我正在尝试强制 Derby 的 Maven 构建来咳出一些 javadoc jar，以便我可以将它们包含在我们的存储库中。
我试图运行看起来正确的目标：
mvn javadoc:jar
但我得到的只是一个错误：
[INFO] ------------------------------------------------------------------------
[INFO] Building Apache Derby Network Server 10.12.1.1.mod.1
[INFO] ------------------------------------------------------------------------
[DEBUG] Resolving plugin prefix javadoc from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Resolved plugin prefix javadoc to org.apache.maven.plugins:maven-javadoc-plugin from POM org.apache.derby:derbynet:jar:10.12.1.1.mod.1
[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: org.apache.derby:derbynet:10.12.1.1.mod.1
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): [compile]
[DEBUG] Repositories (dependencies): [apache.snapshots (http://repository.apache.org/snapshots, default, snapshots), 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-javadoc-plugin:2.8:jar (default-cli)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
<additionalJOption>${additionalJOption}</additionalJOption>
<additionalparam>${additionalparam}</additionalparam>
<aggregate default-value="false">${aggregate}</aggregate>
<attach default-value="true">${attach}</attach>
<author default-value="true">${author}</author>
<bootclasspath>${bootclasspath}</bootclasspath>
<bootclasspathArtifacts>${bootclasspathArtifacts}</bootclasspathArtifacts>
<bottom default-value="Copyright &#169; {inceptionYear}-{currentYear} {organizationName}. All Rights Reserved.">${bottom}</bottom>
<breakiterator default-value="false">${breakiterator}</breakiterator>
<charset>${charset}</charset>
<debug default-value="false">${debug}</debug>
<defaultManifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</defaultManifestFile>
<destDir>${destDir}</destDir>
<detectJavaApiLink default-value="true">${detectJavaApiLink}</detectJavaApiLink>
<detectLinks default-value="false">${detectLinks}</detectLinks>
<detectOfflineLinks default-value="true">${detectOfflineLinks}</detectOfflineLinks>
<docencoding default-value="${project.reporting.outputEncoding}">${docencoding}</docencoding>
<docfilessubdirs default-value="false">${docfilessubdirs}</docfilessubdirs>
<doclet>${doclet}</doclet>
<docletArtifact>${docletArtifact}</docletArtifact>
<docletArtifacts>${docletArtifacts}</docletArtifacts>
<docletPath>${docletPath}</docletPath>
<doctitle default-value="${project.name} ${project.version} API">${doctitle}</doctitle>
<encoding default-value="${project.build.sourceEncoding}">${encoding}</encoding>
<excludePackageNames>${excludePackageNames}</excludePackageNames>
<excludedocfilessubdir>${excludedocfilessubdir}</excludedocfilessubdir>
<extdirs>${extdirs}</extdirs>
<failOnError default-value="true">${maven.javadoc.failOnError}</failOnError>
<finalName>${project.build.finalName}</finalName>
<footer>${footer}</footer>
<groups>${groups}</groups>
<header>${header}</header>
<helpfile>${helpfile}</helpfile>
<includeDependencySources default-value="false"/>
<includeTransitiveDependencySources default-value="false"/>
<isOffline default-value="${settings.offline}"/>
<jarOutputDirectory>${project.build.directory}</jarOutputDirectory>
<javaApiLinks>${javaApiLinks}</javaApiLinks>
<javadocDirectory>${basedir}/src/main/javadoc</javadocDirectory>
<javadocExecutable>${javadocExecutable}</javadocExecutable>
<javadocOptionsDir default-value="${project.build.directory}/javadoc-bundle-options"/>
<javadocVersion>${javadocVersion}</javadocVersion>
<keywords default-value="false">${keywords}</keywords>
<links>${links}</links>
<linksource default-value="false">${linksource}</linksource>
<localRepository>${localRepository}</localRepository>
<locale>${locale}</locale>
<maxmemory>${maxmemory}</maxmemory>
<minmemory>${minmemory}</minmemory>
<nocomment default-value="false">${nocomment}</nocomment>
<nodeprecated default-value="false">${nodeprecated}</nodeprecated>
<nodeprecatedlist default-value="false">${nodeprecatedlist}</nodeprecatedlist>
<nohelp default-value="false">${nohelp}</nohelp>
<noindex default-value="false">${noindex}</noindex>
<nonavbar default-value="false">${nonavbar}</nonavbar>
<nooverview default-value="false">${nooverview}</nooverview>
<noqualifier>${noqualifier}</noqualifier>
<nosince default-value="false">${nosince}</nosince>
<notimestamp default-value="false">${notimestamp}</notimestamp>
<notree default-value="false">${notree}</notree>
<offlineLinks>${offlineLinks}</offlineLinks>
<old default-value="false">${old}</old>
<outputDirectory default-value="${project.build.directory}/apidocs">${destDir}</outputDirectory>
<overview default-value="${basedir}/src/main/javadoc/overview.html">${overview}</overview>
<packagesheader>${packagesheader}</packagesheader>
<project>${project}</project>
<proxyHost>${proxyHost}</proxyHost>
<proxyPort>${proxyPort}</proxyPort>
<quiet default-value="false">${quiet}</quiet>
<reactorProjects>${reactorProjects}</reactorProjects>
<remoteRepositories>${project.remoteArtifactRepositories}</remoteRepositories>
<resourcesArtifacts>${resourcesArtifacts}</resourcesArtifacts>
<serialwarn default-value="false">${serialwarn}</serialwarn>
<session>${session}</session>
<settings default-value="${settings}"/>
<show default-value="protected">${show}</show>
<skip default-value="false">${maven.javadoc.skip}</skip>
<source>${source}</source>
<sourceDependencyCacheDir default-value="${project.build.directory}/distro-javadoc-sources"/>
<sourcepath>${sourcepath}</sourcepath>
<sourcetab>${sourcetab}</sourcetab>
<splitindex default-value="false">${splitindex}</splitindex>
<stylesheet default-value="java">${stylesheet}</stylesheet>
<stylesheetfile>${stylesheetfile}</stylesheetfile>
<subpackages>${subpackages}</subpackages>
<taglet>${taglet}</taglet>
<tagletArtifact>${tagletArtifact}</tagletArtifact>
<tagletArtifacts>${tagletArtifacts}</tagletArtifacts>
<tagletpath>${tagletpath}</tagletpath>
<taglets>${taglets}</taglets>
<tags>${tags}</tags>
<top>${top}</top>
<use default-value="true">${use}</use>
<useDefaultManifestFile default-value="false"/>
<useStandardDocletOptions default-value="true">${useStandardDocletOptions}</useStandardDocletOptions>
<validateLinks default-value="false">${validateLinks}</validateLinks>
<verbose default-value="false">${verbose}</verbose>
<version default-value="true">${version}</version>
<windowtitle default-value="${project.name} ${project.version} API">${windowtitle}</windowtitle>
</configuration>
[DEBUG] =======================================================================
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=0, ConflictMarker.markTime=0, ConflictMarker.nodeCount=2, ConflictIdSorter.graphTime=0, ConflictIdSorter.topsortTime=0, ConflictIdSorter.conflictIdCount=1, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=0, ConflictResolver.conflictItemCount=1, DefaultDependencyCollector.collectTime=1, DefaultDependencyCollector.transformTime=0}
[DEBUG] org.apache.derby:derbynet:jar:10.12.1.1.mod.1
[DEBUG] org.apache.derby:derby:jar:10.12.1.1.mod.1:compile
[DEBUG] Using transporter WagonTransporter with priority -1.0 for https://repo.maven.apache.org/maven2
[DEBUG] Using connector BasicRepositoryConnector with priority 0.0 for https://repo.maven.apache.org/maven2
Downloading: https://repo.maven.apache.org/maven2/org/apache/derby/derby/10.12.1.1.mod.1/derby-10.12.1.1.mod.1.jar
[DEBUG] Writing tracking file /Users/tester/.m2/repository/org/apache/derby/derby/10.12.1.1.mod.1/derby-10.12.1.1.mod.1.jar.lastUpdated
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Apache Derby Project ............................... SUCCESS [ 57.391 s]
[INFO] Apache Derby Database Engine and Embedded JDBC Driver SUCCESS [ 2.615 s]
[INFO] Apache Derby Network Server ........................ FAILURE [ 0.264 s]
[INFO] Apache Derby Client JDBC Driver .................... SKIPPED
[INFO] Apache Derby Tools ................................. SKIPPED
[INFO] Apache Derby Optional Tools ........................ SKIPPED
[INFO] Apache Derby Network Server admin demonstration servlet SKIPPED
[INFO] Apache Derby messages: Czech ....................... SKIPPED
[INFO] Apache Derby messages: German ...................... SKIPPED
[INFO] Apache Derby messages: Spanish ..................... SKIPPED
[INFO] Apache Derby messages: French ...................... SKIPPED
[INFO] Apache Derby messages: Hungarian ................... SKIPPED
[INFO] Apache Derby messages: Italian ..................... SKIPPED
[INFO] Apache Derby messages: Japanese .................... SKIPPED
[INFO] Apache Derby messages: Korean ...................... SKIPPED
[INFO] Apache Derby messages: Polish ...................... SKIPPED
[INFO] Apache Derby messages: Portuguese (Brazilian) ...... SKIPPED
[INFO] Apache Derby messages: Russian ..................... SKIPPED
[INFO] Apache Derby messages: Chinese (Simplified) ........ SKIPPED
[INFO] Apache Derby messages: Chinese (Traditional) ....... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:21 min
[INFO] Finished at: 2015-12-29T16:37:25+11:00
[INFO] Final Memory: 16M/159M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project derbynet: Could not resolve dependencies for project org.apache.derby:derbynet:jar:10.12.1.1.mod.1: Could not find artifact org.apache.derby:derby:jar:10.12.1.1.mod.1 in central ( https://repo.maven.apache.org/maven2) -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project derbynet: Could not resolve dependencies for project org.apache.derby:derbynet:jar:10.12.1.1.mod.1: Could not find artifact org.apache. derby:derby:jar:10.12.1.1.mod.1 in central (https://repo.maven.apache.org/maven2)
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(LifecycleDependencyResolver.java:221)
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveProjectDependencies(LifecycleDependencyResolver.java:127)
at org.apache.maven.lifecycle.internal.MojoExecutor.ensureDependenciesAreResolved(MojoExecutor.java:257)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:200)
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:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
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:497)
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.project.DependencyResolutionException: Could not resolve dependencies for project org.apache.derby:derbynet:jar:10.12.1.1.mod.1: Could not find artifact org.apache.derby:derby:jar:10.12.1.1.mod.1 in central (https://repo.maven.apache.org/maven2)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:211)
at org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(LifecycleDependencyResolver.java:195)
... 23 more
Caused by: org.eclipse.aether.resolution.DependencyResolutionException: Could not find artifact org.apache.derby:derby:jar:10.12.1.1.mod.1 in central (https://repo.maven.apache.org/maven2)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:384)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:205)
... 24 more
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not find artifact org.apache.derby:derby:jar:10.12.1.1.mod.1 in central (https://repo.maven.apache.org/maven2)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:444)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:367)
... 25 more
Caused by: org.eclipse.aether.transfer.ArtifactNotFoundException: Could not find artifact org.apache.derby:derby:jar:10.12.1.1.mod.1 in central (https://repo.maven.apache.org/maven2)
at org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:39)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:355)
at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:581)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:249)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:520)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
... 27 more
好的，所以构建derbynet依赖于derby，这很好，但我不明白为什么它必须使用存储库中的 jar。如果我mvn package改为运行，即使编译和构建 Javadoc 具有相同的依赖项要求，它仍然有效。
那么为什么不起作用javadoc:jar呢？