Jboss 为什么这条规则运行不止一次？

我创建了此规则：

rule "Product PRODUCT_A is not available from other insurers as INSURER_A"
when
    $p : Policy(insurer.name != "INSURER_A", product.name == "PRODUCT_A", $v : validations)
    not (Validation(level == ValidationLevel.ERROR) from $v)
then
    log.info("Matching rule for {} with validations: {}", $p.getInsurer().getName(), $p.getValidations());
    $p.addValidation(new Validation(ValidationLevel.ERROR, "This insurance is not available for " + $p.getInsurer().getName()));
end

当我注入4个保单对象时，所有的保单对象都是针对产品_A的，一个保单对象的保险人名称是保险人_A，另外三个保单对象的其他名称，日志显示：

DroolsController - Matching rule for INSURER_B with validations: []
DroolsController - Matching rule for INSURER_C with validations: [Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_B)]
DroolsController - Matching rule for INSURER_D with validations: [Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_B), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_C)]
DroolsController - Matching rule for INSURER_B with validations: [Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_D), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_B), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_C)]
DroolsController - Matching rule for INSURER_C with validations: [Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_D), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_B), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_C)]
DroolsController - Matching rule for INSURER_D with validations: [Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_D), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_B), Validation(id=0, level=ERROR, description=This insurance is not available for INSURER_C)]

我觉得这很奇怪。我希望在每一份保单上（保险公司除外）都有一个验证对象。但是，验证对象似乎已添加到所有策略对象中。当我读取结果时，每个验证对象都会添加到所有策略中，即使是在产品策略上

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我的规则怎么了？如何更改规则以使其按预期运行？

这与定义的规则无关

您输入的策略事实是克隆对象。然而，这是一个浅层克隆而不是深层克隆。因此，策略对象中的验证列表仍然指向克隆中的相同验证列表

向一个对象添加验证时，由于其他对象引用了相同的列表，因此也会将其添加到其他对象

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Drools首先创建一个包含所有条件的议程。当您修改对象时，它会发现该对象已更改，并相应地更新议程。但是，策略对象没有更改，因此即使引用的列表中有新的验证，规则也会运行。

如果不想多次执行规则，则可以从内存中“收回”事实。它将避免多次执行规则。

我确实希望规则执行多次，因为我正在向会话输入多个事实。当我收回这个事实时，我无法从会话中获取更新的信息，因为它已从工作内存中删除。