com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session

Spring JIRA | Petar Tahchiev | 3 years ago
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  1. 0

    Hi guys, I'm using Spring Data Rest, version 1.1.0.M1 and it doesn't work because I have collections that are loaded lazily from my database, and instead of the real object, a proxy is returned and spring-data-rest throws this exception: {code} com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:131) at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728) at com.fasterxml.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:258) at com.fasterxml.jackson.core.JsonGenerator.writeObjectField(JsonGenerator.java:1110) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer$1.doWithPersistentProperty(PersistentEntityJackson2Module.java:323) at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:241) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:298) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:262) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:120) at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728) at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.java:194) at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:179) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:148) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:90) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:189) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69) at org.springframework.data.rest.webmvc.ResourceProcessorHandlerMethodReturnValueHandler.handleReturnValue(ResourceProcessorHandlerMethodReturnValueHandler.java:163) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:122) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) at javax.servlet.http.HttpServlet.service(HttpServlet.java:735) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:368) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:722) {code} What needs to be done is the spring-data should query for the inside a transaction, and should convert the product to json inside the same transaction. To me it seems like a bug, or at least like a really necessary improvement.

    Spring JIRA | 3 years ago | Petar Tahchiev
    com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session
  2. 0

    Hi guys, I'm using Spring Data Rest, version 1.1.0.M1 and it doesn't work because I have collections that are loaded lazily from my database, and instead of the real object, a proxy is returned and spring-data-rest throws this exception: {code} com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:131) at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728) at com.fasterxml.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:258) at com.fasterxml.jackson.core.JsonGenerator.writeObjectField(JsonGenerator.java:1110) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer$1.doWithPersistentProperty(PersistentEntityJackson2Module.java:323) at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:241) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:298) at org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:262) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:120) at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728) at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.java:194) at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:179) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:148) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:90) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:189) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69) at org.springframework.data.rest.webmvc.ResourceProcessorHandlerMethodReturnValueHandler.handleReturnValue(ResourceProcessorHandlerMethodReturnValueHandler.java:163) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:122) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) at javax.servlet.http.HttpServlet.service(HttpServlet.java:735) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:368) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:722) {code} What needs to be done is the spring-data should query for the inside a transaction, and should convert the product to json inside the same transaction. To me it seems like a bug, or at least like a really necessary improvement.

    Spring JIRA | 3 years ago | Petar Tahchiev
    com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session
  3. 0

    verify fails unless it is called after at least 1 second after the call.

    GitHub | 2 years ago | ftrofin
    com.fasterxml.jackson.databind.JsonMappingException: Conflicting getter definitions for property "not": org.mockserver.client.serialization.model.NotDTO#getNot(0 params) vs org.mockserver.client.serialization.model.NotDTO#isNot(0 params) (through reference chain: org.mockserver.client.serialization.model.ExpectationDTO["httpResponse"]->com.google.common.collect.TransformingRandomAccessList[0])
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  5. 0

    Infinite recursion error when using JaxbAnnotationIntrospector with JavaTypeXmlAdapter that does not change entity class.

    GitHub | 5 years ago | mosyda
    com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: test.jackson.Entity["relatedEntities"]->test.jackson.RelatedEntities["relatedEntity"])
  6. 0

    Spring Rest - Exception Producing Json Data

    Stack Overflow | 2 years ago | Damien Gallagher
    org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: com.test.domain.dao.CompanyVO_$$_jvstb99_6["handler"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: com.test.domain.dao.CompanyVO_$$_jvstb99_6["handler"])

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    Root Cause Analysis

    1. com.fasterxml.jackson.databind.JsonMappingException

      failed to lazily initialize a collection of role: com.xxxx.xxxx.core.model.catalog.ProductModel.name, could not initialize proxy - no Session

      at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue()
    2. Jackson
      ObjectMapper.writeValue
      1. com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:131)
      2. com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728)
      2 frames
    3. Jackson-core
      JsonGenerator.writeObjectField
      1. com.fasterxml.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:258)
      2. com.fasterxml.jackson.core.JsonGenerator.writeObjectField(JsonGenerator.java:1110)
      2 frames
    4. org.springframework.data
      PersistentEntityJackson2Module$ResourceSerializer$1.doWithPersistentProperty
      1. org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer$1.doWithPersistentProperty(PersistentEntityJackson2Module.java:323)
      1 frame
    5. Spring Data Core
      BasicPersistentEntity.doWithProperties
      1. org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:241)
      1 frame
    6. org.springframework.data
      PersistentEntityJackson2Module$ResourceSerializer.serialize
      1. org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:298)
      2. org.springframework.data.rest.repository.json.PersistentEntityJackson2Module$ResourceSerializer.serialize(PersistentEntityJackson2Module.java:262)
      2 frames
    7. Jackson
      ObjectMapper.writeValue
      1. com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:120)
      2. com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:1728)
      2 frames
    8. Spring
      AbstractHttpMessageConverter.write
      1. org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.java:194)
      2. org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:179)
      2 frames
    9. Spring MVC
      RequestResponseBodyMethodProcessor.handleReturnValue
      1. org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:148)
      2. org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:90)
      3. org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:189)
      3 frames
    10. Spring
      HandlerMethodReturnValueHandlerComposite.handleReturnValue
      1. org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69)
      1 frame
    11. Spring Data REST - WebMVC
      ResourceProcessorHandlerMethodReturnValueHandler.handleReturnValue
      1. org.springframework.data.rest.webmvc.ResourceProcessorHandlerMethodReturnValueHandler.handleReturnValue(ResourceProcessorHandlerMethodReturnValueHandler.java:163)
      1 frame
    12. Spring
      HandlerMethodReturnValueHandlerComposite.handleReturnValue
      1. org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:69)
      1 frame
    13. Spring MVC
      FrameworkServlet.doGet
      1. org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:122)
      2. org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
      3. org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
      4. org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
      5. org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
      6. org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
      7. org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
      8. org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
      8 frames
    14. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
      1 frame
    15. Spring MVC
      FrameworkServlet.service
      1. org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
      1 frame
    16. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
      1 frame
    17. Jetty
      AsyncHttpConnection.handle
      1. org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669)
      2. org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457)
      3. org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
      4. org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
      5. org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
      6. org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
      7. org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
      8. org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
      9. org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
      10. org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
      11. org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
      12. org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
      13. org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
      14. org.eclipse.jetty.server.Server.handle(Server.java:368)
      15. org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
      16. org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
      17. org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
      18. org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
      19. org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
      20. org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
      20 frames
    18. GWT dev
      SelectChannelEndPoint$1.run
      1. org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
      2. org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
      2 frames
    19. Jetty
      QueuedThreadPool$3.run
      1. org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
      2. org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
      2 frames
    20. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:722)
      1 frame