Flush logs hangs

We have a 3-node Galera cluster running with Mariadb "Server version: 10.1.22-MariaDB MariaDB Server" . running on Centos 7.

$ uname -a Linux xxxxxxxxxxxxxx 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

When I issue a "flush logs" the statement hangs.

$ mysql -umysql_admin -p* -e 'show processlist' +---------+-------------+-----------------------+------+---------+---------+--------------------+------------------+----------+


+---------+-------------+-----------------------+------+---------+---------+--------------------+------------------+----------+ ...

1593327mysql_adminlocalhostNULLQuery2748initflush logs0.000

... +---------+-------------+-----------------------+------+---------+---------+--------------------+------------------+----------+

I can't find any reason why this happens. All filesystems have enough space.

Any ideas what can cause this?


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