Hi developers,

I've got an issue with the release plugin as it does not recognize the parameter
-Dproject.scm.developerConnection.

My build fails with:
Missing required setting: scm connection or developerConnection must
be specified.

It works if I add an scm tag to the pom.xml, but I would prefer to
pass the scm connection via commandline as describes here:
https://maven.apache.org/guides/mini/guide-releasing.html

The reason is that we have got a central build pipeline which builds
100+ applications. After migrating to the (great) release plugin
mechanism, we have to add the scm tag to all application pom.xml
files. Therefore I would like to pass the parameter from outside via
-D option.

If you confirm that this is an issue I would have a look at the code
and might provide a patch.

Best regards,

Lui

P.S. full output attached
mvn org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare 
-Dproject.scm.connection=https://github.com/lbaeumer/sonar.git -X
Apache Maven 3.5.3 (3383c37e1f9e9b3bc3df5050c29c8aff9f295297; 
2018-02-24T20:49:05+01:00)
Maven home: /usr/local/Cellar/maven/3.5.3/libexec
Java version: 1.8.0_111, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.13.6", arch: "x86_64", family: "mac"
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG]   Imported: javax.annotation.* < plexus.core
[DEBUG]   Imported: javax.annotation.security.* < plexus.core
[DEBUG]   Imported: javax.enterprise.inject.* < plexus.core
[DEBUG]   Imported: javax.enterprise.util.* < plexus.core
[DEBUG]   Imported: javax.inject.* < plexus.core
[DEBUG]   Imported: org.apache.maven.* < plexus.core
[DEBUG]   Imported: org.apache.maven.artifact < plexus.core
[DEBUG]   Imported: org.apache.maven.classrealm < plexus.core
[DEBUG]   Imported: org.apache.maven.cli < plexus.core
[DEBUG]   Imported: org.apache.maven.configuration < plexus.core
[DEBUG]   Imported: org.apache.maven.exception < plexus.core
[DEBUG]   Imported: org.apache.maven.execution < plexus.core
[DEBUG]   Imported: org.apache.maven.execution.scope < plexus.core
[DEBUG]   Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG]   Imported: org.apache.maven.model < plexus.core
[DEBUG]   Imported: org.apache.maven.monitor < plexus.core
[DEBUG]   Imported: org.apache.maven.plugin < plexus.core
[DEBUG]   Imported: org.apache.maven.profiles < plexus.core
[DEBUG]   Imported: org.apache.maven.project < plexus.core
[DEBUG]   Imported: org.apache.maven.reporting < plexus.core
[DEBUG]   Imported: org.apache.maven.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG]   Imported: org.apache.maven.settings < plexus.core
[DEBUG]   Imported: org.apache.maven.toolchain < plexus.core
[DEBUG]   Imported: org.apache.maven.usability < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG]   Imported: org.codehaus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.* < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.component < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.container < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.context < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < 
plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < 
plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < 
plexus.core
[DEBUG]   Imported: org.eclipse.aether.* < plexus.core
[DEBUG]   Imported: org.eclipse.aether.artifact < plexus.core
[DEBUG]   Imported: org.eclipse.aether.collection < plexus.core
[DEBUG]   Imported: org.eclipse.aether.deployment < plexus.core
[DEBUG]   Imported: org.eclipse.aether.graph < plexus.core
[DEBUG]   Imported: org.eclipse.aether.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.installation < plexus.core
[DEBUG]   Imported: org.eclipse.aether.internal.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.metadata < plexus.core
[DEBUG]   Imported: org.eclipse.aether.repository < plexus.core
[DEBUG]   Imported: org.eclipse.aether.resolution < plexus.core
[DEBUG]   Imported: org.eclipse.aether.spi < plexus.core
[DEBUG]   Imported: org.eclipse.aether.transfer < plexus.core
[DEBUG]   Imported: org.eclipse.aether.version < plexus.core
[DEBUG]   Imported: org.fusesource.jansi.* < plexus.core
[DEBUG]   Imported: org.slf4j.* < plexus.core
[DEBUG]   Imported: org.slf4j.helpers.* < plexus.core
[DEBUG]   Imported: org.slf4j.spi.* < plexus.core
[DEBUG] Populating class realm maven.api
[INFO] Error stacktraces are turned on.
[DEBUG] Message scheme: color
[DEBUG] Message styles: debug info warning error success failure strong mojo 
project
[DEBUG] Reading global settings from 
/usr/local/Cellar/maven/3.5.3/libexec/conf/settings.xml
[DEBUG] Reading user settings from /Users/ludgerbaumer/.m2/settings.xml
[DEBUG] Reading global toolchains from 
/usr/local/Cellar/maven/3.5.3/libexec/conf/toolchains.xml
[DEBUG] Reading user toolchains from /Users/ludgerbaumer/.m2/toolchains.xml
[DEBUG] Using local repository at /Users/ludgerbaumer/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for 
/Users/ludgerbaumer/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project de.test:just-a-test:jar:0.0.1-SNAPSHOT: 
(none)
[DEBUG] Looking up lifecycle mappings for packaging jar from 
ClassRealm[plexus.core, parent: null]
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: de.test:just-a-test:jar:0.0.1-SNAPSHOT
[DEBUG] Tasks:   [org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare]
[DEBUG] Style:   Aggregating
[DEBUG] =======================================================================
[INFO] 
[INFO] ------------------------< de.test:just-a-test >-------------------------
[INFO] Building just-a-test 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, 
process-sources, generate-resources, process-resources, compile, 
process-classes, generate-test-sources, process-test-sources, 
generate-test-resources, process-test-resources, test-compile, 
process-test-classes, test, prepare-package, package, pre-integration-test, 
integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] === PROJECT BUILD PLAN ================================================
[DEBUG] Project:       de.test:just-a-test:0.0.1-SNAPSHOT
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): []
[DEBUG] Repositories (dependencies): [central 
(https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] Repositories (plugins)     : [central 
(https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          
org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare (default-cli)
[DEBUG] Style:         Aggregating
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <addSchema default-value="true">${addSchema}</addSchema>
  <allowReleasePluginSnapshot 
default-value="false">${allowReleasePluginSnapshot}</allowReleasePluginSnapshot>
  <allowTimestampedSnapshots 
default-value="false">${ignoreSnapshots}</allowTimestampedSnapshots>
  <arguments>${arguments}</arguments>
  <autoVersionSubmodules 
default-value="false">${autoVersionSubmodules}</autoVersionSubmodules>
  <basedir default-value="${basedir}"/>
  
<checkModificationExcludeList>${checkModificationExcludeList}</checkModificationExcludeList>
  <commitByProject default-value="false">${commitByProject}</commitByProject>
  <completionGoals default-value="">${completionGoals}</completionGoals>
  <developmentVersion>${developmentVersion}</developmentVersion>
  <dryRun default-value="false">${dryRun}</dryRun>
  <generateReleasePoms 
default-value="false">${generateReleasePoms}</generateReleasePoms>
  <javaHome default-value="${java.home}"/>
  <localRepoDirectory default-value="${maven.repo.local}"/>
  <mavenExecutorId default-value="invoker">${mavenExecutorId}</mavenExecutorId>
  <mavenHome default-value="${maven.home}"/>
  <password>${password}</password>
  <pomFileName>${pomFileName}</pomFileName>
  <preparationGoals default-value="clean 
verify">${preparationGoals}</preparationGoals>
  <project default-value="${project}"/>
  <projectVersionPolicyId 
default-value="default">${projectVersionPolicyId}</projectVersionPolicyId>
  <pushChanges default-value="true">${pushChanges}</pushChanges>
  <reactorProjects default-value="${reactorProjects}"/>
  <releaseVersion>${releaseVersion}</releaseVersion>
  <remoteTagging default-value="true">${remoteTagging}</remoteTagging>
  <resume default-value="true">${resume}</resume>
  <scmCommentPrefix default-value="[maven-release-plugin] 
">${scmCommentPrefix}</scmCommentPrefix>
  <session default-value="${session}"/>
  <settings default-value="${settings}"/>
  <suppressCommitBeforeTag 
default-value="false">${suppressCommitBeforeTag}</suppressCommitBeforeTag>
  <tag>${tag}</tag>
  <tagBase>${tagBase}</tagBase>
  <tagNameFormat 
default-value="@{project.artifactId}-@{project.version}">${tagNameFormat}</tagNameFormat>
  <updateDependencies 
default-value="true">${updateDependencies}</updateDependencies>
  <updateWorkingCopyVersions 
default-value="true">${updateWorkingCopyVersions}</updateWorkingCopyVersions>
  <useEditMode default-value="false">${useEditMode}</useEditMode>
  <username>${username}</username>
  <waitBeforeTagging default-value="0">${waitBeforeTagging}</waitBeforeTagging>
</configuration>
[DEBUG] =======================================================================
[INFO] 
[INFO] --- maven-release-plugin:2.5.3:prepare (default-cli) @ just-a-test ---
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=2091468, 
ConflictMarker.markTime=941001, ConflictMarker.nodeCount=182, 
ConflictIdSorter.graphTime=1217356, ConflictIdSorter.topsortTime=670617, 
ConflictIdSorter.conflictIdCount=68, ConflictIdSorter.conflictIdCycleCount=0, 
ConflictResolver.totalTime=12493939, ConflictResolver.conflictItemCount=171, 
DefaultDependencyCollector.collectTime=458002287, 
DefaultDependencyCollector.transformTime=19946073}
[DEBUG] org.apache.maven.plugins:maven-release-plugin:jar:2.5.3:
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.2.1:compile
[DEBUG]    org.apache.maven.release:maven-release-manager:jar:2.5.3:compile
[DEBUG]       org.apache.maven.release:maven-release-api:jar:2.5.3:compile
[DEBUG]          org.eclipse.aether:aether-util:jar:1.0.0.v20140518:compile
[DEBUG]             org.eclipse.aether:aether-api:jar:1.0.0.v20140518:compile
[DEBUG]       
org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9:compile
[DEBUG]          junit:junit:jar:3.8.1:compile
[DEBUG]       
org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-6:compile
[DEBUG]       org.codehaus.plexus:plexus-interpolation:jar:1.14:compile
[DEBUG]       org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3:compile
[DEBUG]          org.sonatype.plexus:plexus-cipher:jar:1.4:compile
[DEBUG]       org.apache.maven:maven-artifact:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-artifact-manager:jar:2.2.1:compile
[DEBUG]          
backport-util-concurrent:backport-util-concurrent:jar:3.1:compile
[DEBUG]       org.apache.maven.shared:maven-invoker:jar:2.2:compile
[DEBUG]          
org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile
[DEBUG]       commons-lang:commons-lang:jar:2.4:compile
[DEBUG]       commons-cli:commons-cli:jar:1.2:compile
[DEBUG]       commons-io:commons-io:jar:2.2:compile
[DEBUG]       
org.apache.maven.scm:maven-scm-providers-standard:pom:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-accurev:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-bazaar:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-clearcase:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-cvsexe:jar:1.9.4:runtime
[DEBUG]             
org.apache.maven.scm:maven-scm-provider-cvs-commons:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-cvsjava:jar:1.9.4:runtime
[DEBUG]             org.netbeans.lib:cvsclient:jar:20060125:runtime
[DEBUG]             ch.ethz.ganymed:ganymed-ssh2:jar:build210:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-gitexe:jar:1.9.4:runtime
[DEBUG]             
org.apache.maven.scm:maven-scm-provider-git-commons:jar:1.9.4:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-hg:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-perforce:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-starteam:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-svnexe:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-synergy:jar:1.9.4:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-vss:jar:1.9.4:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-tfs:jar:1.9.4:runtime
[DEBUG]          
org.apache.maven.scm:maven-scm-provider-integrity:jar:1.9.4:runtime
[DEBUG]             com.mks.api:mksapi-jar:jar:4.10.9049:runtime
[DEBUG]             org.codehaus.groovy:groovy-all:jar:1.7.6:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-jazz:jar:1.9.4:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-manager-plexus:jar:1.8:runtime
[DEBUG]       
org.apache.maven.scm:maven-scm-provider-svn-commons:jar:1.9.4:compile
[DEBUG]       jaxen:jaxen:jar:1.1-beta-8:runtime
[DEBUG]          jdom:jdom:jar:1.0:runtime
[DEBUG]    org.apache.maven:maven-model:jar:2.2.1:compile
[DEBUG]    org.apache.maven:maven-core:jar:2.2.1:compile
[DEBUG]       
org.apache.maven:maven-plugin-parameter-documenter:jar:2.2.1:compile
[DEBUG]       org.slf4j:slf4j-jdk14:jar:1.5.6:runtime
[DEBUG]          org.slf4j:slf4j-api:jar:1.5.6:runtime
[DEBUG]       org.slf4j:jcl-over-slf4j:jar:1.5.6:runtime
[DEBUG]       org.apache.maven.reporting:maven-reporting-api:jar:2.2.1:compile
[DEBUG]          org.apache.maven.doxia:doxia-sink-api:jar:1.1:compile
[DEBUG]          org.apache.maven.doxia:doxia-logging-api:jar:1.1:compile
[DEBUG]       org.apache.maven:maven-profile:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-repository-metadata:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-error-diagnostics:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-plugin-descriptor:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-monitor:jar:2.2.1:compile
[DEBUG]       classworlds:classworlds:jar:1.1:compile
[DEBUG]    org.apache.maven:maven-project:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-plugin-registry:jar:2.2.1:compile
[DEBUG]    org.apache.maven:maven-settings:jar:2.2.1:compile
[DEBUG]    org.apache.maven.scm:maven-scm-api:jar:1.9.4:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:3.0.15:compile
[DEBUG]    org.jdom:jdom:jar:1.1:compile
[DEBUG] Created new class realm 
plugin>org.apache.maven.plugins:maven-release-plugin:2.5.3
[DEBUG] Importing foreign packages into class realm 
plugin>org.apache.maven.plugins:maven-release-plugin:2.5.3
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm 
plugin>org.apache.maven.plugins:maven-release-plugin:2.5.3
[DEBUG]   Included: org.apache.maven.plugins:maven-release-plugin:jar:2.5.3
[DEBUG]   Included: org.apache.maven.release:maven-release-manager:jar:2.5.3
[DEBUG]   Included: org.apache.maven.release:maven-release-api:jar:2.5.3
[DEBUG]   Included: org.eclipse.aether:aether-util:jar:1.0.0.v20140518
[DEBUG]   Included: junit:junit:jar:3.8.1
[DEBUG]   Included: org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-6
[DEBUG]   Included: org.codehaus.plexus:plexus-interpolation:jar:1.14
[DEBUG]   Included: org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3
[DEBUG]   Included: org.sonatype.plexus:plexus-cipher:jar:1.4
[DEBUG]   Included: backport-util-concurrent:backport-util-concurrent:jar:3.1
[DEBUG]   Included: org.apache.maven.shared:maven-invoker:jar:2.2
[DEBUG]   Included: org.codehaus.plexus:plexus-component-annotations:jar:1.5.5
[DEBUG]   Included: commons-lang:commons-lang:jar:2.4
[DEBUG]   Included: commons-cli:commons-cli:jar:1.2
[DEBUG]   Included: commons-io:commons-io:jar:2.2
[DEBUG]   Included: org.apache.maven.scm:maven-scm-providers-standard:pom:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-accurev:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-bazaar:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-clearcase:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-cvsexe:jar:1.9.4
[DEBUG]   Included: 
org.apache.maven.scm:maven-scm-provider-cvs-commons:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-cvsjava:jar:1.9.4
[DEBUG]   Included: org.netbeans.lib:cvsclient:jar:20060125
[DEBUG]   Included: ch.ethz.ganymed:ganymed-ssh2:jar:build210
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-gitexe:jar:1.9.4
[DEBUG]   Included: 
org.apache.maven.scm:maven-scm-provider-git-commons:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-hg:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-perforce:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-starteam:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-svnexe:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-synergy:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-vss:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-tfs:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-integrity:jar:1.9.4
[DEBUG]   Included: com.mks.api:mksapi-jar:jar:4.10.9049
[DEBUG]   Included: org.codehaus.groovy:groovy-all:jar:1.7.6
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-jazz:jar:1.9.4
[DEBUG]   Included: org.apache.maven.scm:maven-scm-manager-plexus:jar:1.8
[DEBUG]   Included: 
org.apache.maven.scm:maven-scm-provider-svn-commons:jar:1.9.4
[DEBUG]   Included: jaxen:jaxen:jar:1.1-beta-8
[DEBUG]   Included: jdom:jdom:jar:1.0
[DEBUG]   Included: org.slf4j:slf4j-jdk14:jar:1.5.6
[DEBUG]   Included: org.slf4j:jcl-over-slf4j:jar:1.5.6
[DEBUG]   Included: org.apache.maven.reporting:maven-reporting-api:jar:2.2.1
[DEBUG]   Included: org.apache.maven.doxia:doxia-sink-api:jar:1.1
[DEBUG]   Included: org.apache.maven.doxia:doxia-logging-api:jar:1.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-api:jar:1.9.4
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:3.0.15
[DEBUG]   Included: org.jdom:jdom:jar:1.1
[DEBUG] Configuring mojo 
org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare from plugin realm 
ClassRealm[plugin>org.apache.maven.plugins:maven-release-plugin:2.5.3, parent: 
sun.misc.Launcher$AppClassLoader@42a57993]
[DEBUG] Configuring mojo 
'org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare' with basic 
configurator -->
[DEBUG]   (f) addSchema = true
[DEBUG]   (f) allowReleasePluginSnapshot = false
[DEBUG]   (f) allowTimestampedSnapshots = false
[DEBUG]   (f) autoVersionSubmodules = false
[DEBUG]   (s) basedir = /Users/ludgerbaumer/git/sonar
[DEBUG]   (f) commitByProject = false
[DEBUG]   (f) dryRun = false
[DEBUG]   (f) generateReleasePoms = false
[DEBUG]   (f) javaHome = 
/Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre
[DEBUG]   (f) mavenExecutorId = invoker
[DEBUG]   (f) mavenHome = /usr/local/Cellar/maven/3.5.3/libexec
[DEBUG]   (f) preparationGoals = clean verify
[DEBUG]   (f) project = MavenProject: de.test:just-a-test:0.0.1-SNAPSHOT @ 
/Users/ludgerbaumer/git/sonar/pom.xml
[DEBUG]   (f) projectVersionPolicyId = default
[DEBUG]   (f) pushChanges = true
[DEBUG]   (f) reactorProjects = [MavenProject: 
de.test:just-a-test:0.0.1-SNAPSHOT @ /Users/ludgerbaumer/git/sonar/pom.xml]
[DEBUG]   (f) remoteTagging = true
[DEBUG]   (f) resume = true
[DEBUG]   (f) scmCommentPrefix = [maven-release-plugin] 
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@100f9bbe
[DEBUG]   (f) settings = org.apache.maven.execution.SettingsAdapter@673bb956
[DEBUG]   (f) suppressCommitBeforeTag = false
[DEBUG]   (f) tagNameFormat = @{project.artifactId}-@{project.version}
[DEBUG]   (f) updateDependencies = true
[DEBUG]   (f) updateWorkingCopyVersions = true
[DEBUG]   (f) useEditMode = false
[DEBUG]   (f) waitBeforeTagging = 0
[DEBUG] -- end configuration --
[DEBUG] release.properties not found - using empty properties
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.205 s
[INFO] Finished at: 2018-09-18T21:09:52+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare (default-cli) on 
project just-a-test: Missing required setting: scm connection or 
developerConnection must be specified. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare (default-cli) on 
project just-a-test: Missing required setting: scm connection or 
developerConnection must be specified.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:213)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:81)
    at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
 (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute 
(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    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)
Caused by: org.apache.maven.plugin.MojoFailureException: Missing required 
setting: scm connection or developerConnection must be specified.
    at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease 
(PrepareReleaseMojo.java:294)
    at org.apache.maven.plugins.release.PrepareReleaseMojo.execute 
(PrepareReleaseMojo.java:240)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:81)
    at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
 (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute 
(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    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)
Caused by: org.apache.maven.shared.release.ReleaseFailureException: Missing 
required setting: scm connection or developerConnection must be specified.
    at org.apache.maven.shared.release.phase.CheckPomPhase.execute 
(CheckPomPhase.java:83)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare 
(DefaultReleaseManager.java:234)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare 
(DefaultReleaseManager.java:169)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare 
(DefaultReleaseManager.java:146)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare 
(DefaultReleaseManager.java:107)
    at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease 
(PrepareReleaseMojo.java:286)
    at org.apache.maven.plugins.release.PrepareReleaseMojo.execute 
(PrepareReleaseMojo.java:240)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:81)
    at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
 (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute 
(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    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)
[ERROR] 
[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/MojoFailureException


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