DBD::mysql::db do failed: Table cl_access was locked with a READ lock and can't be updated

DBD::mysql::db do failed: Table 'acl_access' was locked with a READ lock and can't be updated at /usr/bin/mysqlhotcopy line 483.
Locked 448 tables in 0 seconds.

mysql5.1升级至5.5之后，mysqlhotcopy备份抛出如下错误！

DBD::mysql::db do failed: Table 'acl_access' was locked with a READ lock and can't be updated at /usr/bin/mysqlhotcopy line 483.
Locked 448 tables in 0 seconds.

因为5.5对lock语法进行了修改，而mysqlhotcopy使用的是原来的老语法，导致不能使用，升级mysqlhotcopy,即从mysql5.5 bin目录中，将mysqlhotcopy替换原来的mysqlhotcopy程序！