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Hudson commented on MCOMPILER-211: ---------------------------------- FAILURE: Integrated in maven-plugins #4923 (See [https://builds.apache.org/job/maven-plugins/4923/]) [MCOMPILER-211] Prevent possible NPE when m-compiler-p is used within an m2e-execution in Eclipse (agudian: [http://svn.apache.org/viewvc/?view=rev&rev=1721738]) * maven-compiler-plugin/src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java > Compiler plugin (3.x) fails in eclipse > -------------------------------------- > > Key: MCOMPILER-211 > URL: https://issues.apache.org/jira/browse/MCOMPILER-211 > Project: Maven Compiler Plugin > Issue Type: Bug > Environment: Maven-Compiler-Plugin: 3.1 (and maybe 3.0) > Eclipse tycho compiler: 0.18.1 > Eclipse: Kepler 20130614-0229 > m2e: 1.4.0.20130601-0317 > Reporter: Denis Günther > Assignee: Andreas Gudian > Fix For: 3.5 > > > Hi there, > A few days ago we updated our eclipse to the new kepler version (also m2e) > and decided to raise the maven-compiler-plugin version to the current one > (3.1). After changing that, everything seemed to work fine, till some > developers mentioned compile errors in the projects. > Since m2e only marked the pom.xml of the projects, without any useful > exception, i debugged the problem and found a NullPointerException in the > maven-compiler-plugin. > Since version 3.x there is a method called "isDependencyChanged" in the > "AbstractCompilerMojo" class. This method calls another method called > "getBuildStartTime". The getBuildStartTime method works fine, making some > reflection calls to the MavenExecutionRequest to get its start time. > Unfortunatly this time (Date object) never will be set (only in eclipse using > m2e, running maven seems to work fine), so getBuildStartTime will return > null. The null-value will be handed over (line 1166) to the method > "hasNewFile" which fails (line 1192) when asking for "getTime". > I didn't test the compiler-plugin 3.0, but i checked the source and this part > seemed to be identical. We switched back to version 2.5.1 where the method > does not exist - eventhing works again. > Here is the buggy definition of our parent pom. > <pluginManagement> > <plugins> > <plugin> > <artifactId>maven-compiler-plugin</artifactId> > <version>3.1</version> > <configuration> > <compilerVersion>1.7</compilerVersion> > <source>1.7</source> > <target>1.7</target> > <compilerId>jdt</compilerId> > <compilerArguments> > <verbose /> > </compilerArguments> > </configuration> > <dependencies> > <dependency> > <groupId>org.eclipse.tycho</groupId> > <artifactId>tycho-compiler-jdt</artifactId> > <version>0.18.1</version> > </dependency> > </dependencies> > </plugin> > </plugins> > </pluginManagement> > You also have to add a lifecycle mapping for m2e and change it from "ignore" > to "execute". I didn't post this code since it comes with a quickfix. > Be sure the parent pom is not in a open project when checking this problem. > Just install the pom, close the project and refresh all other ones, using the > pom. Sometimes everything works if the pom-project is checked out and open > (not every time). > kind regards > Denis -- This message was sent by Atlassian JIRA (v6.3.4#6332)