NullPointerException in JAXBContext.newInstance()

Question

Java developer here. I am using JAXB to create bind objects. When I attempt to create a JAXBContext like this:

JAXBContext.newInstance("com.mycompany.jaxb.pkg1:com.mycompany.jaxb.pkg2");

I get a NullPointerException:

Exception in thread "main" java.lang.NullPointerException
    at com.sun.xml.bind.v2.model.impl.PropertyInfoImpl.calcXmlName(PropertyInfoImpl.java:287)
    at com.sun.xml.bind.v2.model.impl.PropertyInfoImpl.calcXmlName(PropertyInfoImpl.java:260)
    at com.sun.xml.bind.v2.model.impl.ElementPropertyInfoImpl.getTypes(ElementPropertyInfoImpl.java:100)
    at com.sun.xml.bind.v2.model.impl.RuntimeElementPropertyInfoImpl.getTypes(RuntimeElementPropertyInfoImpl.java:50)
    at com.sun.xml.bind.v2.model.impl.ElementPropertyInfoImpl$1.size(ElementPropertyInfoImpl.java:42)
    at java.util.AbstractList$Itr.hasNext(AbstractList.java:416)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:139)
    at com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:49)
    at com.sun.xml.bind.v2.model.impl.RuntimeModelBuilder.getClassInfo(RuntimeModelBuilder.java:41)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:189)
    at com.sun.xml.bind.v2.model.impl.RegistryInfoImpl.<init>(RegistryInfoImpl.java:63)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.addRegistry(ModelBuilder.java:232)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:201)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl$3.run(JAXBContextImpl.java:357)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl$3.run(JAXBContextImpl.java:351)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:350)
    at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:216)
    at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:76)
    at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:55)
    at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:592)
    at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:132)
    at javax.xml.bind.ContextFinder.find(ContextFinder.java:286)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:372)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:337)
    at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:244)
    at com.mycompany.jaxb.JAXBContextFactory.initIfNeeded(JAXBContextFactory.java:66)

Googling for the relevant keywords led me to several discussion threads saying that this is a known bug and I should upgrade to version 2.0.3. But here is my maven POM file:

<dependency>
  <groupId>com.sun.xml.bind</groupId>
  <artifactId>jaxb-impl</artifactId>
  <version>2.2.1</version>
</dependency>
<dependency>
  <groupId>javax.xml.bind</groupId>
  <artifactId>jaxb-api</artifactId>
  <version>2.1</version>
</dependency>

...as you can see, I am already beyond version 2.0.3. (And yes, I tried rolling back to the old version; it didn't help.)

Has anyone seen this for a reason OTHER than version 2.0.2 or older, or does anyone have pointers for how to go about tracking down the problem?

What version of java are you using? – skaffman Dec 30 '10 at 22:18 — skaffman, Dec 30 '10 at 22:18
This solved the same error I was getting. Thanks a lot :) – moshfiqur Aug 09 '12 at 15:10 — moshfiqur, Aug 09 '12 at 15:10

score 2 · Accepted Answer · answered Dec 31 '10 at 14:11

2

Okay, for the record: I found the solution.

As several threads had suggested, the source of this bug was using a version of JAXB which was older than 2.0.2. My error was that my maven POM file was being overridden by another POM file which was importing an older version of the library.

Thanks to skaffman, and everyone else who took a look.

answered Dec 31 '10 at 14:11

mcherm

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Hi, can you please check https://stackoverflow.com/questions/71413014/nullpointerexception-during-jaxbcontext-newinstancecontextpath-jakarta-xml-b ? I am also facing nullpointer while trying to create JAXBContext.newInstance , but not finding any clue as of now. – Sash_KP Mar 09 '22 at 17:13

NullPointerException in JAXBContext.newInstance()

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