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    Damaged Kopano DB, partial restore with errors

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    • fbartels
      fbartels Kopano @olabre last edited by

      Hi @olabre ,

      @olabre said in Damaged Kopano DB, partial restore with errors:

      MAPI_E_DISK_ERROR

      is the error Kopano gives, if the server is not able to find the expected data in the database (so its not really related to the disk, but more the database).

      @olabre said in Damaged Kopano DB, partial restore with errors:

      able to rescue parts of the data

      which parts?

      In general I would say the outlook is grim unless you are not able to get a complete dump or your database or a prior full backup.

      Regards Felix

      Resources:
      https://kopano.com/blog/how-to-get-kopano/
      https://documentation.kopano.io/
      https://kb.kopano.io/

      Support overview:
      https://kopano.com/support/

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      • olabre
        olabre last edited by

        Thanks Felix,
        I try to restore the database with innodb rescue mode but mysql looses connection on some point so I cannot dump the hole data. It is more or less the properties and tproperties table. The rest themes fine. Anyway when I try to import structure only it says missing primery key. Can you share a structure dump of the database?
        That would be helpful to go ahead.

        Olaf

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        • olabre
          olabre last edited by olabre

          I have a version up and running - webapp is loading with progress bar. The query in phpmyadmin is

          SELECT hierarchy.id, properties.val_ulong FROM hierarchy LEFT JOIN properties ON properties.hierarchyid=hierarchy.id AND properties.tag=26512 AND properties.type=3 WHERE hierarchy.type=3 AND hierarchy.flags=2

          Db themes to be stuck.
          Log files says:

          Thu Sep 7 09:47:34 2017: [error ] KDatabase::Connect(): database access error -2147483641, mysql error: Lost connection to MySQL server a$
          Thu Sep 7 09:47:34 2017: [error ] KDatabsae::DoSelect(): query failed: SELECT hierarchy.id, properties.val_ulong FROM hierarchy LEFT JOIN$
          Thu Sep 7 09:47:34 2017: [error ] Unable to load searchfolders
          Thu Sep 7 09:47:35 2017: [ notice] Server shutdown complete.

          I am not sure if this matters but there is a typo: KDatabsae

          Olaf

          fbartels 1 Reply Last reply Reply Quote 0
          • fbartels
            fbartels Kopano @olabre last edited by

            @olabre said in Damaged Kopano DB, partial restore with errors:

            I am not sure if this matters but there is a typo: KDatabsae

            That is just a typo in the log message. I created https://jira.kopano.io/browse/KC-804 to have this fixed.

            @olabre said in Damaged Kopano DB, partial restore with errors:

            It is more or less the properties and tproperties table.

            @olabre said in Damaged Kopano DB, partial restore with errors:

            SELECT hierarchy.id, properties.val_ulong FROM hierarchy LEFT JOIN properties ON properties.hierarchyid=hierarchy.id AND properties.tag=26512 AND properties.type=3 WHERE hierarchy.type=3 AND hierarchy.flags=2
            Db themes to be stuck.

            you query is reading from the incomplete properties table.

            You can find some information on the database structure in https://stash.kopano.io/projects/KC/repos/kopanocore/browse/doc/Database_structure.md

            Regards Felix

            Resources:
            https://kopano.com/blog/how-to-get-kopano/
            https://documentation.kopano.io/
            https://kb.kopano.io/

            Support overview:
            https://kopano.com/support/

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            • olabre
              olabre last edited by olabre

              so this will mean that a non complete DB export wont work anyway - right?
              or is it more or less a structure issue?

              fbartels 1 Reply Last reply Reply Quote 0
              • fbartels
                fbartels Kopano @olabre last edited by

                @olabre yes, you cannot mix tables from different installations, as all of those tables are connected.

                If you have a subscription you could also open up a support case to talk this issue through, but without a complete database dump there is nothing that can be done.

                Regards Felix

                Resources:
                https://kopano.com/blog/how-to-get-kopano/
                https://documentation.kopano.io/
                https://kb.kopano.io/

                Support overview:
                https://kopano.com/support/

                1 Reply Last reply Reply Quote 0
                • mcostan
                  mcostan last edited by

                  Hi,

                  Do you have any errors in the mysql.log or that’s completely clean now?

                  When you recovered the data, did you use the innodb as per:

                  https://dev.mysql.com/doc/refman/5.7/en/forcing-innodb-recovery.html

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                  • olabre
                    olabre last edited by olabre

                    Hi, thanks for taking care. The support request was sent by company IT25 in Leipzig already. The innodb repair was used as link indicates. I had to set to level 4 - after some fixing level 2 works. In the end myql lost connection when dumping. Ibdata1 file has 10 GB of size.
                    On dumping mysql connections dies on specific rows. I tried to exclude that rows when dumping using --where in mysqldump command. As there are more than one rows affected it is a puzzle games as I have to find out the matching hierachyID for affected rows. This request dies in phpmaydmin for some rows so I cannot get full dump. But in the end this way might work when I am able to use more than one hierachyID in a single mysqldump.
                    mysql.log and mysql.err is empty

                    Olaf

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                    • mcostan
                      mcostan last edited by

                      Have you tried a higher level than 4?

                      1 Reply Last reply Reply Quote 0
                      • olabre
                        olabre last edited by

                        I am not really sure but I think I had to use 5 once to get it started in the first step.

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                        • mcostan
                          mcostan last edited by

                          I experienced database crashes and corruptions in the past and I always was able to resolve it by using the lowest innodb recovery setting that would let me have a full dump.

                          Do you still have the original corrupted database? If yes, you could increase the innodb recovery settings till you are able to get a full dump without mysql to stop.

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                          • olabre
                            olabre last edited by

                            This is what I did starting with 1 - none worked except 5 - after this I was able to get back to 2

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                            • mcostan
                              mcostan last edited by

                              and if you let it at 5 and get a mysqldump would you have been able to get a full dump?

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                              • olabre
                                olabre last edited by

                                this is the result:
                                mysqldump --user=root -p"$(cat /etc/mysql.secret)" kopano --skip-extended-insert | gzip > dumpfilename_kopano_170907.sql.gz

                                mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table properties at row: 2505854

                                then I use aquire the hierachyID for that row using SELECT * FROM properties LIMIT 2505854, 1 and exclude this in the dump query as follows, hierarchyid is 230503

                                mysqldump --user=root -p"$(cat /etc/mysql.secret)" kopano properties --where “hierarchyid!=230503” | gzip > dumpfilename_kopano_prop_170907_1.sql.gz

                                Result: mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table properties at row: 3796811

                                I query: SELECT * FROM properties LIMIT 3796811, 1
                                this call will come back with connection lost

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                                • mcostan
                                  mcostan last edited by

                                  it looks like a bad crash… I am sorry if you tried the possible highest innodb recovery options and you still get the corruption then I am afraid I am out of ideas.

                                  In general (once this is resolved) I would use a script (I think I found it previously on the zarafa forums or guides or something) that dumps the database every night automatically and keeps it for a number of days, you can run this twice a day (which I do).

                                  I also go one extreme further and turn off the whole thing during the night and take a dump of what’s in /var/lib/msyql + a copy of the entire VM that runs the database.

                                  The system is therefore down for like 30 minutes overnight.

                                  Perhaps a bit extreme, but the worse that can happen if everything is corrupted is that I lose 1/5 day of emails or at worse a day.

                                  fbartels 1 Reply Last reply Reply Quote 0
                                  • fbartels
                                    fbartels Kopano @mcostan last edited by

                                    @mcostan you should have a look at kopano-backup to complement your backup strategy.

                                    Regards Felix

                                    Resources:
                                    https://kopano.com/blog/how-to-get-kopano/
                                    https://documentation.kopano.io/
                                    https://kb.kopano.io/

                                    Support overview:
                                    https://kopano.com/support/

                                    1 Reply Last reply Reply Quote 0
                                    • mcostan
                                      mcostan last edited by

                                      @fbartels said in Damaged Kopano DB, partial restore with errors:

                                      kopano-backup

                                      thanks, I’ll have a look.

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                                      • olabre
                                        olabre last edited by

                                        well yes, the backup was next on our task list - the way is clear either VM snapshot or full backup or mysql dump - but we did not get that far

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