Gettting Null Pointer Exception

[mahimaAgg]

Error visiting a Java source file

- org.walkmod.util.location.LocationImpl@76464
795
        at org.walkmod.javalang.walkers.DefaultJavaWalker.visit(DefaultJavaWalke
r.java:505)
        at org.walkmod.javalang.walkers.DefaultJavaWalker.visit(DefaultJavaWalke
r.java:250)
        at org.walkmod.javalang.walkers.DefaultJavaWalker.accept(DefaultJavaWalk
er.java:91)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.walkmod.walkers.AbstractWalker.walk(AbstractWalker.java:264)
        at org.walkmod.walkers.AbstractWalker.execute(AbstractWalker.java:279)
        at org.walkmod.javalang.walkers.DefaultJavaWalker.execute(DefaultJavaWal
ker.java:173)
        at org.walkmod.impl.DefaultChainWalkerInvocation.invoke(DefaultChainWalk
erInvocation.java:41)
        at org.walkmod.impl.DefaultChainInvocation.invoke(DefaultChainInvocation
.java:38)
        at org.walkmod.impl.DefaultChainAdapter.execute(DefaultChainAdapter.java
:166)
        at org.walkmod.conf.entities.impl.ConfigurationImpl.executeChain(Configu
rationImpl.java:731)
        at org.walkmod.conf.entities.impl.ConfigurationImpl.execute(Configuratio
nImpl.java:825)
        at org.walkmod.WalkModFacade.run(WalkModFacade.java:284)
        at org.walkmod.WalkModFacade.apply(WalkModFacade.java:142)
        at org.walkmod.commands.ApplyCommand.execute(ApplyCommand.java:42)
        at org.walkmod.WalkModDispatcher.execute(WalkModDispatcher.java:172)
        at org.walkmod.WalkModDispatcher.main(WalkModDispatcher.java:197)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.walkmod.walkers.AbstractWalker.visit(AbstractWalker.java:123)
        at org.walkmod.walkers.AbstractWalker.visit(AbstractWalker.java:171)
        at org.walkmod.javalang.walkers.DefaultJavaWalker.visit(DefaultJavaWalke
r.java:497)
        ... 19 more
Caused by: java.lang.NullPointerException
        at org.walkmod.sonar.visitors.SonarVisitor.getVisitors(SonarVisitor.java
:83)
        at org.walkmod.sonar.visitors.SonarVisitor.visit(SonarVisitor.java:43)
        at org.walkmod.sonar.visitors.SonarVisitor.visit(SonarVisitor.java:24)
        ... 26 more
DEBUG [Thread-1] - Closing expired connections

Why I am getting this exception?

[rpau]

Probably it is because it cannot connect and get the rules from your SonarQube server.

This project is open source, so you can check the code: https://github.com/walkmod/walkmod-sonar-plugin/blob/master/src/main/java/org/walkmod/sonar/visitors/SonarVisitor.java#L83

Then, I will add a more appropriate exception for this to improve the feedback.