我在 github 上使用了委托身份提供商，它运行正常，并在 cas 中成功授权了我的帐户。
2024-03-26 15:05:02,752 ERROR
[org.apereo.cas.util.serialization.AbstractJacksonBackedStringSerializer] - <Cannot read/parse [{"@class":"org.apereo.cas.ticket.TicketGrantingTicketImpl","@id":1,"id":"TGT-1-********qFm6SjQ17y...] to deserialize into type [class org.apereo.cas.ticket.TicketGrantingTicketImpl]. This may be caused in the absence of a configuration/support module that knows how to interpret the fragment, specially if the fragment describes a CAS registered service definition. Internal parsing error is [Cannot construct instance of `org.pac4j.oauth.credentials.OAuth20Credentials` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 2090] (through reference chain: org.apereo.cas.ticket.TicketGrantingTicketImpl["authentication"]->org.apereo.cas.authentication.DefaultAuthentication["credentials"]->java.util.ArrayList[0]->org.apereo.cas.authentication.principal.ClientCredential["credentials"])]>
2024-03-26 15:05:02,758 ERROR [org.apereo.cas.ticket.registry.DefaultTicketRegistryCleaner] - <INVALID_TICKET
DefaultTicketStringSerializationManager.java:deserializeTicket:60
DefaultTicketStringSerializationManager.java:lambda$deserializeTicket$1:49
Unchecked.java:lambda$supplier$38:1695
>
2024-03-26 15:05:52,249 INFO [org.apereo.cas.services.mgmt.AbstractServicesManager] - <Loaded [2] service(s) from [EmbeddedResourceBasedServiceRegistry].>
2024-03-26 15:06:35,242 ERROR [org.apereo.cas.util.serialization.AbstractJacksonBackedStringSerializer] - <Cannot read/parse [{"@class":"org.apereo.cas.ticket.TicketGrantingTicketImpl","@id":1,"id":"TGT-1-********qFm6SjQ17y...] to deserialize into type [class org.apereo.cas.ticket.TicketGrantingTicketImpl]. This may be caused in the absence of a configuration/support module that knows how to interpret the fragment, specially if the fragment describes a CAS registered service definition. Internal parsing error is [Cannot construct instance of `org.pac4j.oauth.credentials.OAuth20Credentials` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 2090] (through reference chain: org.apereo.cas.ticket.TicketGrantingTicketImpl["authentication"]->org.apereo.cas.authentication.DefaultAuthentication["credentials"]->java.util.ArrayList[0]->org.apereo.cas.authentication.principal.ClientCredential["credentials"])]>
2024-03-26 15:06:35,342 ERROR [org.apereo.cas.util.serialization.AbstractJacksonBackedStringSerializer] - <Cannot read/parse [{"@class":"org.apereo.cas.ticket.TicketGrantingTicketImpl","@id":1,"id":"TGT-1-********qFm6SjQ17y...] to deserialize into type [class org.apereo.cas.ticket.TicketGrantingTicketImpl]. This may be caused in the absence of a configuration/support module that knows how to interpret the fragment, specially if the fragment describes a CAS registered service definition. Internal parsing error is [Cannot construct instance of `org.pac4j.oauth.credentials.OAuth20Credentials` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 2090] (through reference chain: org.apereo.cas.ticket.TicketGrantingTicketImpl["authentication"]->org.apereo.cas.authentication.DefaultAuthentication["credentials"]->java.util.ArrayList[0]->org.apereo.cas.authentication.principal.ClientCredential["credentials"])]>
2024-03-26 15:06:35,353 ERROR [org.apereo.cas.util.serialization.AbstractJacksonBackedStringSerializer] - <Cannot read/parse [{"@class":"org.apereo.cas.ticket.TicketGrantingTicketImpl","@id":1,"id":"TGT-1-********qFm6SjQ17y...] to deserialize into type [class org.apereo.cas.ticket.TicketGrantingTicketImpl]. This may be caused in the absence of a configuration/support module that knows how to interpret the fragment, specially if the fragment describes a CAS registered service definition. Internal parsing error is [Cannot construct instance of `org.pac4j.oauth.credentials.OAuth20Credentials` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 2090] (through reference chain: org.apereo.cas.ticket.TicketGrantingTicketImpl["authentication"]->org.apereo.cas.authentication.DefaultAuthentication["credentials"]->java.util.ArrayList[0]->org.apereo.cas.authentication.principal.ClientCredential["credentials"])]>
2024-03-26 15:06:52,256 INFO [org.apereo.cas.services.mgmt.AbstractServicesManager] - <Loaded [2] service(s) from [EmbeddedResourceBasedServiceRegistry].>
但是控制台日志出现了如下问题（门票注册到redis）
如何解决
根本原因似乎是无法反序列化 OAuth20Credentials，因为缺少 Jackson 可以用来从 JSON 数据实例化对象的正确构造函数或工厂方法。此问题可能由 CAS 设置中的多个潜在配置或实现细节引起，特别是与您如何与委托身份提供商（在您的情况下为 GitHub）集成以及票证存储在 Redis 中时如何序列化/反序列化有关。
试试这个
1. Verify Configuration for OAuth20Credentials:
• Ensure that the OAuth20Credentials class has a no-arguments constructor or a @JsonCreator annotated factory method that Jackson can use for deserialization. If it’s missing, you’ll need to add one.
2. Review Custom Serialization/Deserialization Modules:
• If you have custom serialization or deserialization modules for handling CAS or pac4j objects, ensure they are correctly registered and capable of handling OAuth20Credentials.
3. Check CAS Module Inclusions:
• Confirm that all necessary CAS modules, especially those related to OAuth support and ticket serialization, are included in your project dependencies. Missing modules can lead to deserialization issues.