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DPM has detected a discontinuity in the log chain

DPM has detected a discontinuity in the log chain for Production storage group

I have DPM server X64 trying to backup exchange 2007 . I am recieving the following error.



Type:      Tape backup
Status:      Failed
Description:      DPM has detected a discontinuity in the log chain for Storage group Production Storage Group on xxxxxxxx since the last synchronization. (ID 30216 Details: Unspecified error (0x80004005))
      More information
End time:      30/08/2012 16:01:23
Start time:      30/08/2012 16:00:00
Time elapsed:      00:01:22
Data transferred:      0 MB
Cluster node      -
Source details:      Production Storage Group
Protection group:      Protection Group
Library:      Hewlett Packard MSL G3 Series library  (x64 based)
Tape Label (Barcode):       (TH5702LT)
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Tif01
Asked:
Tif01
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1 Solution
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Is it backup of Exchange Database or Incremental ?
Check log sequence with command

eseutil /ml "Location of Log folder\E00" (E00 is the Generation of that storage group)

- Rancy
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Tif01Author Commented:
i am trying to back up Exchange Database which keep failing but I am able to backup system state and Public folder without any problem.

.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Is both Mailbox database and Public database in the same SG or different ?
If there is break in Log sequence the backups cannot complete ..... we need to work around that situation and try to move all logs before the sequence breaks and then try backup ....


But need to understand the situation first correctly :)

- Rancy
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Tif01Author Commented:
Mailbox database and Public database are in different  SG
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
So check the Log sequence and if possible take the data into .txt.

eseutil /ml "Location of Log folder\E00" (E00 is the Generation of that storage group)

- Rancy
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Tif01Author Commented:
i am getting lot of missing log files errors etc

Missing log files: L:\Production Storage group\Logs\E06{0015C4E5 - 001607B7}.log
Missing log files: L:\Production Storage group\Logs\E06{0015C316 - 0015C4DA}.log
Missing log files: L:\Production Storage group\Logs\E06{0015C4E5 - 001607B7}.log
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
See i told you ..... lets start with this when can you have a downtime ?

what is the current log as per time modified ... leaving E00.log :)

- Rancy
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Tif01Author Commented:
Hi Rancy

Thanks for this. i have also got following error  end of the log file

Log file: L:\Production Storage group\Logs\E06.log
                ERROR: Cannot open log file (L:\Production Storage group\Logs\E06.log). Error -1032.

Operation terminated with error -528 (JET_errMissingLogFile, Current log file missing) after 2384.859 seconds.
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Tif01Author Commented:
So what  next im having following log file missing


Verifying log files...
     Base name: E06

      Log file: L:\Production Storage group\Logs\E060012A000.log - OK
      Missing log files: L:\Production Storage group\Logs\E06{0012A001 - 00135122}.log
      Log file: L:\Production Storage group\Logs\E0600135123.log - OK
      Missing log files: L:\Production Storage group\Logs\E06{00135124 - 0015C30B}.log
      Log file: L:\Production Storage group\Logs\E060015C30C.log - OK
      Log file: L:\Production Storage group\Logs\E060015C30D.log - OK
      Log file: L:\Production Storage group\Logs\E060015C30E.log - OK
      Log file: L:\Production Storage group\Logs\E060015C30F.log - OK
      Log file: L:\Production Storage group\Logs\E060015C310.log - OK
      Log file: L:\Production Storage group\Logs\E060015C311.log - OK
      Log file: L:\Production Storage group\Logs\E060015C312.log - OK
      Log file: L:\Production Storage group\Logs\E060015C313.log - OK
      Log file: L:\Production Storage group\Logs\E060015C314.log - OK
      Log file: L:\Production Storage group\Logs\E060015C315.log - OK
      Missing log files: L:\Production Storage group\Logs\E06{0015C316 - 0015C4DA}.log
      Log file: L:\Production Storage group\Logs\E060015C4DB.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4DC.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4DD.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4DE.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4DF.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4E0.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4E1.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4E2.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4E3.log - OK
      Log file: L:\Production Storage group\Logs\E060015C4E4.log - OK
      Missing log files: L:\Production Storage group\Logs\E06{0015C4E5 - 001607B7}.log
      Log file: L:\Production Storage group\Logs\E06001607B8.log - OK
      Log file: L:\Production Storage group\Logs\E06001607B9.log - OK
      Log file: L:\Production Storage group\Logs\E06001607BA.log - OK
      Log file: L:\Production Storage group\Logs\E06001607BB.log - OK
      Log file: L:\Production Storage group\Logs\E06001607BC.log - OK

end of log file report i have this error

Log file: L:\Production Storage group\Logs\E06.log
                ERROR: Cannot open log file (L:\Production Storage group\Logs\E06.log). Error -1032.

Operation terminated with error -528 (JET_errMissingLogFile, Current log file missing) after 2384.859 seconds.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
So what i understand is this is causing the issue.

So simple that you will have to Dismount the Database move all ".log" ".chk" ".jrs" ".temp or .tmp" files out of the location.

You should have only .edb file and nothing else and then mount ..... this will create new set of log files and you should then be able to take good backup :)

If still any doubts buzz me back !

- Rancy
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Tif01Author Commented:
Thanks. .  I have 4 Databases under this location. Do I have to stop any exchange services before I Dismount databases and what happened if databases are failed to Mount after moving the log files in to different location.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
No need to stop any service to dismount .... Is the Exchange 2007 CCR or something or just a Standalone ??

Once you Dismount a Database goes into Clean shutdown and thats all is needed to mount database without any other logs or information :)

- Rancy
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Tif01Author Commented:
Exchange 2007 standalone server
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
So shouldnt be any issues as such .... however if you have any doubts as said earlier do bring up to me to answer all and proceed.

- Rancy
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Tif01Author Commented:
Hi Rancy,

Thanks i have successfully Backed-up full Exchange server. Quick question going forward the transaction logs should be deleted automatically after the full backup or do i need to delete them Manually.  I have unchecked- Enable Circular logging option.

Once again Thanks you are a star *********
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Thanks Tif01 ....... looks good to hear such comments :)

Quick question going forward the transaction logs should be deleted automatically after the full backup or do i need to delete them Manually - They will be Purged once the Full backup completes :)

Once you have the Circular logging disabled ... hope its creating many Log files in the location ..... reason i ask is cause once you Enable or Disable "Circular logging" it requires a Information Store service restart :)

Thats too many Starts :) ....... Thanks once again !!

- Rancy
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