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      We have a server running several processes of Mariadb (10.0.22) and tables running tokudb engine (tokudb-7.5.7) replicating from a master in a normal master-slave setup.

      We realised that one of the proceses was lagging a lot found a query that was stuck. The process was completely stuck (stop slave didn't even work, it was just hanging trying to kill the replication thread). The only solution was to kill -9 mysqld.

      After migrating the table to InnoDB the problem looks gone.
      The full bug report is here: https://bugs.launchpad.net/percona-server/+bug/1621852 but Percona also suggested to get this opened here as it might be something between MariaDB and TokuDB plugin.

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            • Assignee:
              plinux Lixun Peng
              Reporter:
              marostegui Manuel Arostegui
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