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PM44878: albd_server registry files stop writing to the permanent registr y files when a child process terminates and journaling stops

Fixes are available

Rational ClearCase Fix Pack (7.1.2.5) for version 7.1.2
Rational ClearCase Fix Pack (8.0.0.1) for version 8.0
Rational ClearCase Fix Pack 14 (7.1.2.14) for 7.1.2
Rational ClearCase Fix Pack 11 (8.0.0.11) for 8.0
Rational ClearCase Fix Pack 12 (8.0.0.12) for 8.0
Rational ClearCase Fix Pack 15 (7.1.2.15) for 7.1.2
Rational ClearCase Fix Pack 13 (8.0.0.13) for 8.0
Rational ClearCase Fix Pack 16 (7.1.2.16) for 7.1.2
Rational ClearCase Fix Pack 17 (7.1.2.17) for 7.1.2
Rational ClearCase Fix Pack 14 (8.0.0.14) for 8.0
Rational ClearCase Fix Pack 18 (7.1.2.18) for 7.1.2
Rational ClearCase Fix Pack 15 (8.0.0.15) for 8.0
Rational ClearCase Fix Pack 19 (7.1.2.19) for 7.1.2
Rational ClearCase Fix Pack 16 (8.0.0.16) for 8.0
Rational ClearCase Fix Pack 17 (8.0.0.17) for 8.0
Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0
Rational ClearCase Fix Pack 19 (8.0.0.19) for 8.0
Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
Rational ClearCase Fix Pack 21 (8.0.0.21) for 8.0

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APAR status

  • Closed as program error.

Error description

  • albd_server registry files stop writing to the permanent
registry files when a child process terminates and interrupts
the journaling process


RedHat Enterprise 5

ClearCase 7.1.2.x


When reviewing the registry files within the
/var/adm/rational/clearcase/rgy/ directory on a ClearCase
Registry Server, the following is seen:

-rw-rw-r--  1 root    root      2078494 Jul 29 08:02
view_object_journal
-rw-r--r--  1 root    root      2351104 Jul 22 14:05
view_object.new
-rw-r--r--  1 root    root     40172374 Jul 22 14:03 view_tag

-rw-rw-r--  1 root    root      5677681 Jul 29 08:02
view_tag_journal
-rw-r--r--  1 root    root      1933312 Jul 22 14:05
view_tag.new
-rw-r--r--  1 root    root       225363 Jul 29 05:21 vob_object

-rw-r--r--  1 root    root      2729038 Jul 26 11:02 vob_tag

-rw-rw-r--  1 root    root        54803 Jul 29 05:20
vob_tag_journal


As noted above, the view_object does not exist and the
view_object, view_tag and vob_tag are al journaling their
entries and not updating the permanent files.

   NOTE:  The nature and combination of which registry files are
affected may differ from site to site that experience the update
problem.

When reviewing the last update times from above, the following
logs correspond to the same time:

System Messages file:
Jul 22 14:05:07 rgyhost  kernel: credmap_server[7216]: segfault
at 0000000000000030 rip 00000000f7b2366a rsp 00000000ffa5f868
error 6

albd_log:
2011-07-22T14:05:26-04:00 albd_server(3372): Ok: Server
credmap_server(7216) exited due to signal 11

   NOTE:  The nature of which forked child process from the
albd_server that terminates is not specific:  The above is
simply an example of one case where the journaling stopped
writing to the permanent registry files.

As seen above, the child process which terminated had ultimately
interrupted the albd_server registry journaling process which
never recovers.  Thus, all of the changes are within the memory
of the albd_server process and are no longer written to disk.


Days later, the following error may be seen within the albd_log:

2011-07-26T11:07:39-04:00 albd_server(3372): Error: Unable to
write to registry file
'/var/adm/rational/clearcase/rgy/vob_tag.new': Input/output
error.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
albd_server registry files stop writing to the permanent
registry files when a child process terminates and
interrupts the journaling process


RedHat Enterprise 5

ClearCase 7.1.2.x


When reviewing the registry files within the
/var/adm/rational/clearcase/rgy/ directory on a ClearCase
Registry Server, the following is seen:

-rw-rw-r--  1 root    root 2078494 Jul 29 08:02
view_object_journal
-rw-r--r--  1 root    root 2351104 Jul 22 14:05
view_object.new
-rw-r--r--  1 root    root     40172374 Jul 22 14:03
view_tag
-rw-rw-r--  1 root    root 5677681 Jul 29 08:02
view_tag_journal
-rw-r--r--  1 root    root 1933312 Jul 22 14:05
view_tag.new
-rw-r--r--  1 root    root  225363 Jul 29 05:21
vob_object
-rw-r--r--  1 root    root 2729038 Jul 26 11:02 vob_tag

-rw-rw-r--  1 root    root   54803 Jul 29 05:20
vob_tag_journal


As noted above, the view_object does not exist and the
view_object, view_tag and vob_tag are al journaling their
entries and not updating the permanent files.

   NOTE:  The nature and combination of which registry files
are affected may differ from site to site that experience
the update problem.

When reviewing the last update times from above, the
following logs correspond to the same time:

System Messages file:
Jul 22 14:05:07 rgyhost  kernel: credmap_server[7216]:
segfault at 0000000000000030 rip 00000000f7b2366a rsp
00000000ffa5f868 error 6

albd_log:
2011-07-22T14:05:26-04:00 albd_server(3372): Ok: Server
credmap_server(7216) exited due to signal 11

   NOTE:  The nature of which forked child process from the
albd_server that terminates is not specific:  The above is
simply an example of one case where the journaling stopped
writing to the permanent registry files.

As seen above, the child process which terminated had
ultimately interrupted the albd_server registry journaling
process which never recovers.  Thus, all of the changes are
within the memory of the albd_server process and are no
longer written to disk.


Days later, the following error may be seen within the
albd_log:

2011-07-26T11:07:39-04:00 albd_server(3372): Error: Unable
to write to registry file
"/var/adm/rational/clearcase/rgy/vob_tag.new": Input/output
error.

    



Problem conclusion


    

  • A fix is available in ClearCase versions 7.1.1.8, 7.1.2.5
and 8.0.0.1

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PM44878
    • 

  • Reported component name
    CLEARCASE UNIX
    • 

  • Reported component ID
    5724G2901
    • 

  • Reported release
    712
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-08-01
    • 

  • Closed date
    2011-12-16
    • 

  • Last modified date
    2011-12-16
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    CLEARCASE UNIX
    • 

  • Fixed component ID
    5724G2901
    • 



Applicable component levels


    

  • R712  PSN
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.1.2","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            16 December 2011
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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