[SCM-922] NPE when executing scm:export

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Incomplete
• Affects Version/s: 1.11.1
• Assignee: Unassigned
• Reporter: Curtis Kennington
• Created: 25/Feb/19 17:14
• Updated: 23/Feb/20 20:25
• Resolved: 23/Feb/20 20:25

Description

I am trying to export a small number of files from a git repository as part of my maven build but I get an ambiguous NPE. I've reviewed my config but I believe it to be correct.

Please see the following log:

[INFO] --- maven-scm-plugin:1.11.1:export (export-migrations) @ db-replication ---
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=102942, ConflictMarker.markTime=67728, ConflictMarker.nodeCount=145, ConflictIdSorter.graphTime=84998, ConflictIdSorter.topsortTime=47298, ConflictIdSorter.conflictIdCount=59, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1289282, ConflictResolver.conflictItemCount=135, DefaultDependencyCollector.collectTime=15146507, DefaultDependencyCollector.transformTime=1641031}
[DEBUG] org.apache.maven.plugins:maven-scm-plugin:jar:1.11.1:
[DEBUG]    org.apache.maven:maven-project:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-profile:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-model:jar:2.2.1:compile
[DEBUG]       org.apache.maven:maven-artifact-manager:jar:2.2.1:compile
[DEBUG]          org.apache.maven:maven-repository-metadata:jar:2.2.1:compile
[DEBUG]          backport-util-concurrent:backport-util-concurrent:jar:3.1:compile
[DEBUG]       org.apache.maven:maven-plugin-registry:jar:2.2.1:compile
[DEBUG]       org.codehaus.plexus:plexus-interpolation:jar:1.11:compile
[DEBUG]       org.apache.maven:maven-artifact:jar:2.2.1:compile
[DEBUG]       org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9:compile
[DEBUG]          junit:junit:jar:4.12:compile
[DEBUG]             org.hamcrest:hamcrest-core:jar:1.3:compile
[DEBUG]          classworlds:classworlds:jar:1.1-alpha-2:compile
[DEBUG]    org.apache.maven:maven-settings:jar:2.2.1:compile
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.2.1:compile
[DEBUG]    org.apache.maven.scm:maven-scm-manager-plexus:jar:1.11.1:compile
[DEBUG]       org.apache.maven.scm:maven-scm-api:jar:1.11.1:compile
[DEBUG]    org.apache.maven.scm:maven-scm-providers-standard:pom:1.11.1:compile
[DEBUG]       org.apache.maven.scm:maven-scm-provider-accurev:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-bazaar:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-clearcase:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-cvsexe:jar:1.11.1:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-cvs-commons:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-cvsjava:jar:1.11.1: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:1.11.1:runtime
[DEBUG]          commons-io:commons-io:jar:2.6:runtime
[DEBUG]          commons-lang:commons-lang:jar:2.6:runtime
[DEBUG]          org.apache.maven.scm:maven-scm-provider-git-commons:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-jgit:jar:1.11.1:runtime
[DEBUG]          org.eclipse.jgit:org.eclipse.jgit:jar:4.5.4.201711221230-r:runtime
[DEBUG]             com.jcraft:jsch:jar:0.1.53:runtime
[DEBUG]             com.googlecode.javaewah:JavaEWAH:jar:0.7.9:runtime
[DEBUG]             org.apache.httpcomponents:httpclient:jar:4.3.6:runtime
[DEBUG]                org.apache.httpcomponents:httpcore:jar:4.3.3:runtime
[DEBUG]                commons-logging:commons-logging:jar:1.1.3:runtime
[DEBUG]                commons-codec:commons-codec:jar:1.6:runtime
[DEBUG]             org.slf4j:slf4j-api:jar:1.7.2:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-hg:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-perforce:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-starteam:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-svnexe:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-synergy:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-vss:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-tfs:jar:1.11.1:runtime
[DEBUG]       org.apache.maven.scm:maven-scm-provider-integrity:jar:1.11.1: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:1.11.1:runtime
[DEBUG]    org.apache.maven.scm:maven-scm-provider-local:jar:1.11.1:compile
[DEBUG]    org.apache.maven.scm:maven-scm-provider-svn-commons:jar:1.11.1:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:3.1.0:compile
[DEBUG]    org.apache.maven.shared:file-management:jar:1.2.1:compile
[DEBUG]       org.apache.maven.shared:maven-shared-io:jar:1.1:compile
[DEBUG]          org.apache.maven.wagon:wagon-provider-api:jar:1.0-alpha-6:compile
[DEBUG]    org.sonatype.plexus:plexus-sec-dispatcher:jar:1.4:compile
[DEBUG]       org.sonatype.plexus:plexus-cipher:jar:1.4:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-scm-plugin:1.11.1
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-scm-plugin:1.11.1
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-scm-plugin:1.11.1
[DEBUG]   Included: org.apache.maven.plugins:maven-scm-plugin:jar:1.11.1
[DEBUG]   Included: backport-util-concurrent:backport-util-concurrent:jar:3.1
[DEBUG]   Included: org.codehaus.plexus:plexus-interpolation:jar:1.11
[DEBUG]   Included: junit:junit:jar:4.12
[DEBUG]   Included: org.hamcrest:hamcrest-core:jar:1.3
[DEBUG]   Included: org.apache.maven.scm:maven-scm-manager-plexus:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-api:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-providers-standard:pom:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-accurev:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-bazaar:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-clearcase:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-cvsexe:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-cvs-commons:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-cvsjava:jar:1.11.1
[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:1.11.1
[DEBUG]   Included: commons-io:commons-io:jar:2.6
[DEBUG]   Included: commons-lang:commons-lang:jar:2.6
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-git-commons:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-jgit:jar:1.11.1
[DEBUG]   Included: org.eclipse.jgit:org.eclipse.jgit:jar:4.5.4.201711221230-r
[DEBUG]   Included: com.jcraft:jsch:jar:0.1.53
[DEBUG]   Included: com.googlecode.javaewah:JavaEWAH:jar:0.7.9
[DEBUG]   Included: org.apache.httpcomponents:httpclient:jar:4.3.6
[DEBUG]   Included: org.apache.httpcomponents:httpcore:jar:4.3.3
[DEBUG]   Included: commons-logging:commons-logging:jar:1.1.3
[DEBUG]   Included: commons-codec:commons-codec:jar:1.6
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-hg:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-perforce:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-starteam:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-svnexe:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-synergy:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-vss:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-tfs:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-integrity:jar:1.11.1
[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:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-local:jar:1.11.1
[DEBUG]   Included: org.apache.maven.scm:maven-scm-provider-svn-commons:jar:1.11.1
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:3.1.0
[DEBUG]   Included: org.apache.maven.shared:file-management:jar:1.2.1
[DEBUG]   Included: org.apache.maven.shared:maven-shared-io:jar:1.1
[DEBUG]   Included: org.sonatype.plexus:plexus-sec-dispatcher:jar:1.4
[DEBUG]   Included: org.sonatype.plexus:plexus-cipher:jar:1.4
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-scm-plugin:1.11.1:export from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-scm-plugin:1.11.1, parent: sun.misc.Launcher$AppClassLoader@5c647e05]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-scm-plugin:1.11.1:export' with basic configurator -->
[DEBUG]   (f) basedir = /Users/curtiskennington/Dev/git/db-replication-scripts
[DEBUG]   (f) connectionType = connection
[DEBUG]   (s) connectionUrl = scm:git:https://git-host/repo
[DEBUG]   (f) developerConnectionUrl = scm:git:https://git-host/repo
[DEBUG]   (s) exportDirectory = /Users/curtiskennington/Dev/git/db-replication-scripts/target/sql
[DEBUG]   (s) includes = db/src/*
[DEBUG]   (f) pushChanges = true
[DEBUG]   (f) scmVersion = master
[DEBUG]   (f) scmVersionType = branch
[DEBUG]   (f) settings = org.apache.maven.execution.SettingsAdapter@4b76aa5a
[DEBUG]   (f) skipExportIfExists = false
[DEBUG] -- end configuration --
[INFO] Removing /Users/curtiskennington/Dev/git/db-replication-scripts/target/sql
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.843 s
[INFO] Finished at: 2019-02-25T17:08:54Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-scm-plugin:1.11.1:export (export-migrations) on project db-replication: Execution export-migrations of goal org.apache.maven.plugins:maven-scm-plugin:1.11.1:export failed.: NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-scm-plugin:1.11.1:export (export-migrations) on project db-replication: Execution export-migrations of goal org.apache.maven.plugins:maven-scm-plugin:1.11.1:export failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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: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)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution export-migrations of goal org.apache.maven.plugins:maven-scm-plugin:1.11.1:export failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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: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)
Caused by: java.lang.NullPointerException
    at org.apache.maven.scm.provider.git.AbstractGitScmProvider.executeCommand (AbstractGitScmProvider.java:288)
    at org.apache.maven.scm.provider.git.AbstractGitScmProvider.export (AbstractGitScmProvider.java:245)
    at org.apache.maven.scm.provider.AbstractScmProvider.export (AbstractScmProvider.java:658)
    at org.apache.maven.scm.provider.AbstractScmProvider.export (AbstractScmProvider.java:640)
    at org.apache.maven.scm.manager.AbstractScmManager.export (AbstractScmManager.java:506)
    at org.apache.maven.scm.plugin.ExportMojo.export (ExportMojo.java:123)
    at org.apache.maven.scm.plugin.ExportMojo.execute (ExportMojo.java:79)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    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: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)
[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/PluginExecutionException