Details
-
Type:
Bug
-
Status: Open
-
Priority:
Major
-
Resolution: Unresolved
-
Affects Version/s: 3.1
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Fix Version/s: None
-
Labels:None
Description
When we do clean -> compile -> compile, all Java sources are re-compiled for second compilation steps:
[framework]$ mvn clean ... [framework]$ mvn compile ... [INFO] --- maven-compiler-plugin:3.1:compile (precompile-sources-for-cdk) @ richfaces-framework --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 915 source files to /mnt/workspace/workspaces/richfaces/richfaces5/framework/target/classes ... [framework]$ mvn compile ... [INFO] --- maven-compiler-plugin:3.1:compile (precompile-sources-for-cdk) @ richfaces-framework --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 915 source files to /mnt/workspace/workspaces/richfaces/richfaces5/framework/target/classes ...
The source code of the affected project: https://github.com/richfaces/richfaces5/tree/077dcfc0a46d03d7ba9a7ac3e701a4adfb834c71
Issue Links
- is related to
-
MCOMPILER-194
Strange effects with springs @Configurable (AspectJ) and new compiler plugin version 3.0
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- Open
-
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MCOMPILER-187
incremental stuff detect changes even if nothing has changed means too much compilation
-
- Closed
-
Activity
- All
- Comments
- Work Log
- History
- Activity
- Transitions
The root cause of this issue seems handling of resources in src/main/java that do not end up generating a .class file under target/classes.
That make sense. Our requirement was storing the XML files side-by-side the Java files so they are easily accessible by contributors. Would you consider it valid use case?
xml files are resources, in maven world they should be stored under src/main/resources...
It's recommended, but not required, and sometimes there are different requirements.
I have this issue compiling Play! Framework project. There is requirement for all sources and resources be placed in "app" directory (see http://www.playframework.com/documentation/1.2.5/guide1 and http://www.playframework.com/documentation/2.0/Anatomy).
I'm using Maven plugin for Play! Framework (http://code.google.com/p/maven-play-plugin/) to build Play! projects.
use <excludes> to exclude those files from incremental analysis.
I've a similar problem. I've attached hello as a sample project.
When i do mvn clean compile; mvn compile nothing compiles as expected.
But when i change only one java file, plugin compiles all module.
hello$ mvn clean compile
...
hello$ echo " " >> src/main/java/com/mycompany/hello/Hello.java
hello$ mvn -X compile
Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 15:51:28+0200)
Maven home: /home/osman/dev/tools/maven
Java version: 1.7.0_21, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.5.0-27-generic", arch: "amd64", family: "unix"
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from /home/osman/dev/tools/maven/conf/settings.xml
[DEBUG] Reading user settings from /home/osman/.m2/settings.xml
[DEBUG] Using local repository at /home/osman/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /home/osman/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project com.mycompany:hello:jar:1.0-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: com.mycompany:hello:jar:1.0-SNAPSHOT
[DEBUG] Tasks: [compile]
[DEBUG] Style: Regular
[DEBUG] =======================================================================
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building hello 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[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] 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] 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: com.mycompany:hello:1.0-SNAPSHOT
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): [compile]
[DEBUG] Repositories (dependencies): [central (http://repo.maven.apache.org/maven2, releases)]
[DEBUG] Repositories (plugins) : [central (http://repo.maven.apache.org/maven2, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal: org.apache.maven.plugins:maven-resources-plugin:2.5:resources (default-resources)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
<buildFilters default-value="$
"/>
<encoding default-value="$
<escapeString>${maven.resources.escapeString}</escapeString>
<escapeWindowsPaths default-value="true">${maven.resources.escapeWindowsPaths}</escapeWindowsPaths>
<includeEmptyDirs default-value="false">${maven.resources.includeEmptyDirs}</includeEmptyDirs>
<outputDirectory default-value="${project.build.outputDirectory}"/>
<overwrite default-value="false">${maven.resources.overwrite}</overwrite>
<project default-value="${project}"/>
<resources default-value="${project.resources}"/>
<session default-value="${session}"/>
<supportMultiLineFiltering default-value="false">${maven.resources.supportMultiLineFiltering}</supportMultiLineFiltering>
<useBuildFilters default-value="true"/>
<useDefaultDelimiters default-value="true"/>
</configuration>
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal: org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
<basedir default-value="${basedir}"/>
<buildDirectory default-value="${project.build.directory}"/>
<classpathElements default-value="${project.compileClasspathElements}"/>
<compileSourceRoots default-value="${project.compileSourceRoots}"/>
<compilerId default-value="javac">${maven.compiler.compilerId}</compilerId>
<compilerReuseStrategy default-value="${reuseCreated}">${maven.compiler.compilerReuseStrategy}</compilerReuseStrategy>
<compilerVersion>${maven.compiler.compilerVersion}</compilerVersion>
<debug default-value="true">${maven.compiler.debug}</debug>
<debuglevel>${maven.compiler.debuglevel}</debuglevel>
<encoding default-value="${project.build.sourceEncoding}
">UTF-8</encoding>
<executable>$
</executable>
<failOnError default-value="true">$
</failOnError>
<forceJavacCompilerUse default-value="false">true</forceJavacCompilerUse>
<fork default-value="false">$
</fork>
<generatedSourcesDirectory default-value="$
/generated-sources/annotations"/>
<maxmem>$
</maxmem>
<meminitial>$
</meminitial>
<mojoExecution>$
</mojoExecution>
<optimize default-value="false">$
</optimize>
<outputDirectory default-value="$
"/>
<projectArtifact default-value="$
"/>
<showDeprecation default-value="false">$
</showDeprecation>
<showWarnings default-value="false">$
</showWarnings>
<skipMain>$
</skipMain>
<skipMultiThreadWarning default-value="false">$
</skipMultiThreadWarning>
<source default-value="1.5">1.6</source>
<staleMillis default-value="0">$
</staleMillis>
<target default-value="1.5">1.6</target>
<useIncrementalCompilation default-value="true">$
</useIncrementalCompilation>
<verbose default-value="false">$
</verbose>
<mavenSession default-value="$
<session default-value="${session}
"/>
</configuration>
[DEBUG] =======================================================================
[DEBUG] com.mycompany:hello:jar:1.0-SNAPSHOT
[DEBUG] junit:junit:jar:4.11:test
[DEBUG] org.hamcrest:hamcrest-core:jar:1.3:test
[INFO]
[INFO] — maven-resources-plugin:2.5:resources (default-resources) @ hello —
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG] Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG] Imported: org.sonatype.aether.transfer < plexus.core
[DEBUG] Imported: org.apache.maven.exception < plexus.core
[DEBUG] Imported: org.sonatype.aether.metadata < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG] Imported: org.sonatype.aether.collection < plexus.core
[DEBUG] Imported: org.sonatype.aether.version < plexus.core
[DEBUG] Imported: org.apache.maven.monitor < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG] Imported: org.apache.maven.repository < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG] Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG] Imported: org.apache.maven.profiles < plexus.core
[DEBUG] Imported: org.sonatype.aether.repository < plexus.core
[DEBUG] Imported: org.apache.maven.classrealm < plexus.core
[DEBUG] Imported: org.apache.maven.execution < plexus.core
[DEBUG] Imported: org.sonatype.aether.artifact < plexus.core
[DEBUG] Imported: org.sonatype.aether.spi < plexus.core
[DEBUG] Imported: org.apache.maven.reporting < plexus.core
[DEBUG] Imported: org.apache.maven.usability < plexus.core
[DEBUG] Imported: org.codehaus.plexus.container < plexus.core
[DEBUG] Imported: org.codehaus.plexus.component < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG] Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG] Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG] Imported: org.sonatype.aether.graph < plexus.core
[DEBUG] Imported: org.sonatype.aether.* < plexus.core
[DEBUG] Imported: org.apache.maven.settings < plexus.core
[DEBUG] Imported: org.codehaus.classworlds < plexus.core
[DEBUG] Imported: org.sonatype.aether.impl < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG] Imported: org.apache.maven.toolchain < plexus.core
[DEBUG] Imported: org.sonatype.aether.deployment < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core
[DEBUG] Imported: org.apache.maven.configuration < plexus.core
[DEBUG] Imported: org.apache.maven.cli < plexus.core
[DEBUG] Imported: org.sonatype.aether.installation < plexus.core
[DEBUG] Imported: org.codehaus.plexus.context < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG] Imported: org.apache.maven.project < plexus.core
[DEBUG] Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG] Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG] Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG] Imported: org.apache.maven.artifact < plexus.core
[DEBUG] Imported: org.apache.maven.model < plexus.core
[DEBUG] Imported: org.apache.maven.* < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG] Imported: org.sonatype.aether.resolution < plexus.core
[DEBUG] Imported: org.apache.maven.plugin < plexus.core
[DEBUG] Imported: org.codehaus.plexus.* < plexus.core
[DEBUG] Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG] Populating class realm maven.api
[DEBUG] org.apache.maven.plugins:maven-resources-plugin:jar:2.5:
[DEBUG] org.apache.maven:maven-plugin-api:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-project:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-profile:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-artifact-manager:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-plugin-registry:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-core:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6:compile
[DEBUG] org.apache.maven.reporting:maven-reporting-api:jar:2.0.6:compile
[DEBUG] org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7:compile
[DEBUG] org.apache.maven:maven-repository-metadata:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-error-diagnostics:jar:2.0.6:compile
[DEBUG] commons-cli:commons-cli:jar:1.0:compile
[DEBUG] org.apache.maven:maven-plugin-descriptor:jar:2.0.6:compile
[DEBUG] org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4:compile
[DEBUG] classworlds:classworlds:jar:1.1:compile
[DEBUG] org.apache.maven:maven-artifact:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-settings:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-model:jar:2.0.6:compile
[DEBUG] org.apache.maven:maven-monitor:jar:2.0.6:compile
[DEBUG] org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9-stable-1:compile
[DEBUG] junit:junit:jar:3.8.1:compile
[DEBUG] org.codehaus.plexus:plexus-utils:jar:2.0.5:compile
[DEBUG] org.apache.maven.shared:maven-filtering:jar:1.0:compile
[DEBUG] org.sonatype.plexus:plexus-build-api:jar:0.0.4:compile
[DEBUG] org.codehaus.plexus:plexus-interpolation:jar:1.13:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
[DEBUG] Imported: < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
[DEBUG] Included: org.apache.maven.plugins:maven-resources-plugin:jar:2.5
[DEBUG] Included: org.apache.maven.reporting:maven-reporting-api:jar:2.0.6
[DEBUG] Included: org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7
[DEBUG] Included: commons-cli:commons-cli:jar:1.0
[DEBUG] Included: org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4
[DEBUG] Included: junit:junit:jar:3.8.1
[DEBUG] Included: org.codehaus.plexus:plexus-utils:jar:2.0.5
[DEBUG] Included: org.apache.maven.shared:maven-filtering:jar:1.0
[DEBUG] Included: org.sonatype.plexus:plexus-build-api:jar:0.0.4
[DEBUG] Included: org.codehaus.plexus:plexus-interpolation:jar:1.13
[DEBUG] Excluded: org.apache.maven:maven-plugin-api:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-project:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-profile:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-artifact-manager:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-plugin-registry:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-core:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-repository-metadata:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-error-diagnostics:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-plugin-descriptor:jar:2.0.6
[DEBUG] Excluded: classworlds:classworlds:jar:1.1
[DEBUG] Excluded: org.apache.maven:maven-artifact:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-settings:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-model:jar:2.0.6
[DEBUG] Excluded: org.apache.maven:maven-monitor:jar:2.0.6
[DEBUG] Excluded: org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9-stable-1
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-resources-plugin:2.5:resources from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-resources-plugin:2.5, parent: sun.misc.Launcher$AppClassLoader@5eab4b89]
[debug] execute contextualize
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-resources-plugin:2.5:resources' with basic configurator -->
[DEBUG] (f) buildFilters = []
[DEBUG] (f) encoding = UTF-8
[DEBUG] (f) escapeWindowsPaths = true
[DEBUG] (s) includeEmptyDirs = false
[DEBUG] (s) outputDirectory = /home/osman/NetBeansProjects/hello/target/classes
[DEBUG] (s) overwrite = false
[DEBUG] (f) project = MavenProject: com.mycompany:hello:1.0-SNAPSHOT @ /home/osman/NetBeansProjects/hello/pom.xml
[DEBUG] (s) resources = [Resource {targetPath: null, filtering: false, FileSet {directory: /home/osman/NetBeansProjects/hello/src/main/resources, PatternSet [includes: {}, excludes: {}]}}]
[DEBUG] (f) session = org.apache.maven.execution.MavenSession@65843e29
[DEBUG] (f) supportMultiLineFiltering = false
[DEBUG] (f) useBuildFilters = true
[DEBUG] (s) useDefaultDelimiters = true
[DEBUG] – end configuration –
[DEBUG] properties used
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[DEBUG] resource with targetPath null
directory /home/osman/NetBeansProjects/hello/src/main/resources
excludes []
includes []
[INFO] skip non existing resourceDirectory /home/osman/NetBeansProjects/hello/src/main/resources
[DEBUG] no use filter components
[INFO]
[INFO] — maven-compiler-plugin:3.1:compile (default-compile) @ hello —
[DEBUG] org.apache.maven.plugins:maven-compiler-plugin:jar:3.1:
[DEBUG] org.apache.maven:maven-plugin-api:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-artifact:jar:2.0.9:compile
[DEBUG] org.codehaus.plexus:plexus-utils:jar:1.5.1:compile
[DEBUG] org.apache.maven:maven-core:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-settings:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-profile:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-model:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-repository-metadata:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-error-diagnostics:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-project:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-plugin-registry:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-plugin-descriptor:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-artifact-manager:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-monitor:jar:2.0.9:compile
[DEBUG] org.apache.maven:maven-toolchain:jar:1.0:compile
[DEBUG] org.apache.maven.shared:maven-shared-utils:jar:0.1:compile
[DEBUG] com.google.code.findbugs:jsr305:jar:2.0.1:compile
[DEBUG] org.apache.maven.shared:maven-shared-incremental:jar:1.1:compile
[DEBUG] org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile
[DEBUG] org.codehaus.plexus:plexus-compiler-api:jar:2.2:compile
[DEBUG] org.codehaus.plexus:plexus-compiler-manager:jar:2.2:compile
[DEBUG] org.codehaus.plexus:plexus-compiler-javac:jar:2.2:runtime
[DEBUG] org.codehaus.plexus:plexus-container-default:jar:1.5.5:compile
[DEBUG] org.codehaus.plexus:plexus-classworlds:jar:2.2.2:compile
[DEBUG] org.apache.xbean:xbean-reflect:jar:3.4:compile
[DEBUG] log4j:log4j:jar:1.2.12:compile
[DEBUG] commons-logging:commons-logging-api:jar:1.1:compile
[DEBUG] com.google.collections:google-collections:jar:1.0:compile
[DEBUG] junit:junit:jar:3.8.2:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG] Imported: < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG] Included: org.apache.maven.plugins:maven-compiler-plugin:jar:3.1
[DEBUG] Included: org.codehaus.plexus:plexus-utils:jar:1.5.1
[DEBUG] Included: org.apache.maven.shared:maven-shared-utils:jar:0.1
[DEBUG] Included: com.google.code.findbugs:jsr305:jar:2.0.1
[DEBUG] Included: org.apache.maven.shared:maven-shared-incremental:jar:1.1
[DEBUG] Included: org.codehaus.plexus:plexus-component-annotations:jar:1.5.5
[DEBUG] Included: org.codehaus.plexus:plexus-compiler-api:jar:2.2
[DEBUG] Included: org.codehaus.plexus:plexus-compiler-manager:jar:2.2
[DEBUG] Included: org.codehaus.plexus:plexus-compiler-javac:jar:2.2
[DEBUG] Included: org.apache.xbean:xbean-reflect:jar:3.4
[DEBUG] Included: log4j:log4j:jar:1.2.12
[DEBUG] Included: commons-logging:commons-logging-api:jar:1.1
[DEBUG] Included: com.google.collections:google-collections:jar:1.0
[DEBUG] Included: junit:junit:jar:3.8.2
[DEBUG] Excluded: org.apache.maven:maven-plugin-api:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-artifact:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-core:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-settings:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-profile:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-model:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-repository-metadata:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-error-diagnostics:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-project:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-plugin-registry:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-plugin-descriptor:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-artifact-manager:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-monitor:jar:2.0.9
[DEBUG] Excluded: org.apache.maven:maven-toolchain:jar:1.0
[DEBUG] Excluded: org.codehaus.plexus:plexus-container-default:jar:1.5.5
[DEBUG] Excluded: org.codehaus.plexus:plexus-classworlds:jar:2.2.2
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-compiler-plugin:3.1:compile from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1, parent: sun.misc.Launcher$AppClassLoader@5eab4b89]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-compiler-plugin:3.1:compile' with basic configurator -->
[DEBUG] (f) basedir = /home/osman/NetBeansProjects/hello
[DEBUG] (f) buildDirectory = /home/osman/NetBeansProjects/hello/target
[DEBUG] (f) classpathElements = [/home/osman/NetBeansProjects/hello/target/classes]
[DEBUG] (f) compileSourceRoots = [/home/osman/NetBeansProjects/hello/src/main/java]
[DEBUG] (f) compilerId = javac
[DEBUG] (f) debug = true
[DEBUG] (f) encoding = UTF-8
[DEBUG] (f) failOnError = true
[DEBUG] (f) forceJavacCompilerUse = true
[DEBUG] (f) fork = false
[DEBUG] (f) generatedSourcesDirectory = /home/osman/NetBeansProjects/hello/target/generated-sources/annotations
[DEBUG] (f) mojoExecution = org.apache.maven.plugins:maven-compiler-plugin:3.1:compile
[DEBUG] (f) optimize = false
[DEBUG] (f) outputDirectory = /home/osman/NetBeansProjects/hello/target/classes
[DEBUG] (f) projectArtifact = com.mycompany:hello:jar:1.0-SNAPSHOT
[DEBUG] (f) showDeprecation = false
[DEBUG] (f) showWarnings = false
[DEBUG] (f) skipMultiThreadWarning = false
[DEBUG] (f) source = 1.6
[DEBUG] (f) staleMillis = 0
[DEBUG] (f) target = 1.6
[DEBUG] (f) useIncrementalCompilation = true
[DEBUG] (f) verbose = false
[DEBUG] (f) mavenSession = org.apache.maven.execution.MavenSession@65843e29
[DEBUG] (f) session = org.apache.maven.execution.MavenSession@65843e29
[DEBUG] – end configuration –
[DEBUG] Using compiler 'javac'.
[DEBUG] Source directories: [/home/osman/NetBeansProjects/hello/src/main/java]
[DEBUG] Classpath: [/home/osman/NetBeansProjects/hello/target/classes]
[DEBUG] Output directory: /home/osman/NetBeansProjects/hello/target/classes
[DEBUG] CompilerReuseStrategy: reuseCreated
[DEBUG] useIncrementalCompilation enabled
[DEBUG] Stale source detected: /home/osman/NetBeansProjects/hello/src/main/java/com/mycompany/hello/Hello.java
[INFO] Changes detected - recompiling the module!
[DEBUG] Classpath:
[DEBUG] /home/osman/NetBeansProjects/hello/target/classes
[DEBUG] Source roots:
[DEBUG] /home/osman/NetBeansProjects/hello/src/main/java
[DEBUG] Command line options:
[DEBUG] -d /home/osman/NetBeansProjects/hello/target/classes -classpath /home/osman/NetBeansProjects/hello/target/classes: -sourcepath /home/osman/NetBeansProjects/hello/src/main/java: /home/osman/NetBeansProjects/hello/src/main/java/com/mycompany/hello/App.java /home/osman/NetBeansProjects/hello/src/main/java/com/mycompany/hello/Hello.java -s /home/osman/NetBeansProjects/hello/target/generated-sources/annotations -g -nowarn -target 1.6 -source 1.6 -encoding UTF-8
[DEBUG] incrementalBuildHelper#beforeRebuildExecution
[INFO] Compiling 2 source files to /home/osman/NetBeansProjects/hello/target/classes
[DEBUG] incrementalBuildHelper#afterRebuildExecution
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.145s
[INFO] Finished at: Mon Apr 29 12:07:43 EEST 2013
[INFO] Final Memory: 14M/108M
[INFO] ------------------------------------------------------------------------
I'm seeing same with Commons builds.
Looks like it might be due to the new way of defining Javadoc for packages:
useIncrementalCompilation enabled
Stale source detected: D:\eclipseworkspaces\main\commons-net\src\main\java\org\apache\commons\net\whois\package-info.java
Stale source detected: D:\eclipseworkspaces\main\commons-net\src\main\java\org\apache\commons\net\imap\package-info.java
Stale source detected: D:\eclipseworkspaces\main\commons-net\src\main\java\org\apache\commons\net\finger\package-info.java
Stale source detected: D:\eclipseworkspaces\main\commons-net\src\main\java\org\apache\commons\net\tftp\package-info.java
Since these never rarely generate .class files, they will always usually cause the compile to be re-run
Just to be precise, package-info.java can generate .class files, e.g. if they contain package annotations. So these sources shouldn't just be plainly neglected.
I'd forgotten about annotations.
Ordinary Java source files may depend on each other, and therefore multiple files may need to be compiled if one source file changes.
Is that true of package-info files, or are they independent?
If so, there is no need to recompile anything else if one is found to be out of date, only the p-i file itself.
This would reduce the recompilation needed.
Ideally the package-info files would not be recompiled either if they won't generate class files, but that may be much harder to detect.
Undesirable workrounds include: don't use p-i files; ensure every p-i file contains a package annotation.
Ant had an issue with the package-info.java files and solved it by creating empty class files if the javac compiler failed to do so. This is (now) optional behaviour.
See https://issues.apache.org/bugzilla/show_bug.cgi?id=52096 for a useful discussion.
It points out that JDK 7 javac has the option -Xpkginfo:always
The difference with Ant is that it does not recompile everything just because a single p-i file is out of date.
That's an optimisation that Maven could easily implement.
[For completeness]
A work-round is to ensure that p-i files always generate output.
One way to do this is to add an annotation.
Unfortunately it appears that the only annotation which is guaranteed to be available in Java 1.5+ is @Deprecated, which is obviously unsuitable. But it is possible to create a dummy annotation, as follows:
@Retention(RetentionPolicy.SOURCE) public @interface PackageMarker { }
/**
* Example Package Javadoc
*/
@PackageMarker
package example;
This work-round is suitable for projects that have a mix of p-i files, some of which already use annotations.
Excluding the p-i files from compilation is only suitable if the p-i files contain Javadoc only.
Note that version 2.5.1 does not suffer from this problem; it only recompiles the package_info.java files - they do not cause the entire project to be recompiled.
3.0 and 3.1 are broken.
What if maven-compiler-plugin generates package-info.class files if the compilation was successful and package-info.class is missing for a particular package-info.java?
FAILURE: Integrated in Hadoop-trunk-Commit #8127 (See https://builds.apache.org/job/Hadoop-trunk-Commit/8127/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
- hadoop-common-project/hadoop-common/CHANGES.txt
FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #250 (See https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/250/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
- hadoop-common-project/hadoop-common/CHANGES.txt
FAILURE: Integrated in Hadoop-Yarn-trunk #980 (See https://builds.apache.org/job/Hadoop-Yarn-trunk/980/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
- hadoop-common-project/hadoop-common/CHANGES.txt
FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #248 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/248/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
- hadoop-common-project/hadoop-common/CHANGES.txt
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2196 (See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2196/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/CHANGES.txt
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
FAILURE: Integrated in Hadoop-Hdfs-trunk #2177 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk/2177/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
- hadoop-common-project/hadoop-common/CHANGES.txt
FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #238 (See https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/238/)
HADOOP-12195. Add annotation to package-info.java file to workaround MCOMPILER-205. (wang: rev 3dc92e84c2a530483c6a7693817b67d86f9c97aa)
- hadoop-common-project/hadoop-common/CHANGES.txt
- hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/jmx/package-info.java
Github user kennknowles closed the pull request at:
With useIncrementalCompilation on false, when changed sources are found, only they are recompiled.
With useIncrementalCompilation on true, when changed sources are found, everything is recompiled. Why?
The attached patch tries to only recompile the changed sources. It seems to work - but only on every second build. Someone more familiar with the code needs to have a look.
This also works: delete files named "package-info.java" from the list of stale files.
Deleting package-info.java from the list of stale files avoids recompiling the module every time, but still recompiles every file if anything changes.
instead of adding a dummy annotation to each package-info.java I changed the compiler configuration to
<compilerArgs>
<arg>-Xpkginfo:always</arg>
</compilerArgs>
which worked. Also running mvn compile -X will output which files are stale. This helped me to find an empty java file that would also be treated as stale source.
Attaching the IT from original
MCOMPILER-187