由于这个原因，您应该将' FOR FETCH ONLY '子句加在不会成为更新目标的查询的后面，或者使用' BLOCKING ALL '作为应用程序的一个绑定选项。
For this reason, you should append a 'for FETCH ONLY' clause to those queries that will not be update targets, or use 'BLOCKING ALL' as one bind option for your application.
虽然XKMS使用的密钥绑定信息没有寿命，但是底层pki颁发的凭证偶尔也会有这么一段时间，过了这段时间之后就要周期性地更新。
While there is no lifespan for the key binding information used by XKMS, the credentials issued by the underlying PKI occasionally do have a time span that must be renewed periodically.
如果绑定信息变化了，那么一旦无法获得或使用服务，客户机就会返回到注册中心以更新这一信息。
If the binding information changes, failure to acquire and use the service should cause clients to return to the registry to refresh this information.
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