aliteralmind aliteralmind - 1 month ago 23
Java Question

Why am I getting a "401 Unauthorized" error in Maven?

Why am I getting a "401 Unauthorized" error in Maven?

Here's the error I'm getting when calling

mvn deploy
(full logs at the bottom):

[INFO] BUILD FAILURE


[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project xbnjava: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized. -> [Help 1]


According to this sonatype support page:


"If you are receiving a 401 it is because maven is sending the wrong login credentials, or no credentials at all."


Below are the steps I've taken, below that are my full
settings.xml
and
pom.xml
files, and below that are the full logs from
mvn deploy
and
mvn deploy -e
.

Any ideas would be appreciated. I am just hitting wall after wall with Maven.




I followed sonatype's checklist when receiving a 401 error:


Checklist item 1. Make sure your username/password is correct by logging into the Nexus UI. If curl is installed on your machine, you can try deploying an artifact with...



  • I successfully logged in and out of the sonatype.org website, using the user/pass in
    settings.xml
    .

  • I attempted to use
    curl
    to manually deploy an artifact, with the command



[C:\]curl -u MY_SONATYPE_DOT_COM_USERNAME:MY_SONATYPE_DOT_COM_PASSWORD https://oss.sonatype.org/content/repositories/snapshots/com/github/aliteralmind/xbnjava/0.1.2-SNAPSHOT/xbnjava-0.1.2-20140716.224928-1.pom --request PUT --data @pom.xml


but got this error:

Warning: Couldn't read data from file "pom.xml", this makes an empty POST.
curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
of Certificate Authority (CA) public keys (CA certs). If the default
bundle file isn't adequate, you can specify an alternate file
using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
the bundle, the certificate verification probably failed due to a
problem with the certificate (it might be expired, or the name might
not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
the -k (or --insecure) option.


I ran it again with the
-k
option, and this time got only this:

Couldn't read data from file "pom.xml", this makes an empty POST.


I've never used curl before, so I'm at a loss on what to do with this information.


Checklist item 2. If there is no error output, ensure your user privileges are correctly configured on the server. Make sure to drop the repo you just created.


I don't know what "drop" means. I believe my privileges are properly installed, as I received this message from sonatype:



and I have successfully put these items onto the server via
mvn deploy
in the past couple days.

The project's settings:

project settings


Checklist item 3. Make sure you have configured a server in
settings.xml
and that the server id is identical to the distribution repository id in pom.xml.




  • In
    settings.xml
    , settings/servers/server/id equals
    ossrh

  • In
    pom.xml
    , distributionManagement/snapshotRepository/id equals
    ossrh



(full files are at the bottom)


Checklist item 4. Make sure your settings.xml is in the correct place (normally it’s _~/.m2/settings.xml). You can check this by running mvn help:effective-settings.


According to Maven's settings reference, settings.xml must be in one of two locations:


  • The Maven install:
    $M2_HOME/conf/settings.xml

  • A user’s install:
    ${user.home}/.m2/settings.xml



Here's my setup:


  • settings.xml
    :
    C:\applications\programming\apache-maven-3.2.2\conf\settings.xml

  • M2_HOME
    is
    C:\applications\programming\apache-maven-3.2.2



Output for
mvn help:effective-settings
:

[C:\applications\utilities\curl]
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-help-plugin:2.2:effective-settings (default-cli) @ standalone-pom ---
[INFO]
Effective user-specific configuration settings:

<?xml version="1.0" encoding="UTF-8"?>
<!-- ====================================================================== -->
<!-- -->
<!-- Generated by Maven Help Plugin on 2014-07-18T12:48:19 -->
<!-- See: http://maven.apache.org/plugins/maven-help-plugin/ -->
<!-- -->
<!-- ====================================================================== -->

<!-- ====================================================================== -->
<!-- -->
<!-- Effective Settings for 'jeffy' on 'kermit-the-frog' -->
<!-- -->
<!-- ====================================================================== -->

<settings xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:sc
hemaLocation="http://maven.apache.org/SETTINGS/1.1.0 http://maven.apache.org/xsd/settings-1.1.0.xsd">
<localRepository xmlns="http://maven.apache.org/SETTINGS/1.1.0">C:\Users\jeffy\.m2\repository</localRepository
>
<servers xmlns="http://maven.apache.org/SETTINGS/1.1.0">
<server>
<username>MY_SONATYPE_DOT_COM_USERNAME</username>
<password>***</password>
<id>ossrh</id>
</server>
</servers>
<pluginGroups xmlns="http://maven.apache.org/SETTINGS/1.1.0">
<pluginGroup>org.apache.maven.plugins</pluginGroup>
<pluginGroup>org.codehaus.mojo</pluginGroup>
</pluginGroups>
</settings>

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.310 s
[INFO] Finished at: 2014-07-18T12:48:19-04:00
[INFO] Final Memory: 7M/17M
[INFO] ------------------------------------------------------------------------



Checklist item 5. If the server is using https but the URL in your POM is http, you might get 401 as well.


I don't understand which url it's referring to.


Checklist item 6. Use the latest version of Maven, as there is a known issue regarding 401: MNG-4469


I am using the latest version:

[C:\]mvn -version
Apache Maven 3.2.2 (45f7c06d68e745d05611f7fd14efb6594181933e; 2014-06-17T09:51:42-04:00)
Maven home: C:\applications\programming\apache-maven-3.2.2
Java version: 1.7.0_51, vendor: Oracle Corporation
Java home: C:\applications\programming\jdk_7_51\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"


------------------



Full
settings.xml
and
pom.xml
files



(Full logs for
mvn deploy
and
mvn deploy -e
below)

settings.xml
:

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<servers>
<server>
<id>ossrh</id>
<username>MY_SONATYPE_DOT_COM_USERNAME</username>
<password>MY_SONATYPE_DOT_COM_PASSWORD</password>
</server>
</servers>

<pluginGroups></pluginGroups>
<proxies></proxies>
<mirrors></mirrors>
<profiles></profiles>
</settings>


pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.github.aliteralmind</groupId>
<artifactId>xbnjava</artifactId>
<packaging>pom</packaging>
<version>0.1.2</version>
<name>XBN-Java</name>
<url>https://github.com/aliteralmind/xbnjava</url>
<inceptionYear>2014</inceptionYear>
<organization>
<name>Jeff Epstein</name>
</organization>
<description>XBN-Java is a collection of generically-useful backend (server side, non-GUI) programming utilities, featuring RegexReplacer and FilteredLineIterator. XBN-Java is the foundation of Codelet (http://codelet.aliteralmind.com).</description>

<parent>
<groupId>org.sonatype.oss</groupId>
<artifactId>oss-parent</artifactId>
<version>7</version>
</parent>

<licenses>
<license>
<name>Lesser General Public License (LGPL) version 3.0</name>
<url>https://www.gnu.org/licenses/lgpl-3.0.txt</url>
</license>
<license>
<name>Apache Software License (ASL) version 2.0</name>
<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
</license>
</licenses>

<developers>
<developer>
<name>Jeff Epstein</name>
<email>aliteralmind-github@yahoo.com</email>
<roles>
<role>Lead Developer</role>
</roles>
</developer>
</developers>

<issueManagement>
<system>GitHub Issue Tracker</system>
<url>https://github.com/aliteralmind/xbnjava/issues</url>
</issueManagement>

<distributionManagement>
<snapshotRepository>
<id>ossrh</id>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
</snapshotRepository>
</distributionManagement>

<scm>
<connection>scm:git:git@github.com:aliteralmind/xbnjava.git</connection>
<url>scm:git:git@github.com:aliteralmind/xbnjava.git</url>
<developerConnection>scm:git:git@github.com:aliteralmind/xbnjava.git</developerConnection>
</scm>

<properties>
<java.version>1.7</java.version>
<jarprefix>R:\jeffy\programming\build\/${project.artifactId}-${project.version}/download/${project.artifactId}-${project.version}</jarprefix>
</properties>
<!--
<profiles>
<profile>
<id>default-tools.jar</id>
<activation>
<property>
<name>java.vendor</name>
<value>Sun Microsystems Inc.</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.4.2</version>
<scope>system</scope>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
</dependency>
</dependencies>
</profile>
</profiles>
-->
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<id>attach-artifacts</id>
<phase>package</phase>
<goals>
<goal>attach-artifact</goal>
</goals>
<configuration>
<artifacts>
<artifact>
<file>${jarprefix}-all.jar</file>
<type>jar</type>
</artifact>
</artifacts>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>

<profiles>
<!--
This profile will sign the JAR file, sources file, and javadocs file using the GPG key on the local machine.
See: https://docs.sonatype.org/display/Repository/How+To+Generate+PGP+Signatures+With+Maven
-->
<profile>
<id>release-sign-artifacts</id>
<activation>
<property>
<name>release</name>
<value>true</value>
</property>
</activation>
</profile>
</profiles>
</project>


------------------



Full logs for
mvn deploy
and
mvn deploy -e



mvn deploy
output:

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building XBN-Java 0.1.2
[INFO] ------------------------------------------------------------------------
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ xbnjava ---
[INFO] --- build-helper-maven-plugin:1.8:attach-artifact (attach-artifacts) @ xbnjava ---
[INFO] --- maven-install-plugin:2.4:install (default-install) @ xbnjava ---
[INFO] Installing R:\jeffy\programming\sandbox\z__for_git_commit_only\xbnjava\pom.xml to C:\Users\jeffy\.m2\repository\com\github\aliteralmind\xbnjava\0.1.2\xbnjava-0.1.2.pom
[INFO] Installing R:\jeffy\programming\build\xbnjava-0.1.2\download\xbnjava-0.1.2-all.jar to C:\Users\jeffy\.m2\repository\com\github\aliteralmind\xbnjava\0.1.2\xbnjava-0.1.2.jar
[INFO] --- maven-deploy-plugin:2.7:deploy (default-deploy) @ xbnjava ---
Uploading: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom
2/6 KB
4/6 KB
6/6 KB


(Failure section:)

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.204 s
[INFO] Finished at: 2014-07-18T11:25:17-04:00
[INFO] Final Memory: 7M/17M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project xbnjava: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException


mvn deploy -e
output:

[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building XBN-Java 0.1.2
[INFO] ------------------------------------------------------------------------
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ xbnjava ---
[INFO] --- build-helper-maven-plugin:1.8:attach-artifact (attach-artifacts) @ xbnjava ---
[INFO] --- maven-install-plugin:2.4:install (default-install) @ xbnjava ---
[INFO] Installing R:\jeffy\programming\sandbox\z__for_git_commit_only\xbnjava\pom.xml to C:\Users\jeffy\.m2\repository\com\github\aliteralmind\xbnjava\0.1.2\xbnjava-0.1.2.pom
[INFO] Installing R:\jeffy\programming\build\xbnjava-0.1.2\download\xbnjava-0.1.2-all.jar to C:\Users\jeffy\.m2\repository\com\github\aliteralmind\xbnjava\0.1.2\xbnjava-0.1.2.jar
[INFO] --- maven-deploy-plugin:2.7:deploy (default-deploy) @ xbnjava ---
Uploading: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom
2/6 KB
4/6 KB
6/6 KB


(Failure section:)

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.492 s
[INFO] Finished at: 2014-07-18T11:25:37-04:00
[INFO] Final Memory: 7M/17M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project xbnjava: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project xbnjava: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.apache.maven.plugin.deploy.DeployMojo.execute(DeployMojo.java:193)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
... 19 more
Caused by: org.apache.maven.artifact.deployer.ArtifactDeploymentException: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.apache.maven.artifact.deployer.DefaultArtifactDeployer.deploy(DefaultArtifactDeployer.java:143)
at org.apache.maven.plugin.deploy.AbstractDeployMojo.deploy(AbstractDeployMojo.java:167)
at org.apache.maven.plugin.deploy.DeployMojo.execute(DeployMojo.java:149)
... 21 more
Caused by: org.eclipse.aether.deployment.DeploymentException: Failed to deploy artifacts: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:337)
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:268)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.deploy(DefaultRepositorySystem.java:413)
at org.apache.maven.artifact.deployer.DefaultArtifactDeployer.deploy(DefaultArtifactDeployer.java:139)
... 23 more
Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact com.github.aliteralmind:xbnjava:pom:0.1.2 from/to sonatype-nexus-staging (https://oss.sonatype.org/service/local/staging/deploy/maven2/): Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$6.wrap(WagonRepositoryConnector.java:1016)
at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$6.wrap(WagonRepositoryConnector.java:1004)
at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$PutTask.run(WagonRepositoryConnector.java:895)
at org.eclipse.aether.connector.wagon.WagonRepositoryConnector.put(WagonRepositoryConnector.java:522)
at org.eclipse.aether.internal.impl.DefaultDeployer.deploy(DefaultDeployer.java:331)
... 26 more
Caused by: org.apache.maven.wagon.TransferFailedException: Failed to transfer file: https://oss.sonatype.org/service/local/staging/deploy/maven2/com/github/aliteralmind/xbnjava/0.1.2/xbnjava-0.1.2.pom. Return code is: 401, ReasonPhrase: Unauthorized.
at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.put(AbstractHttpClientWagon.java:573)
at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.put(AbstractHttpClientWagon.java:493)
at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.put(AbstractHttpClientWagon.java:474)
at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.put(AbstractHttpClientWagon.java:454)
at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$PutTask.run(WagonRepositoryConnector.java:871)
... 28 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Answer

I've had similar errors when trying to deploy a Gradle artefact to a Nexus Sonatype repository. You will get a 401 Unauthorized error if you supply the wrong credentials (password etc). You also get an error (and off the top of my head is also a 401) if you try to publish something to a releases repository and that version already exists in the repository. So you might find that by publishing from the command line it works, but then when you do it from a script it fails (because it didn't exist in the repository the first time around). Either publish using a different version number, or delete the old artefact on the server and republish.

The SNAPSHOTS repository (as opposed to the releases repository) allows you to overwrite a similarly numbered version, but your version number should have "-SNAPSHOT" at the end of it.