I applied all changes from the issue and it's really better now. Could you please check another interesting case? It seems there is some bug related to swagger procs execution.

another problem, if you change the endpoint which I used above to use secured http without any security domains:

NPE in Swagger translator ------------------------- Key: TEIID-5183 URL: https://issues.jboss.org/browse/TEIID-5183 Project: Teiid Issue Type: Bug Components: Misc. Connectors Affects Versions: 9.3.4 Environment: teiid-9.3.4 on WildFly Full 10.0.0.Final (WildFly Core 2.0.10.Final) Reporter: dalex dalex Assignee: Steven Hawkins Fix For: 10.1, 9.3.6, 10.0.2 Attachments: swagger_null_values.jpg When using the http://api.apis.guru/v2/specs/azure.com/redis/2017-10-01/ link as an endpoint for swagger resource adapter Teiid throws up the following error message (in bootstrapping phase), though with http://petstore.swagger.io/v2 endpoint according to the https://teiid.gitbooks.io/documents/reference/Swagger_Translator.html documentation the translator works: {code:noformat} 2017-12-18 16:14:43,975 WARN [org.teiid.RUNTIME] (Worker1_async-teiid-threads1) TEIID50036 VDB test.1 model "mswagger" metadata failed to load. Reason:java.lang.NullPointerExceptio n: java.lang.NullPointerException at org.teiid.metadata.MetadataFactory.setUUID(MetadataFactory.java:155) at org.teiid.metadata.MetadataFactory.addProcedureParameter(MetadataFactory.java:421) at org.teiid.translator.swagger.SwaggerMetadataProcessor.addProcedureParameters(SwaggerMetadataProcessor.java:560) at org.teiid.translator.swagger.SwaggerMetadataProcessor.addProcedure(SwaggerMetadataProcessor.java:261) at org.teiid.translator.swagger.SwaggerMetadataProcessor.process(SwaggerMetadataProcessor.java:206) at org.teiid.translator.swagger.SwaggerMetadataProcessor.process(SwaggerMetadataProcessor.java:74) at org.teiid.translator.ExecutionFactory.getMetadata(ExecutionFactory.java:961) at org.teiid.query.metadata.NativeMetadataRepository.getMetadata(NativeMetadataRepository.java:96) at org.teiid.query.metadata.NativeMetadataRepository.loadMetadata(NativeMetadataRepository.java:62) at org.teiid.query.metadata.ChainingMetadataRepository.loadMetadata(ChainingMetadataRepository.java:55) at org.teiid.jboss.VDBService$6.run(VDBService.java:341) at org.teiid.jboss.VDBService$7.run(VDBService.java:392) at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:284) at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) {code} The http://api.apis.guru/v2/specs/azure.com/redis/2017-10-01/ endpoint supports swagger API according to the https://apis.guru/browse-apis/ link and I can see json output when requesting the http://api.apis.guru/v2/specs/azure.com/redis/2017-10-01/swagger.json link. Probably the NPE appears because of RefParameter type which is not handled in SwaggerMetadataProcessor.addProcedureParameters method which leads to name = null.