java.lang.NullPointerException when using XHR request

[cyf992002]

When I use XMLHttpRequest object to request http://a:a@15.19.249.25:8080/db/_schemas/Organization, I sometimes get NullPointerException in the response. { "_exceptions": [ { "exception": "java.lang.NullPointerException" } ], "http status code": 500, "http status description": "Internal Server Error", "message": "Error handling the request, see log for more information" }

Here's log I captured java.lang.NullPointerException: null at org.restheart.handlers.schema.JsonSchemaTransformer.unescapeSchema(JsonSchemaTransformer.java:160) at org.restheart.handlers.schema.JsonSchemaTransformer.transform(JsonSchemaTransformer.java:57) at org.restheart.handlers.metadata.TransformerHandler.lambda$transform$0(TransformerHandler.java:93) at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) at java.util.stream.ReferencePipeline$Head.forEachOrdered(ReferencePipeline.java:590) at org.restheart.handlers.metadata.TransformerHandler.transform(TransformerHandler.java:92) at org.restheart.handlers.metadata.TransformerHandler.handleRequest(TransformerHandler.java:69) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.document.GetDocumentHandler.handleRequest(GetDocumentHandler.java:170) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.metadata.AbstractTransformerMetadataHandler.handleRequest(AbstractTransformerMetadataHandler.java:63) at org.restheart.handlers.RequestDispacherHandler.handleRequest(RequestDispacherHandler.java:468) at org.restheart.handlers.injectors.CollectionPropsInjectorHandler.handleRequest(CollectionPropsInjectorHandler.java:98) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.injectors.DbPropsInjectorHandler.handleRequest(DbPropsInjectorHandler.java:92) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.injectors.AccountInjectorHandler.handleRequest(AccountInjectorHandler.java:56) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.AccessManagerHandler.handleRequest(AccessManagerHandler.java:55) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.AuthTokenInjecterHandler.handleRequest(AuthTokenInjecterHandler.java:70) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.AuthenticationCallHandler.handleRequest(AuthenticationCallHandler.java:54) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:55) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:61) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:85) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.SecurityHandler.handleRequest(SecurityHandler.java:50) at org.restheart.security.handlers.SecurityHandlerDispacher.handleRequest(SecurityHandlerDispacher.java:60) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.injectors.BodyInjectorHandler.handleRequest(BodyInjectorHandler.java:109) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.OptionsHandler.handleRequest(OptionsHandler.java:58) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.handlers.injectors.RequestContextInjectorHandler.handleRequest(RequestContextInjectorHandler.java:647) at org.restheart.handlers.PipedHttpHandler.next(PipedHttpHandler.java:136) at org.restheart.security.handlers.CORSHandler.handleRequest(CORSHandler.java:88) at org.restheart.handlers.RequestLoggerHandler.handleRequest(RequestLoggerHandler.java:87) at org.restheart.handlers.PipedHttpHandler.handleRequest(PipedHttpHandler.java:89) at io.undertow.server.handlers.PathHandler.handleRequest(PathHandler.java:94) at io.undertow.server.handlers.HttpContinueAcceptingHandler.handleRequest(HttpContinueAcceptingHandler.java:78) at org.restheart.handlers.ErrorHandler.handleRequest(ErrorHandler.java:69) at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72) at org.restheart.handlers.GzipEncodingHandler.handleRequest(GzipEncodingHandler.java:74) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:210) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:809) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)

[ujibang]

yep this is a known bug fixed in 3.1.0-SNAPSHOT

can you try with latest release?

[mkjsix]

@ujibang shall we try to issue a 3.0.2 with a fix for this or we'll leave it to a 3.1.0 only?

[cyf992002]

@ujibang Thanks for your response, I tried 3.1.0-SNAPSHOT just now, same error.

[mkjsix]

@ujibang the commit is tiny, I think I'll cherry-pick it into the 3.0.x branch and release a 3.0.2 stable

[ujibang]

ok I have added a check to avoid the NullPointerException

can you try with latest SNAPSHOT? hit get it from sonatype

[cyf992002]

Thanks @ujibang, I can see it has been fixed, but a new issue comes up, when I try to post a request with following url http://a:a@15.19.249.25:8080/db/Organization to create a record, I got following error: Response: { "_warnings": "error applying checker: wrong configuration for metadata-named-singletons; interface class org.restheart.hal.metadata.singletons.Checker not found" "http status code": 400 "http status description": "Bad Request" "message": "request check failed" } but it works ok on 3.0.1 release

[ujibang]

Yep we reactors packages in 3.1 so you need to update the configuration file where checkers, transformers and hooks are defined. Here the class names are changed

[cyf992002]

Close issue, thanks everyone.