There is no restriction and no need to stop triggers for executing the service registration.
However, please note that the contents of the execution may change depending on the service registration timing as described in the following FAQ in our technical support service site.
Please note that OutOfMemoryError: Metaspace may occur because the usage of Metaspace, which is a Java memory area, increases due to changes and additions to registered services.
Please check the following FAQ for the above error.
[DataSpider Servista] An error occurs upon a script execution or DataSpider Studio will not connect.