手动清空jbpm3.2中数据库的表，有限表之间的关联，无法删除，以下是我记录清空数据表的先后顺序，在这记录下：

delete from jbpm_log;

delete from jbpm_variableinstance;

delete from jbpm_taskinstance;

delete from jbpm_tokenvariablemap;

delete from jbpm_moduleinstance;