3 Replies Latest reply on Jul 4, 2014 12:57 AM by sfcoy

LazyInitializationException, JsonMappingException and org.jboss.resteasy.spi.WriterException on JBoss AS 7

icarusdb Jun 27, 2014 2:49 PM

HI all

well, this lazy exception I keep seeing since the very first time I started using codehous and json back in 2011/2012

two years later it keeps appearing

is this a REATEasy problem or is it a Hibernate problem ?

well, in between I think --> codehous serialization (maybe?)

this is the whole stacktrace

14:20:01,901 INFO [org.jboss.resteasy.cdi.CdiInjectorFactory] (http-localhost-127.0.0.1-8080-3) Found BeanManager at java:comp/BeanManager

14:20:01,905 INFO [org.jboss.resteasy.spi.ResteasyDeployment] (http-localhost-127.0.0.1-8080-3) Deploying javax.ws.rs.core.Application: class py.org.icarusdb.example.server.rest.JaxRsActivator$Proxy$_$$_WeldClientProxy

14:20:01,944 INFO [stdout] (http-localhost-127.0.0.1-8080-3) Hibernate: select country0_.id as id41_, country0_.active as active41_, country0_.continent_id as continent4_41_, country0_.name as name41_ from public.countries country0_ order by country0_.name asc

14:20:01,955 SEVERE [org.jboss.resteasy.core.SynchronousDispatcher] (http-localhost-127.0.0.1-8080-3) Failed executing GET /countries: org.jboss.resteasy.spi.WriterException: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: java.util.ArrayList[0]->py.org.icarusdb.example.server.model.Country["continent"]->py.org.icarusdb.example.server.model.Continent_$$_javassist_24["name"])

at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:262) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:585) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:506) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.2.Final.jar:]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]

at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) [weld-core-1.1.5.AS71.Final.jar:2012-02-10 15:31]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]

at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]

at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]

Caused by: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: java.util.ArrayList[0]->py.org.icarusdb.example.server.model.Country["continent"]->py.org.icarusdb.example.server.model.Continent_$$_javassist_24["name"])

at org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:218) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:183) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.SerializerBase.wrapAndThrow(SerializerBase.java:140) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:158) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:659) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.StdSerializerProvider.serializeValue(StdSerializerProvider.java:271) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ObjectWriter.writeValue(ObjectWriter.java:325) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.jaxrs.JacksonJsonProvider.writeTo(JacksonJsonProvider.java:556)

at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:100) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123) [resteasy-jaxrs-2.3.2.Final.jar:]

at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:250) [resteasy-jaxrs-2.3.2.Final.jar:]

... 24 more

Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session

at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:149) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:195) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]

at py.org.icarusdb.example.server.model.Continent_$$_javassist_24.getName(Continent_$$_javassist_24.java) [classes:]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_51]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_51]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_51]

at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_51]

at org.codehaus.jackson.map.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:483) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:418) [jackson-mapper-asl-1.9.2.jar:1.9.2]

at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150) [jackson-mapper-asl-1.9.2.jar:1.9.2]

... 39 more

I even add a library which is supposed to fix this error, but nothing happens

<groupId>com.fasterxml.jackson.datatype</groupId>

<artifactId>jackson-datatype-hibernate4</artifactId>

</dependency>

I assume that the problem is when @Produces(MediaType.APPLICATION_JSON) starts to work

but how do I intercept it ? so I can make the change on the ObjectMapper() has suggested by FasterXML ?

ObjectMapper mapper = new ObjectMapper();

// for Hibernate 4.x:

mapper.registerModule(new Hibernate4Module());

or do I have to wait for a fix ?

1. Re: LazyInitializationException, JsonMappingException and org.jboss.resteasy.spi.WriterException on JBoss AS 7

ctomc Jun 27, 2014 4:40 PM (in response to icarusdb)

     <dependency>

          <groupId>com.fasterxml.jackson.datatype</groupId>

          <artifactId>jackson-datatype-hibernate4</artifactId>

          <version>2.4.0</version>

        </dependency>

you are using jackson 2, AS7 by default uses jackson1 json provider.
so your annotations and whatnot from jackson2 might not be applied at all.

see Chapter 21. JSON Support via Jackson how to tell server to use jackson2 json provider.
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2. Re: LazyInitializationException, JsonMappingException and org.jboss.resteasy.spi.WriterException on JBoss AS 7

icarusdb Jun 30, 2014 10:08 AM (in response to ctomc)

well, I removed the dependency to go back to original resteasy implementation by default
this is the full stacktrace

09:02:54,833 INFO [org.jboss.resteasy.cdi.CdiInjectorFactory] (http-localhost-127.0.0.1-8080-1) Found BeanManager at java:comp/BeanManager
09:02:54,838 INFO [org.jboss.resteasy.spi.ResteasyDeployment] (http-localhost-127.0.0.1-8080-1) Deploying javax.ws.rs.core.Application: class py.org.icarusdb.example.server.rest.JaxRsActivator$Proxy$_$$_WeldClientProxy
09:02:55,022 INFO [stdout] (http-localhost-127.0.0.1-8080-1) Hibernate: select country0_.id as id2_, country0_.active as active2_, country0_.continent_id as continent4_2_, country0_.name as name2_ from public.countries country0_ order by country0_.name asc
09:02:55,292 GRAVE [org.jboss.resteasy.core.SynchronousDispatcher] (http-localhost-127.0.0.1-8080-1) Failed executing GET /countries/all: org.jboss.resteasy.spi.WriterException: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: java.util.ArrayList[0]->py.org.icarusdb.example.server.model.Country["continent"]->py.org.icarusdb.example.server.model.Continent_$$_javassist_4["name"])
    at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:262) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.writeJaxrsResponse(SynchronousDispatcher.java:585) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:506) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.2.Final.jar:]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
    at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) [weld-core-1.1.5.AS71.Final.jar:2012-02-10 15:31]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
    at java.lang.Thread.run(Thread.java:701) [rt.jar:1.6.0_31]
Caused by: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: java.util.ArrayList[0]->py.org.icarusdb.example.server.model.Country["continent"]->py.org.icarusdb.example.server.model.Continent_$$_javassist_4["name"])
    at org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:218) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:183) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.SerializerBase.wrapAndThrow(SerializerBase.java:140) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:158) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:72) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:23) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:659) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.StdSerializerProvider.serializeValue(StdSerializerProvider.java:271) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ObjectWriter.writeValue(ObjectWriter.java:325) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.jaxrs.JacksonJsonProvider.writeTo(JacksonJsonProvider.java:556)
    at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:117) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.write(GZIPEncodingInterceptor.java:100) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:123) [resteasy-jaxrs-2.3.2.Final.jar:]
    at org.jboss.resteasy.core.ServerResponse.writeTo(ServerResponse.java:250) [resteasy-jaxrs-2.3.2.Final.jar:]
    ... 24 more
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:149) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:195) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
    at py.org.icarusdb.example.server.model.Continent_$$_javassist_4.getName(Continent_$$_javassist_4.java) [classes:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.6.0_31]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.6.0_31]
    at java.lang.reflect.Method.invoke(Method.java:622) [rt.jar:1.6.0_31]
    at org.codehaus.jackson.map.ser.BeanPropertyWriter.get(BeanPropertyWriter.java:483) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:418) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    at org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150) [jackson-mapper-asl-1.9.2.jar:1.9.2]
    ... 39 more

my service is @RequestScoped
my repository is @RequestScoped

i don't want to make it @ApplicationScoped nor an @stateles ejb
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3. Re: LazyInitializationException, JsonMappingException and org.jboss.resteasy.spi.WriterException on JBoss AS 7

sfcoy Jul 4, 2014 12:57 AM (in response to icarusdb)

You need to modify your JPA query so that it does a "fetch join" to load the associated objects at the same time.
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