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  1. MariaDB Server
  2. MDEV-14123

.rocksdb folder may break workflow which re-create data directory

Details

    Description

      I did see many workflows/scripts which re-create data directory with commands like:

      sudo rm -rf /var/lib/mysql/*
      		 
      sudo mysql_install_db

      OR :

      sudo rm -rf /var/lib/mysql/*
      		 
      cp -R /backup-location/* /var/lib/mysql/

      The rm command will not clean up eventual .rocksdb folder, which may cause errors in new instance like:

      2017-10-25 10:12:40 139671395502272 [Warning] RocksDB: Schema mismatch - Table d9.b is registered in RocksDB but does not have a .frm file
      		 
      2017-10-25 10:12:40 139671395502272 [ERROR] RocksDB: Problems validating data dictionary against .frm files, exiting
      		 
      2017-10-25 10:12:40 139671395502272 [ERROR] RocksDB: Failed to initialize DDL manager.
      		 
      2017-10-25 10:12:40 139671395502272 [ERROR] Plugin 'ROCKSDB' init function returned error.
      		 
      2017-10-25 10:12:40 139671395502272 [ERROR] Plugin 'ROCKSDB' registration as a STORAGE ENGINE failed.

      Attachments

        Issue Links

          duplicates

          Task - A task that needs to be done. MDEV-12791 Default value of rocksdb_datadir not ideal

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-12451 SHOW DATABASES shows #mysql50#.rocksdb

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-13505 mysql_upgrade failed with rocksdb

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-14461 Connect + RocksDB

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Activity

            Ascending order - Click to sort in descending order
            elenst Elena Stepanova added a comment -

            This folder causes problems on many levels (I've linked a couple of open issues). They must be solved somehow before MyRocks goes GA.

            elenst Elena Stepanova added a comment - This folder causes problems on many levels (I've linked a couple of open issues). They must be solved somehow before MyRocks goes GA.
            psergei Sergei Petrunia added a comment -

            Changing its name is a question of changing the default value of rocksdb_datadir.

            Trying to change to #rocksdb.
            I still get "unknown database" in SHOW DATABASES:

            MariaDB [(none)]> show databases;
            		 
            +--------------------+
            		 
            | Database           |
            		 
            +--------------------+
            		 
            | #mysql50##rocksdb  |
            		 
            | information_schema |

            psergei Sergei Petrunia added a comment - Changing its name is a question of changing the default value of rocksdb_datadir . Trying to change to #rocksdb . I still get "unknown database" in SHOW DATABASES: MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | #mysql50##rocksdb | | information_schema |
            psergei Sergei Petrunia added a comment -

            Renamed the folder to #rocksdb.

            psergei Sergei Petrunia added a comment - Renamed the folder to #rocksdb.

            People

              psergei Sergei Petrunia
              anikitin Andrii Nikitin (Inactive)
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                Created:
                Updated:
                Resolved:

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