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Re: [m2e-dev] m2e 1.4.0 strance classloader bug 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=422106

On April 8, 2014 3:03:10 PM GMT+04:00, Grzegorz Slowikowski <gslowikowski@xxxxxxxxx> wrote:
>Igor, can you give me a link to this bug? I would like to add a note
>about
>it.
>
>Thank you.
>Grzegorz
>
>
>
>2014-04-08 12:57 GMT+02:00 Grzegorz Slowikowski
><gslowikowski@xxxxxxxxx>:
>
>> OK, I think this closes this thread. Thank you.
>>
>> Grzegorz
>>
>>
>>
>> 2014-04-08 12:55 GMT+02:00 Igor Fedorenko <igor@xxxxxxxxxxxxxx>:
>>
>> There was a bug and the bug was fixed in m2e 1.5M4. If you want to
>take
>>> advantage of the fix, you need to update m2e.
>>>
>>> --
>>> Regards,
>>> Igor
>>>
>>>
>>> On 2014-04-08, 14:30, Grzegorz Słowikowski wrote:
>>>
>>>> Hi
>>>>
>>>> I have M2E 1.5.0.20131127-1501 installed and it contains
>"plexus-utils"
>>>> 3.0.15
>>>> so there should not be any problems, but:
>>>>
>>>> 1. If the classloader separation is not implemented properly (maybe
>in
>>>> 1.5 it is, I don't know)
>>>> similar problem may arise again some day.
>>>>
>>>> 2. I need 1.4.0 because I need Scala IDE (I have to write howto for
>my
>>>> plugin's users
>>>> and it must be as simple as possible) and latest Scala IDE 3.0.3
>bundle
>>>> (http://scala-ide.org/download/sdk.html)
>>>> has M2E 1.4.
>>>> Now I will downgrade "plexus-utils" version in my plugin's pom.xml,
>but
>>>> is there better solution,
>>>> when still using M2E 1.4?
>>>>
>>>> Regards
>>>> Grzegorz
>>>>
>>>> On 2014-04-08 11:45, Igor Fedorenko wrote:
>>>>
>>>>> Sounds like bug 422106 [1], see if m2e 1.5 M6 or latest snapshot
>work
>>>>> better.
>>>>>
>>>>> [1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=422106
>>>>>
>>>>> --
>>>>> Regards,
>>>>> Igor
>>>>>
>>>>> On 2014-04-08, 13:21, Grzegorz Słowikowski wrote:
>>>>>
>>>>>> Hi
>>>>>>
>>>>>> I found strange classloader bug testing my plugin with M2Eclipse.
>>>>>>
>>>>>> My mojo uses plexus-utils DirectoryScanner class. Plexus-utils
>>>>>> dependency version is "3.0.17".
>>>>>> When my mojo executes I have this exception:
>>>>>>
>>>>>> Description    Resource    Path    Location    Type
>>>>>> Execution default-routes-compile of goal
>>>>>> com.google.code.play2-maven-plugin:play2-maven-plugin:1.0.
>>>>>> 0-alpha6-SNAPSHOT:routes-compile
>>>>>>
>>>>>> failed: An API incompatibility was encountered while executing
>>>>>> com.google.code.play2-maven-plugin:play2-maven-plugin:1.0.
>>>>>> 0-alpha6-SNAPSHOT:routes-compile:
>>>>>>
>>>>>> java.lang.NoSuchMethodError:
>>>>>> org.codehaus.plexus.util.DirectoryScanner.setupMatchPatterns()V
>>>>>> -----------------------------------------------------
>>>>>> realm =
>>>>>> plugin>com.google.code.play2-maven-plugin:play2-maven-
>>>>>> plugin:1.0.0-alpha6-SNAPSHOT
>>>>>>
>>>>>> strategy =
>org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
>>>>>> urls[0] =
>>>>>> file:/d:/home/gs/.m2/repository/com/google/code/
>>>>>> play2-maven-plugin/play2-maven-plugin/1.0.0-alpha6-
>>>>>> SNAPSHOT/play2-maven-plugin-1.0.0-alpha6-SNAPSHOT.jar
>>>>>>
>>>>>> urls[1] =
>>>>>> file:/d:/home/gs/.m2/repository/com/google/code/
>>>>>> play2-maven-plugin/play2-provider-api/1.0.0-alpha6-
>>>>>> SNAPSHOT/play2-provider-api-1.0.0-alpha6-SNAPSHOT.jar
>>>>>>
>>>>>> urls[2] =
>>>>>>
>file:/d:/home/gs/.m2/repository/org/apache/ant/ant/1.9.0/ant-1.9.0.jar
>>>>>> urls[3] =
>>>>>> file:/d:/home/gs/.m2/repository/org/apache/ant/ant-
>>>>>> launcher/1.9.0/ant-launcher-1.9.0.jar
>>>>>>
>>>>>> urls[4] =
>>>>>> file:/d:/home/gs/.m2/repository/com/typesafe/
>>>>>> config/1.2.0/config-1.2.0.jar
>>>>>>
>>>>>> urls[5] =
>>>>>> file:/d:/home/gs/.m2/repository/backport-util-
>>>>>> concurrent/backport-util-concurrent/3.1/backport-util-
>>>>>> concurrent-3.1.jar
>>>>>>
>>>>>> urls[6] =
>>>>>> file:/d:/home/gs/.m2/repository/org/codehaus/
>>>>>> plexus/plexus-interpolation/1.11/plexus-interpolation-1.11.jar
>>>>>>
>>>>>> urls[7] =
>>>>>> file:/d:/home/gs/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
>>>>>> urls[8] =
>>>>>> file:/d:/home/gs/.m2/repository/org/apache/maven/
>>>>>> shared/maven-common-artifact-filters/1.4/maven-common-
>>>>>> artifact-filters-1.4.jar
>>>>>>
>>>>>> urls[9] =
>>>>>> file:/d:/home/gs/.m2/repository/org/codehaus/
>>>>>> plexus/plexus-archiver/2.3/plexus-archiver-2.3.jar
>>>>>>
>>>>>> urls[10] =
>>>>>> file:/d:/home/gs/.m2/repository/org/codehaus/
>>>>>> plexus/plexus-io/2.0.6/plexus-io-2.0.6.jar
>>>>>>
>>>>>> urls[11] =
>>>>>> file:/d:/home/gs/.m2/repository/org/codehaus/
>>>>>> plexus/plexus-utils/3.0.17/plexus-utils-3.0.17.jar
>>>>>>
>>>>>> Number of foreign imports: 4
>>>>>> import: Entry[import org.sonatype.plexus.build.incremental from
>realm
>>>>>> ClassRealm[plexus.core, parent: null]]
>>>>>> import: Entry[import org.codehaus.plexus.util.Scanner from realm
>>>>>> ClassRealm[plexus.core, parent: null]]
>>>>>> import: Entry[import org.codehaus.plexus.util.AbstractScanner
>from
>>>>>> realm
>>>>>> ClassRealm[plexus.core, parent: null]]
>>>>>> import: Entry[import  from realm
>>>>>> ClassRealm[project>com.google.code.play2-maven-plugin.test-
>>>>>> projects.play22.scala:helloworld:1.0.0-alpha6-SNAPSHOT,
>>>>>>
>>>>>> parent: ClassRealm[maven.api, parent: null]]]
>>>>>>
>>>>>> -----------------------------------------------------
>>>>>>
>>>>>> (com.google.code.play2-maven-plugin:play2-maven-plugin:1.0.
>>>>>> 0-alpha6-SNAPSHOT:routes-compile:default-routes-
>>>>>> compile:generate-sources)
>>>>>> pom.xml    /helloworld-1.0.0-alpha6-SNAPSHOT    line 90    Maven
>Build
>>>>>> Problem
>>>>>>
>>>>>> I found the reason, but don't know what is the proper path to
>solve
>>>>>> this.
>>>>>> The reason is "org.codehaus.plexus.util.DirectoryScanner" class
>is
>>>>>> loaded by
>>>>>>
>>>>>> ClassRealm[plugin>com.google.code.play2-maven-plugin:play2-
>>>>>> maven-plugin:1.0.0-alpha6-SNAPSHOT,
>>>>>>
>>>>>> parent: sun.misc.Launcher$AppClassLoader@aa4c7c]
>>>>>>
>>>>>> and it's base class "org.codehaus.plexus.util.AbstractScanner" is
>>>>>> loaded by
>>>>>>
>>>>>> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@107a705[
>>>>>> org.eclipse.m2e.maven.runtime:1.4.0.20130531-2315(id=195)]
>>>>>>
>>>>>>
>>>>>> M2Eclipse bundled version is 2.0.6.
>>>>>>
>>>>>> When I call DirectoryScanner.scan(), it calls
>"setupMatchPatterns()"
>>>>>> method. This method was introduced in AbstractScanner class in
>>>>>> plexus-utils version 3.0.5
>>>>>> so it's not there in version 2.0.6.
>>>>>>
>>>>>> If I downgrade "plexus-utils" dependency version in my plugin's
>>>>>> pom.xml,
>>>>>> it works, but I don't like this solution. Is there any better? Or
>maybe
>>>>>> this problem has been
>>>>>> already solved.
>>>>>>
>>>>>> You can reproduce this problem for example by importing
>>>>>> https://play2-maven-plugin.googlecode.com/svn/trunk/test-
>>>>>> projects/play22/scala/helloworld
>>>>>>
>>>>>> example project.
>>>>>> My Maven plugin's sources are here:
>>>>>> https://play2-maven-plugin.googlecode.com/svn/trunk/
>>>>>> plugin/play2-maven-plugin
>>>>>>
>>>>>> The first mojo executed in M2Eclipse configuration build is:
>>>>>> http://play2-maven-plugin.googlecode.com/svn/trunk/
>>>>>>
>plugin/play2-maven-plugin/src/main/java/com/google/code/play2/plugin/
>>>>>> Play2RoutesCompileMojo.java
>>>>>>
>>>>>> (it uses DirectoryScanner).
>>>>>>
>>>>>> Thanks in advance.
>>>>>>
>>>>>> Grzegorz Slowikowski
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> m2e-dev mailing list
>>>>>> m2e-dev@xxxxxxxxxxx
>>>>>> https://dev.eclipse.org/mailman/listinfo/m2e-dev
>>>>>>
>>>>>>  _______________________________________________
>>>>> m2e-dev mailing list
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>>>>>
>>>>
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>>
>>
>
>
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