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Be more specific on detecting mysql socket #26

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Be more specific on detecting mysql socket #26

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Commits on Aug 1, 2020

  1. Be more specific on detecting mysql socket 

    The previous code enumerates lists both listening and connected sockets. The output of listening (-l) is enough for the intended purpose. Optimizing this.

Further on, it matches on the first socket which in my case was mysqlx.sock which leads later to a protocol error. More specific search string resolves this.

As on this situation:
# netstat -axn | grep mysql
unix  2      [ ACC ]     STREAM     LISTENING     1934165  /var/run/mysqld/mysqlx.sock
unix  2      [ ACC ]     STREAM     LISTENING     1934169  /var/run/mysqld/mysqld.sock
unix  3      [ ]         STREAM     CONNECTED     1934197  /var/run/mysqld/mysqld.sock
[...]

we had 
# netstat -axn | grep -m1 mysq
unix  2      [ ACC ]     STREAM     LISTENING     1934165  /var/run/mysqld/mysqlx.sock

and error
ERROR 2007 (HY000): Protocol mismatch; server version = 11, client version = 10

After the fix it finds the right socket:
# netstat -lxn | grep -m1 mysqld.sock
unix  2      [ ACC ]     STREAM     LISTENING     1934169  /var/run/mysqld/mysqld.sock
    @stephankn
    stephankn authored Aug 1, 2020
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