Develop Reference

appcelerator dexer fails with Uncaught translation error when using module

Using Appcelerator with Titanium SDK 6.2.2.GA (the same happens with any 6.x SDK).
I create a new project module, compile it (for 6.2.2) and install it in the SDK (6.2.2).
Then I create a new Mobile App project (Clasic, Single Window, No Cloud) and add the previously created module to it.
I compile to run and the result is :
[ERROR] : Failed to run dexer:
[ERROR] :
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$anim;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$animator;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$attr;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$bool;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$color;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$dimen;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$drawable;
[ERROR] : Uncaught translation error: java.lang.IllegalArgumentException: already added: Landroid/support/compat/R$id;
[ERROR] :
[ERROR] : UNEXPECTED TOP-LEVEL EXCEPTION:
[ERROR] : java.lang.RuntimeException: Translation has been interrupted
[ERROR] : at com.android.dx.command.dexer.Main.processAllFiles(Main.java:608)
[ERROR] : at com.android.dx.command.dexer.Main.runMultiDex(Main.java:366)
[ERROR] : at com.android.dx.command.dexer.Main.run(Main.java:275)
[ERROR] : at com.android.dx.command.dexer.Main.main(Main.java:245)
[ERROR] : at com.android.dx.command.Main.main(Main.java:106)
[ERROR] : Caused by: java.lang.InterruptedException: Too many errors
[ERROR] : at com.android.dx.command.dexer.Main.processAllFiles(Main.java:600)
[ERROR] : ... 4 more
I have tried :
Other Java versions
Other android build tools versions
When doing the same with SDK 5.x.x.GA it works fine. The problem started when I installed Axway Appcelerator Studio, build: 4.10.0.201709271713 and attempted to compile my project with Titanium SDK 6.2.2.GA. (Before I was using 5.x.x).
Any ideas welcome.

Version 6.2.2.GA requires you to use Android SDK 26 and build tools 26. Before 6.2 you needed build tools 23.
You can force a version in the tiapp.xml file in the android manifest section
<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="23"/>
As always, check the Compatibilty matrix of Titanium

After uninstalling Appcelerator Studio, reinstalling and setting the path for NDK to use android-ndk-r11c and also installing GNU gperf the problem is fixed.

Auth0 gradle dependency error

I am trying to work with Auth0 in my project and when I try to include it in the build.gradle file I get an error. I've tried adding the following:
compile 'com.auth0.android:auth0:1.10.0'
and
compile 'com.auth0.android:auth0:1.+'
I get the following error:
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed with multiple errors, see logs
I ran gradlew build --stacktrace and got this:
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task ':app:processDebugManifest'.
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > Manifest merger failed with multiple errors, see logs
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Try:
14:31:51.285 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.
14:31:51.285 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger]
14:31:51.286 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED
14:31:51.286 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger]
14:31:51.286 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] Total time: 3.378 secs
What am I doing wrong?
Update
Opened AndroidManifest.xml and found this message in the Merged Manifest
Merging Errors: Error: Attribute data#host at AndroidManifest.xml requires a placeholder substitution but no value for <auth0Domain> is provided. app main manifest (this file) Error: Attribute data#scheme at AndroidManifest.xml requires a placeholder substitution but no value for <auth0Scheme> is provided. app main manifest (this file)

Answering my own question here:
The merged manifest had the error
Attribute data#host at AndroidManifest.xml requires a placeholder substitution but no value for <auth0Domain> is provided. app main manifest (this file) Error: Attribute data#scheme at AndroidManifest.xml requires a placeholder substitution but no value for <auth0Scheme> is provided. app main manifest (this file)
Basically saying that auth0Domain and auth0Scheme needed values declared.
I needed to enter the line
manifestPlaceholders = [auth0Domain: "#string/com_auth0_domain", auth0Scheme: "demo"]
in the build.gradle file and then it compile just fine.
Basically follow through instructions before deciding that you're stuck, those instructions were here.

readlink('/proc/self/fd/21') failed: Permission denied [fd=21] error in Android 6 after adding Admob module to Appcelerator app

im creating app in appcelerator studio. It worked without errors on my Android 6 Lenovo a7000, until I added admob module to it. Now Im getting these errors:
[ERROR] : linker: readlink('/proc/self/fd/21') failed: Permission denied [fd=21]
[ERROR] : linker: warning: unable to get realpath for the library "/data/app/com.techintegrity.ekko-1/lib/arm/libti.admob.so". Will use given name.
[ERROR] : TiApplication: (KrollRuntimeThread) [77,153] Sending event: exception on thread: KrollRuntimeThread msg:java.lang.UnsatisfiedLinkError: dlopen failed: /data/app/com.techintegrity.ekko-1/lib/arm/libti.admob.so: has text relocations; Titanium 5.2.0,2016/02/20 08:05,384775e
[ERROR] : TiApplication: java.lang.UnsatisfiedLinkError: dlopen failed: /data/app/com.techintegrity.ekko-1/lib/arm/libti.admob.so: has text relocations
[ERROR] : TiApplication: at java.lang.Runtime.loadLibrary(Runtime.java:372)
[ERROR] : TiApplication: at java.lang.System.loadLibrary(System.java:1076)
[ERROR] : TiApplication: at org.appcelerator.kroll.runtime.v8.V8Runtime.loadExternalModules(V8Runtime.java:132)
[ERROR] : TiApplication: at org.appcelerator.kroll.runtime.v8.V8Runtime.initRuntime(V8Runtime.java:99)
[ERROR] : TiApplication: at org.appcelerator.kroll.KrollRuntime.doInit(KrollRuntime.java:205)
[ERROR] : TiApplication: at org.appcelerator.kroll.KrollRuntime$KrollRuntimeThread.run(KrollRuntime.java:114)
I have updated everything: appcelerator studio, titanium sdk, node.js, but the problem is still the same. found few people with similar error, but nothing that worked for them seems working for me. Thanks for any help

Add following code to your config.xml.
<property name="run-on-main-thread" type="bool">true</property>
This will solve the problem

Getting error during dex with a project using javafx and apache POI

I'm trying to use Apache POI on Android in order to do that i created a gradle project on eclipse but when i execute the gradle task androidInstall i get an error during the dex step. (run task is working)
Here the error:
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/EventFilter;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/FactoryConfigurationError;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/FactoryFinder;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/FactoryFinder$1;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/FactoryFinder$ClassLoaderFinder;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/FactoryFinder$ClassLoaderFinderConcrete;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/Location;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/StreamFilter;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Ljavax/xml/stream/XMLEventFactory;
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.RuntimeException: Translation has been interrupted
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:613)
at com.android.dx.command.dexer.Main.runMultiDex(Main.java:366)
at com.android.dx.command.dexer.Main.run(Main.java:275)
at com.android.dx.command.dexer.Main.main(Main.java:245)
at com.android.dx.command.Main.main(Main.java:106)
Caused by: java.lang.InterruptedException: Too many errors
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:605)
... 4 more
16:41:25.082 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:java] Java Result: 2
16:41:25.083 [DEBUG] [org.gradle.api.internal.project.ant.AntLoggingAdapter] Setting project property: dexResult -> 2
16:41:25.084 [DEBUG] [org.gradle.api.Project] Dex result value = 2
16:41:25.093 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':dex'
16:41:25.094 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :dex FAILED
16:41:25.095 [INFO] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] :dex (Thread[Daemon worker Thread 2,5,main]) completed. Took 2 mins 19.455 secs.
16:41:25.095 [DEBUG] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] Task worker [Thread[Daemon worker Thread 2,5,main]] finished, busy: 21 mins 29.722 secs, idle: 0.053 secs
16:41:25.103 [ERROR] [org.gradle.BuildExceptionReporter]
16:41:25.108 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
16:41:25.109 [ERROR] [org.gradle.BuildExceptionReporter]
16:41:25.109 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
16:41:25.109 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':dex'.
16:41:25.110 [ERROR] [org.gradle.BuildExceptionReporter] > warning: Ignoring InnerClasses attribute for an anonymous inner class
16:41:25.110 [ERROR] [org.gradle.BuildExceptionReporter] (org.apache.xmlbeans.XmlBeans$1) that doesn't come with an
16:41:25.111 [ERROR] [org.gradle.BuildExceptionReporter] associated EnclosingMethod attribute. This class was probably produced by a
16:41:25.111 [ERROR] [org.gradle.BuildExceptionReporter] compiler that did not target the modern .class file format. The recommended
16:41:25.112 [ERROR] [org.gradle.BuildExceptionReporter] solution is to recompile the class from source, using an up-to-date compiler
16:41:25.112 [ERROR] [org.gradle.BuildExceptionReporter] and without specifying any "-target" type options. The consequence of ignoring
16:41:25.112 [ERROR] [org.gradle.BuildExceptionReporter] this warning is that reflective operations on this class will incorrectly
16:41:25.115 [ERROR] [org.gradle.BuildExceptionReporter] indicate that it is *not* an inner class.
16:41:25.115 [ERROR] [org.gradle.BuildExceptionReporter] warning: Ignoring InnerClasses attribute for an anonymous inner class
16:41:25.116 [ERROR] [org.gradle.BuildExceptionReporter] (org.apache.xmlbeans.XmlSimpleList$1) that doesn't come with an
16:41:25.140 [ERROR] [org.gradle.BuildExceptionReporter] associated EnclosingMethod attribute. This class was probably produced by a
16:41:25.140 [ERROR] [org.gradle.BuildExceptionReporter] compiler that did not target the modern .class file format. The recommended
16:41:25.140 [ERROR] [org.gradle.BuildExceptionReporter] solution is to recompile the class from source, using an up-to-date compiler
16:41:25.141 [ERROR] [org.gradle.BuildExceptionReporter] and without specifying any "-target" type options. The consequence of ignoring
16:41:25.141 [ERROR] [org.gradle.BuildExceptionReporter] this warning is that reflective operations on this class will incorrectly
16:41:25.141 [ERROR] [org.gradle.BuildExceptionReporter] indicate that it is *not* an inner class.
16:41:25.141 [ERROR] [org.gradle.BuildExceptionReporter] warning: Ignoring InnerClasses attribute for an anonymous inner class
16:41:25.142 [ERROR] [org.gradle.BuildExceptionReporter] (org.apache.xmlbeans.XmlSimpleList$2) that doesn't come with an
16:41:25.142 [ERROR] [org.gradle.BuildExceptionReporter] associated EnclosingMethod attribute. This class was probably produced by a
16:41:25.142 [ERROR] [org.gradle.BuildExceptionReporter] compiler that did not target the modern .class file format. The recommended
16:41:25.142 [ERROR] [org.gradle.BuildExceptionReporter] solution is to recompile the class from source, using an up-to-date compiler
16:41:25.143 [ERROR] [org.gradle.BuildExceptionReporter] and without specifying any "-target" type options. The consequence of ignoring
16:41:25.143 [ERROR] [org.gradle.BuildExceptionReporter] this warning is that reflective operations on this class will incorrectly
16:41:25.143 [ERROR] [org.gradle.BuildExceptionReporter] indicate that it is *not* an inner class.
...
I read that i needed to add this to ignore warning but i get another error on compileSdkVersion
lintOptions {
abortOnError false
}
and here is my build.gradle file:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.javafxports:jfxmobile-plugin:1.0.0-b8'
}
}
apply plugin: 'org.javafxports.jfxmobile'
mainClassName = "JavaFXStage"
version = '1.0'
repositories {
jcenter()
}
jfxmobile {
ios {
forceLinkClasses = ['ensemble.**.*']
}
android {
javafxportsVersion = '8u40-b5'
compileSdkVersion = 23
applicationPackage = 'any.package.name'
}
}
dependencies{
def poiVersion = "3.10.1"
compile "org.apache.poi:poi:${poiVersion}"
compile "org.apache.poi:poi-ooxml:${poiVersion}"
compile "org.apache.poi:ooxml-schemas:1.1"
compile "org.apache.xmlbeans:xmlbeans:2.6.0"
}
If you need more information about the project don't hesitate to ask.
If you have any tips to solve my problem thanks.
Thomas

Using Apache POI on Android does not work out of the box due to a number of limitations. Among one of them is the fact that the xmlbeans jar contains some classes multiple times, which confuses the Android compiler. There are also issues about code from pacakge javax and the size of the code.
There are currently two projects which try to solve this:
https://github.com/centic9/poi-on-android/ (maintained by me)
https://github.com/andruhon/android5xlsx
Both try to solve this by re-packaging the classes into a more compact jar file which can then be added to an Android application. Android5xlsx is based on POI 3.12 currently, poi-on-android on 3.15-beta1 and can be re-built against recent versions of POI fairly easily.

I solved the error in the Dex step by excluding xmlbeans in the gradle.build:
compile 'org.apache.poi:poi:3.16'
compile ('org.apache.poi:poi-ooxml:3.16') {
exclude group: 'org.apache.xmlbeans', module: 'xmlbeans'
}
In my java code I didn't use xmlbeans but other parsers. Here's my import list:
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

Error in Android bootstrap?

Hello every one I am working on android boot strap for that I follow this link and I configure Maven on my linux machine. I also use Intellij for Android but I have some error.
error which I am getting when I try Maven command in my Android bootstrap project :
[INFO] --- maven-clean-plugin:2.3:clean (default-clean) # com-example-demo-parent ---
[WARNING] The POM for org.apache.maven.plugins:maven-clean-plugin:jar:2.3 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
Sep 07, 2013 4:33:51 PM org.sonatype.guice.bean.reflect.Logs$JULSink warn
WARNING: Error injecting: org.apache.maven.plugin.clean.CleanMojo
java.lang.NoClassDefFoundError: org/apache/maven/shared/model/fileset/FileSet
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2413)
at java.lang.Class.getDeclaredConstructors(Class.java:1855)
at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245)
at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:98)
at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:629)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:831)
at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:758)
at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:255)
at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:204)
at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:954)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:987)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:950)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000)
at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52)
at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108)
at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1011)
at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961)
at com.google.inject.Scopes$1$1.get(Scopes.java:59)
at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83)
at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:92)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
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:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.ClassNotFoundException: org.apache.maven.shared.model.fileset.FileSet
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
... 54 more
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] demo parent ....................................... FAILURE [0.248s]
[INFO] demo app .......................................... SKIPPED
[INFO] Android-Bootstrap integration tests ............... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.483s
[INFO] Finished at: Sat Sep 07 16:33:52 IST 2013
[INFO] Final Memory: 7M/86M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.3:clean (default-clean) on project com-example-demo-parent: Execution default-clean of goal org.apache.maven.plugins:maven-clean-plugin:2.3:clean failed: A required class was missing while executing org.apache.maven.plugins:maven-clean-plugin:2.3:clean: org/apache/maven/shared/model/fileset/FileSet
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.apache.maven.plugins:maven-clean-plugin:2.3
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/trainee02/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/2.3/maven-clean-plugin-2.3.jar
[ERROR] urls[1] = file:/home/trainee02/.m2/repository/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[maven.api, parent: null]]
[ERROR]
[ERROR] -----------------------------------------------------: org.apache.maven.shared.model.fileset.FileSet
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
error in my intellij project
please help . Thanx in advance .

well i find my answer after find lots of thing on he google is that . i change following settings:
my environment setting
export M2_HOME=/home/wideand04/mavehome/apache-maven-3.0.4
export PATH=/home/wideand04/mavehome/apache-maven-3.0.4/bin:${PATH}
and i use mave 3.0.4 binary and i get my solution thanks shiju B your link help me a lot

I had a similar problem when doing maven clean.
it was using maven-clean-plugin version 2.2 by default.
i forced version 2.5 by adding the following to my build and that solved the problem:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>2.5</version>
</plugin>