5

当一个人测试系统时，不会发生这些错误。但是通过 jmeter 测试，我可以非常可靠地重现一些错误，例如：

ActiveRecord::JDBCError: SAVEPOINT active_record_1 does not exist: ROLLBACK TO SAVEPOINT active_record_1

Stack:

    gems/gems/activerecord-3.0.10/lib/active_record/connection_adapters/abstract_adapter.rb:207:in `log'
    gems/gems/activerecord-3.0.10/lib/active_record/connection_adapters/abstract_adapter.rb:200:in `log'
    gems/gems/activerecord-jdbc-adapter-1.2.1/lib/arjdbc/jdbc/adapter.rb:208:in `execute'
    gems/gems/activerecord-jdbc-adapter-1.2.1/lib/arjdbc/mysql/adapter.rb:156:in `rollback_to_savepoint'
    gems/gems/activerecord-3.0.10/lib/active_record/connection_adapters/abstract/database_statements.rb:179:in `transaction'
    gems/gems/activerecord-3.0.10/lib/active_record/connection_adapters/abstract/database_statements.rb:171:in `transaction'
    gems/gems/activerecord-3.0.10/lib/active_record/transactions.rb:207:in `transaction'
    gems/gems/activerecord-3.0.10/lib/active_record/transactions.rb:290:in `with_transaction_returning_status'
    gems/gems/activerecord-3.0.10/lib/active_record/transactions.rb:240:in `save'
    gems/gems/activerecord-3.0.10/lib/active_record/transactions.rb:251:in `rollback_active_record_state!'
    gems/gems/activerecord-3.0.10/lib/active_record/transactions.rb:239:in `save'
    ...(our code that simply calls save on a new instance of a model class)...

我们没有嵌套事务，甚至没有明确地使用它们。我发现围绕此错误消息的一个现有错误，但它不相关；我们不会截断或做任何 DDL 工作。只需创建记录并保存即可。

我们使用 Rails 3.0.10、JRuby 1.6.5、activerecord-jdbcmysql-adapter、Warbler 1.3.2 并通过 Elastic Beanstalk 部署在具有单个 Mysql 实例 v5.1.57 的 64 位 Tomcat 7/Amazon RDS 上。我们为 config.threadsafe 做好了准备！- 这感觉就像是 ActiveRecord 内部的某种竞赛 - 但是 ActiveRecord 应该在线程安全中工作，不是吗？

最后一点：我担心这是一个 JRuby 或 Warbler 问题，因为如果我们从 JRuby 切换到 MRI Ruby 1.9，我们将无法重现这个问题。

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1 回答 1

1

It could be related to this commit, which was introduced in 1.2.1. Does 1.2.0 give you the same issue?

Maybe I need to reintroduce some error checking for transactions supported vs. failed transaction. Care to file a bug at https://github.com/jruby/activerecord-jdbc-adapter/issues? Thanks.

于 2011-12-08T16:29:32.887 回答