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https://jira.codehaus.org/browse/MNG-5248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=292157#comment-292157
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Gili commented on MNG-5248:
---------------------------
I stand corrected. It seems the environment variable has a value of an empty
string (not null). Somehow, this gets translates to null along the path from
maven-exec-plugin and
org.apache.commons.exec.environment.EnvironmentUtils.toStrings().
> NPE at EnvironmentUtils.toStrings()
> -----------------------------------
>
> Key: MNG-5248
> URL: https://jira.codehaus.org/browse/MNG-5248
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Plugin API
> Affects Versions: 3.0.4
> Environment: Ubuntu 10.04
> Reporter: Gili
>
> ProcessBuilder.environment() may contain keys with a null value. In my case
> "INSIDE_NAUTILUS_PYTHON=" was defined. If maven-exec-plugin is invoked with
> the same environment variables, the following exception is thrown:
> {code}
> java.lang.NullPointerException
> at
> org.apache.commons.exec.environment.EnvironmentUtils.toStrings(EnvironmentUtils.java:66)
> at
> org.apache.commons.exec.launcher.Java13CommandLauncher.exec(Java13CommandLauncher.java:56)
> at
> org.apache.commons.exec.DefaultExecutor.launch(DefaultExecutor.java:254)
> at
> org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:319)
> at
> org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:160)
> at org.codehaus.mojo.exec.ExecMojo.executeCommandLine(ExecMojo.java:610)
> at org.codehaus.mojo.exec.ExecMojo.execute(ExecMojo.java:352)
> {code}
> Expected behavior: EnvironmentUtils.toStrings() should be able to handle the
> Map returned by ProcessBuilder with the same interpretation as it treats null
> keys and values.
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