hrift does not support polymorphic data types
Exception in thread "main" com.facebook.swift.codec.metadata.MetadataErrorException: Error: Metadata extraction encountered 1 errors and 0 warnings at com.facebook.swift.codec.metadata.MetadataErrors.throwIfHasErrors(MetadataErrors.java:73) at com.facebook.swift.codec.metadata.ThriftStructMetadataBuilder.build(ThriftStructMetadataBuilder.java:99) at com.facebook.swift.codec.metadata.ThriftCatalog.extractThriftStructMetadata(ThriftCatalog.java:502) at com.facebook.swift.codec.metadata.ThriftCatalog.getThriftStructMetadata(ThriftCatalog.java:367) at com.facebook.swift.codec.metadata.ThriftCatalog.getThriftType(ThriftCatalog.java:259) at com.facebook.swift.service.metadata.ThriftMethodMetadata.<init>(ThriftMethodMetadata.java:124) at com.facebook.swift.service.metadata.ThriftServiceMetadata.<init>(ThriftServiceMetadata.java:73) at com.facebook.swift.service.ThriftServiceProcessor.<init>(ThriftServiceProcessor.java:79) at com.facebook.swift.service.ThriftServiceProcessor.<init>(ThriftServiceProcessor.java:68) at com.stono.thrift.annotation.server.ServerMain.main(ServerMain.java:15) Suppressed: com.facebook.swift.codec.metadata.MetadataErrorException: Error: ThriftStruct class 'com.stono.thrift.annotation.server.User' is not final (thrift does not support polymorphic data types) at com.facebook.swift.codec.metadata.MetadataErrors.addError(MetadataErrors.java:95) at com.facebook.swift.codec.metadata.AbstractThriftMetadataBuilder.verifyClass(AbstractThriftMetadataBuilder.java:181) at com.facebook.swift.codec.metadata.ThriftStructMetadataBuilder.<init>(ThriftStructMetadataBuilder.java:45) at com.facebook.swift.codec.metadata.ThriftCatalog.extractThriftStructMetadata(ThriftCatalog.java:501) ... 7 more
如果出现这样的错误，是没有在类上面添加final修饰；