[jira] [Issue Comment Deleted] (MNG-6626) NullPointerException in DefaultExceptionHandler

["Sergey Chernov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MNG-6626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Chernov updated MNG-6626:
--------------------------------
    Comment: was deleted

(was: [https://github.com/apache/maven/pull/241]

 )

> NullPointerException in DefaultExceptionHandler
> -----------------------------------------------
>
>                 Key: MNG-6626
>                 URL: https://issues.apache.org/jira/browse/MNG-6626
>             Project: Maven
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.1.0, 3.6.0
>            Reporter: Sergey Chernov
>            Priority: Minor
>         Attachments: original-exception.txt
>
>   Original Estimate: 1h
>          Time Spent: 10m
>  Remaining Estimate: 50m
>
> *DefaultExceptionHandler* classifies errors on goal execution. There is a special case when the root cause is *NoClassDefFoundError* with null message, it causes NPE with the stacktrace:
> {code:java}
> java.lang.NullPointerException
>  at org.apache.maven.exception.DefaultExceptionHandler.getReference (DefaultExceptionHandler.java:212)
>  at org.apache.maven.exception.DefaultExceptionHandler.getReference (DefaultExceptionHandler.java:231)
>  at org.apache.maven.exception.DefaultExceptionHandler.handle (DefaultExceptionHandler.java:101)
>  at org.apache.maven.exception.DefaultExceptionHandler.handleException (DefaultExceptionHandler.java:96)
>  at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
>  at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
>  at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
>  at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
>  at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
>  at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
>  at java.lang.reflect.Method.invoke (Method.java:498)
>  at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
>  at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
>  at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
>  at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
> {code}
> The problem here is that the real exception is lost and it's even not present in debug log mode. The full root exception is attached to the ticket (original-exception.txt).
>  
> The reason for this defect is trivial: *DefaultExceptionHandler.java:212* does not have a null check for getMessage



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