The meaning of NoInitialContextException error

Question

I am writing a client for my EJB and when trying to execute it  I get the following exception       javax naming NoInitialContextException  Need to specify class name   in environment or system property  or as an applet parameter  or in an   application resource file    I just can t understand what the problem is

User · Answer

You should set jndi properties  I ve given below some piece of code that explain how the properties are set for activemq  Like that you can set for your application  Inside a J2EE container like JBoss no need to set these properties   Properties props   new Properties    props setProperty Context INITIAL CONTEXT FACTORY  org apache activemq jndi ActiveMQInitialContextFactory    props setProperty Context PROVIDER URL  tcp   localhost 61616    InitialContext ctx   new InitialContext props      get the initial context    InitialContext ctx   new InitialContext    QueueConnectionFactory connFactory    QueueConnectionFactory  ctx lookup  ConnectionFactory               create a queue connection QueueConnection queueConn   connFactory createQueueConnection       queueConn start       lookup the queue object Queue queue    Queue  ctx lookup  dynamicQueues Payment Check        I know this is a late answer  but just giving for future reference

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you need to put the following name value pairs into a hash table and call this constructor   public InitialContext Hashtable lt     gt  environment    the exact values depend on your application server  this example is for jboss  jndi java naming provider url jnp   localhost 1099  jndi java naming factory url org jboss naming org jnp interfaces jndi java naming factory initial org jnp interfaces NamingContextFactory

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The javax naming package comprises the JNDI API  Since it s just an API  rather than an implementation  you need to tell it which implementation of JNDI to use  The implementations are typically specific to the server you re trying to talk to   To specify an implementation  you pass in a Properties object when you construct the InitialContext  These properties specify the implementation to use  as well as the location of the server  The default InitialContext constructor is only useful when there are system properties present  but the properties are the same as if you passed them in manually   As to which properties you need to set  that depends on your server  You need to hunt those settings down and plug them in

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Do this   Properties props   new Properties    props setProperty Context INITIAL CONTEXT FACTORY   com sun enterprise naming SerialInitContextFactory    Context initialContext   new InitialContext props     Also add this to the libraries of the project   C  installs glassfish glassfish-4 1 glassfish lib gf-client jar adjust path accordingly

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I solved the same problem by adding the following Jar libraries to my project    appserv-rt jar javaee jar   from the folder   C  Program Files glassfish-4 0 glassfish lib  The links to these libraries were broken and Netbeans didn t found the right classes to use

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make sure dependencies for jetty naming and jetty plus are included  not just provided scope    This fixed it for me

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you need to use jboss-client jar in your client project and you need to use jnp-client jar in your ejb project

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Is a JNDI problem  You will see that exception if the InitialContext class has neither default properties for the JNDI service provider nor explicitly configured server properties   Set the Context INITIAL CONTEXT FACTORY environment property to the class name of the initial context implementation that you are using  This class must be available to your program in the classpath   Check    http   docs oracle com javase 7 docs api javax naming InitialContext html http   java sun com products jndi tutorial getStarted TOC html   runtime problems

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Specifically  I got this issue when attempting to retrieve the default  no-args  InitialContext within an embedded Tomcat7 instance  in SpringBoot   The solution for me  was to tell Tomcat to enableNaming   i e    Bean public TomcatEmbeddedServletContainerFactory tomcatFactory         return new TomcatEmbeddedServletContainerFactory              Override         protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer                  Tomcat tomcat                tomcat enableNaming                return super getTomcatEmbeddedServletContainer tomcat

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My problem with this one was that I was creating a hibernate session  but had the JNDI settings for my database instance wrong because of a classpath problem  Just FYI

User · Answer

Easy  amp  configurable solution is create one jndi properties file and put this file in classpath  jndi properties can be created as  java naming factory initial   org apache activemq jndi ActiveMQInitialContextFactory    use the following property to configure the default connector java naming provider url   vm   localhost    use the following property to specify the JNDI name the connection factory   should appear as    connectionFactoryNames   connectionFactory  queueConnectionFactory  topicConnectionFactry    register some queues in JNDI using the form   queue  jndiName     physicalName  queue MyQueue   example MyQueue     register some topics in JNDI using the form   topic  jndiName     physicalName  topic MyTopic   example MyTopic   Just specify your naming factory  amp  url and put this file in your classpath  JMS will fetch required info by itself and it s easily configurable in future also

User · Answer

Most of the time these settings are also defined in a jndi properties file  Do you have that one lying around somewhere

[java] The meaning of NoInitialContextException error

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