88243.0]
Wed Sep 14 10:28:19 2011
Killing enqueue blocker (pid=23041) on resource CF-00000000-00000000 by (pid=8685)
by killing session 4796.395
Wed Sep 14 10:32:39 2011
Killing enqueue blocker (pid=23041) on resource CF-00000000-00000000 by (pid=8321)
by terminating the process

Backup on local disk:


SQL> alter database backup controlfile to '/ora_backup/u0001/control_disk_09142011.ctl';

Database altered.

SQL>

Solution:

2 comments:

Alex Bandit said...

precisionsignz.com This is an interesting information..... Keep updating your blog. Thanks a lot for the share.... Thanks!

Anonymous said...

Hi,

did you check this Bug?
(Bug 7411568 is fixed in 10.2.0.5 and 11.2.0.1)

What is your version?

BR,
Gergö