session: make unit test TestErrorRollback more stable (#6486)
session: make unit test TestErrorRollback more stable (#6486)


Nify/tidb,wusphinx/tidb,c4pt0r/tidb,cosmtrek/tidb,mccxj/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,ngaut/tidb,Nify/tidb,ming-relax/tidb,Cofyc/tidb,qiuyesuifeng/tidb,c4pt0r/tidb,mccxj/tidb,ngaut/tidb,coocood/tidb,coocood/tidb,kyle-wang/tidb,tiancaiamao/tidb,EvilMcJerkface/tidb,kyle-wang/tidb,c4pt0r/tidb,qiuyesuifeng/tidb,XuHuaiyu/tidb,tiancaiamao/tidb,ming-relax/tidb,Cofyc/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,cosmtrek/tidb,pingcap/tidb,pingcap/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,CodeRushing/tidb,EvilMcJerkface/tidb,pingcap/tidb,XuHuaiyu/tidb,CodeRushing/tidb,wusphinx/tidb,kyle-wang/tidb