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Posted to issues@maven.apache.org by "Nigel Magnay (JIRA)" <ji...@codehaus.org> on 2010/04/25 13:24:12 UTC
[jira] Created: (MNG-4641) flex-mojos plugin fails with parallel
threads
flex-mojos plugin fails with parallel threads
---------------------------------------------
Key: MNG-4641
URL: http://jira.codehaus.org/browse/MNG-4641
Project: Maven 2 & 3
Issue Type: Bug
Affects Versions: 3.0-beta-1
Environment: OS X, 3.0-beta1
Reporter: Nigel Magnay
Priority: Minor
Normal build completes correctly. Multiproject build with
mvn -X -T 2.0C clean install
yields:
[ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
Caused by: org.apache.maven.plugin.MojoExecutionException
at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
... 13 more
Caused by: java.lang.NullPointerException
at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
at flex2.tools.oem.Library.recompile(Library.java:763)
at flex2.tools.oem.Library.compile(Library.java:1388)
at flex2.tools.oem.Library.build(Library.java:653)
at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
... 17 more
This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
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[jira] Commented: (MNG-4641) flex-mojos plugin fails with parallel
threads
Posted by "Marvin Froeder (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MNG-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=218902#action_218902 ]
Marvin Froeder commented on MNG-4641:
-------------------------------------
Done MNG-4642
> flex-mojos plugin fails with parallel threads
> ---------------------------------------------
>
> Key: MNG-4641
> URL: http://jira.codehaus.org/browse/MNG-4641
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-1
> Environment: OS X, 3.0-beta1
> Reporter: Nigel Magnay
> Assignee: Benjamin Bentmann
> Priority: Minor
>
> Normal build completes correctly. Multiproject build with
> mvn -X -T 2.0C clean install
> yields:
> [ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Caused by: org.apache.maven.plugin.MojoExecutionException
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
> at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
> at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
> at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
> at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
> at flex2.tools.oem.Library.recompile(Library.java:763)
> at flex2.tools.oem.Library.compile(Library.java:1388)
> at flex2.tools.oem.Library.build(Library.java:653)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
> ... 17 more
> This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
--
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[jira] Reopened: (MNG-4641) flex-mojos plugin fails with parallel
threads
Posted by "Nigel Magnay (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MNG-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nigel Magnay reopened MNG-4641:
-------------------------------
Sorry, I don't think that's a good enough response.
Clearly the plugin works perfectly in 2.x, and in 3.x. Therefore turning on some option in M3 introduces a regression. That's a bug, or an API incompatibility that should be being detected or dealt with. I can also see this regressions for other plugins, and in plugin generation (I have a groovy+java+modello plugin that fails as well, because it's clearly got the compilation dependency order totally wrong).
If it's a half-baked feature, it should have text at the end of the build failure to say 'Build failed, might be because you're using old plugins that don't support a new API'. "At your risk only". But it seems that this feature is assuming that concurrency is, by default, possible for all plugins, which seems to me a fairly tenuous assertion.
The *very first* thing that a plugin developer is going to say is 'huh? what do I have to do here to support this? Do I just wrap the whole plugin in a critical section? or what?'. I can't find anything in any documentation anywhere that describes any new API (if there is one), or any compatibility changes that plugin authors should be conforming to. Nothing in README.txt, nothing in the release notes. And if the build fails in this mode, it ought to spit out a URL to this documentation (m3 has made such great strides here in other places in explaining what's probably gone wrong).
But this mode also either shouldn't be attempting to run concurrent plugins that aren't known to work correctly in parallel - so either an API ought to exist to declare this attribute, or a configuration point somewhere to explicitly enable or disable it.
> flex-mojos plugin fails with parallel threads
> ---------------------------------------------
>
> Key: MNG-4641
> URL: http://jira.codehaus.org/browse/MNG-4641
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-1
> Environment: OS X, 3.0-beta1
> Reporter: Nigel Magnay
> Assignee: Benjamin Bentmann
> Priority: Minor
>
> Normal build completes correctly. Multiproject build with
> mvn -X -T 2.0C clean install
> yields:
> [ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Caused by: org.apache.maven.plugin.MojoExecutionException
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
> at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
> at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
> at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
> at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
> at flex2.tools.oem.Library.recompile(Library.java:763)
> at flex2.tools.oem.Library.compile(Library.java:1388)
> at flex2.tools.oem.Library.build(Library.java:653)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
> ... 17 more
> This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
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[jira] Closed: (MNG-4641) flex-mojos plugin fails with parallel
threads
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MNG-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kristian Rosenvold closed MNG-4641.
-----------------------------------
Resolution: Won't Fix
Every effort has been taken to stay backward compatible in M3. This does not mean any *new* fature automatically will work with all current old builds. This is 3.0, not 2.2.2, and for 3.0 with parallel, the rules have changed somewhat - if not much. The feature has been a community effort and discussed for almost 9 months , and there is nothing half-baked about it - it's been running a heavy test suite for a long time. We will look into how we communicate consequences of parallel builds, it has been decided long ago that this feature will be marked "experimental" for 3.0, we might add some more dire-looking warnings or other means. This is exactly because we have known all along that some mojos would have problems.
Updates to the mojo-guidelines are forthcoming, and will contain mostly the basic thread-safety issues; be careful with static state, look out for unintended singletons. If your underlying technology simply doesn't support concurrent invocations, I'd suggest just putting synchronized on the execute statement of the mojo.
We discussed adding some means for a mojo to say "I am threadsafe" a few months ago, and at that time it didn't seem necessary. As a direct consequence of this issue I am reopening that discussion om the dev-list. I am closing this issue, but we will take another round at discussing the need for a flag. Feel free to create the more appropriate "Mojos need some way to indicate support of multithreading" issue if you think this is necessary.
Oh; and yes: The modello plugin has one of the worst concurrency problems seen so far. 1.4-SNAPSHOT in trunk solves the problem. Please report other plugin related issues to the appropriate issue trackers.
> flex-mojos plugin fails with parallel threads
> ---------------------------------------------
>
> Key: MNG-4641
> URL: http://jira.codehaus.org/browse/MNG-4641
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-1
> Environment: OS X, 3.0-beta1
> Reporter: Nigel Magnay
> Assignee: Benjamin Bentmann
> Priority: Minor
>
> Normal build completes correctly. Multiproject build with
> mvn -X -T 2.0C clean install
> yields:
> [ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Caused by: org.apache.maven.plugin.MojoExecutionException
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
> at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
> at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
> at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
> at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
> at flex2.tools.oem.Library.recompile(Library.java:763)
> at flex2.tools.oem.Library.compile(Library.java:1388)
> at flex2.tools.oem.Library.build(Library.java:653)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
> ... 17 more
> This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
--
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[jira] Commented: (MNG-4641) flex-mojos plugin fails with parallel
threads
Posted by "Marvin Froeder (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MNG-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=218887#action_218887 ]
Marvin Froeder commented on MNG-4641:
-------------------------------------
Hi Ben,
Not sure if there is anything I can do to fix that, most likely the flex compiler doesn't allow me to do that, since, as Nigel pointed out, Flexmojos works fine with maven 2/3...
Is there anything I can do to tell maven to not run flexmojos in multiple threads?
VELO
> flex-mojos plugin fails with parallel threads
> ---------------------------------------------
>
> Key: MNG-4641
> URL: http://jira.codehaus.org/browse/MNG-4641
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-1
> Environment: OS X, 3.0-beta1
> Reporter: Nigel Magnay
> Assignee: Benjamin Bentmann
> Priority: Minor
>
> Normal build completes correctly. Multiproject build with
> mvn -X -T 2.0C clean install
> yields:
> [ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Caused by: org.apache.maven.plugin.MojoExecutionException
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
> at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
> at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
> at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
> at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
> at flex2.tools.oem.Library.recompile(Library.java:763)
> at flex2.tools.oem.Library.compile(Library.java:1388)
> at flex2.tools.oem.Library.build(Library.java:653)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
> ... 17 more
> This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
--
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[jira] Closed: (MNG-4641) flex-mojos plugin fails with parallel
threads
Posted by "Benjamin Bentmann (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MNG-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Benjamin Bentmann closed MNG-4641.
----------------------------------
Resolution: Not A Bug
Assignee: Benjamin Bentmann
Please report this to the author of the plugin.
> flex-mojos plugin fails with parallel threads
> ---------------------------------------------
>
> Key: MNG-4641
> URL: http://jira.codehaus.org/browse/MNG-4641
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-1
> Environment: OS X, 3.0-beta1
> Reporter: Nigel Magnay
> Assignee: Benjamin Bentmann
> Priority: Minor
>
> Normal build completes correctly. Multiproject build with
> mvn -X -T 2.0C clean install
> yields:
> [ERROR] Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null: MojoExecutionException: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.sonatype.flexmojos:flexmojos-maven-plugin:3.6:compile-swc (default-compile-swc) on project realtime-flex-model: null
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:141)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:77)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:69)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:82)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:165)
> at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:162)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
> Caused by: org.apache.maven.plugin.MojoExecutionException
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2491)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.run(AbstractFlexCompilerMojo.java:1282)
> at org.sonatype.flexmojos.AbstractIrvinMojo.execute(AbstractIrvinMojo.java:183)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:133)
> ... 13 more
> Caused by: java.lang.NullPointerException
> at macromedia.asc.embedding.LintEvaluator.getWarningDefaults(LintEvaluator.java:3221)
> at flex2.compiler.as3.As3Compiler.processCoachSettings(As3Compiler.java:1270)
> at flex2.compiler.as3.As3Compiler.<init>(As3Compiler.java:202)
> at flex2.tools.WebTierAPI.getCompilers(WebTierAPI.java:257)
> at flex2.tools.oem.Library.recompile(Library.java:763)
> at flex2.tools.oem.Library.compile(Library.java:1388)
> at flex2.tools.oem.Library.build(Library.java:653)
> at org.sonatype.flexmojos.compiler.AbstractFlexCompilerMojo.build(AbstractFlexCompilerMojo.java:2473)
> ... 17 more
> This could be because 2 flex compiles are trying to run concurrently, and perhaps that isn't allowed..
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