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https://issues.apache.org/jira/browse/MNG-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17555765#comment-17555765
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Michael Bauer commented on MNG-7498:
------------------------------------
To provide more detail, I was building the latest Maven so I could install
Hadoop. I downloaded the source tarball from the URL provided on
[https://maven.apache.org/download.cgi.] The tarball unpacked with the
following code in apache-maven/pom.xml:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>clean</goal>
</goals>
<id>clean-target-dir</id>
<phase>prepare-package</phase>
<configuration>
<excludeDefaultDirectories>true</excludeDefaultDirectories>
<filesets>
<fileset>
<directory>${distributionTargetDir}</directory>
</fileset>
</filesets>
</configuration>
</execution>
</executions>
</plugin>
This appears to have been the cause of the problem. I removed that entire
block from apache-maven/pom.xml. The project built and installed.
I don't know if this is properly a bug – it sure looks like one – because it is
specific to people using NetApp's snapshot feature. The configuration file
came from the Maven source code tarball as downloaded.
> Cannot use Maven to install a project on a NetApp volume
> --------------------------------------------------------
>
> Key: MNG-7498
> URL: https://issues.apache.org/jira/browse/MNG-7498
> Project: Maven
> Issue Type: Bug
> Components: Deployment
> Affects Versions: 3.8.6
> Environment: RHEL 7 with a NetApp file server.
> Reporter: Michael Bauer
> Assignee: Michael Osipov
> Priority: Minor
> Fix For: waiting-for-feedback
>
>
> By default, every directory in a volume that is exported from a Network
> Appliance contains a directory named '.snapshot'. That directory is created
> and maintained by the NetApp. It is read-only; it cannot be deleted or
> altered.
>
> Maven appears to refuse to install into a directory that is not cleaned out,
> and because of the nature of the subdirectory .snapshot it cannot delete that
> subdirectory. Ergo, I get errors like:
>
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-clean-plugin:3.1.0:clean (clean-target-dir) on
> project apache-maven: Failed to clean project: Failed to delete
> /usr/sup/apache-maven-3.8.6/.snapshot -> [Help 1]
>
> /usr/sup is on a NetApp volume. I did not ask for 'clean' on this install:
>
> % mvn -DdistributionTargetDir='/usr/sup/apache-maven-3.8.6' install
>
> I am a sysadmin, not a developer. My ideal is repeatable builds, so I would
> prefer to have a way to do this that uses released software. End goal: a
> professor wants Hadoop, and Hadoop wants to be installed with a newer version
> of Maven than RHEL 7 provides. If I can't install Maven with Maven, I don't
> expect that installing Hadoop with Maven will work either.
>
> Is there a way to tell Maven to ignore the .snapshot subdirectory in an
> otherwise empty target directory?
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