Highly sporadic hang, likely on SHOW CREATE SERVER

USE test;

INSTALL PLUGIN spider SONAME 'ha_spider.so';

CREATE USER spider@localhost IDENTIFIED BY '';

SHOW CREATE SERVER srv;

CREATE SERVER s3 FOREIGN DATA WRAPPER mysql OPTIONS (HOST 'localhost', PORT 3307);

SHOW CREATE SERVER srv;

SELECT * FROM mysql.servers;

ALTER SERVER s3 OPTIONS (HOST '192.168.0.3', PORT 3306);

CREATE OR REPLACE SERVER srv FOREIGN DATA WRAPPER foo OPTIONS (HOST "LOCALHOST", PORT "12345");

DROP SERVER s5000;

CREATE TABLE t1_s3 (c INT) ENGINE=Spider COMMENT='WRAPPER "mysql", SRV "s3", TABLE "t2"';

SHOW CREATE SERVER srv;