Thanks for the reply, Tim. I am executing "mvn install", not "mvn deploy".
Also, I tried using scpext, but got following error: [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error deploying artifact: Unsupported Protocol: 'scpext': Cannot find wagon which supports the requested protocol: scpext Component descriptor cannot be found in the component repository: org.apache.maven.wagon.Wagonscpext. Regards, Mukta Jindal -----Original Message----- From: Tim Kettler [mailto:[EMAIL PROTECTED] Sent: 04 June 2008 12:16 To: Maven Users List Subject: Re: Need help | Getting NPE while using "mvn install" JINDAL, Mukta, IDC schrieb: > Hi All, Hi, > > I am getting following error while using "mvn install" though "mvn package" > is working fine. Judging from the stacktrace below you ran 'mvn deploy', not 'mvn install' (see the reference to the deploy mojo). As the deploy phase is executed after the install phase, install seems to work just fine. > I did entire cleanup, restarted machine too. > > What could be the possible reasons ? > The deploy tries to upload your artifact via SCP (JCrafts JSCH is the SSH library used by maven) to the remote repository you have configured in the <distributionManagement/> section of your POM and fails doing this. You have to investigate why exactly it is failing for you. I would start trying to test if uploading something manually via commandline scp does work and then double check the maven ssh configuration. Another option is to try to switch from scp: to scpext: protocol in <distributionManagemnt>, so maven don't uses JSCH but the commandline scp application. > > > [INFO] > ---------------------------------------------------------------------- > -- > [ERROR] FATAL ERROR > [INFO] > ---------------------------------------------------------------------- > -- > [INFO] null > [INFO] > ---------------------------------------------------------------------- > -- > [INFO] Trace > java.lang.NullPointerException > at com.jcraft.jsch.Session.disconnect(Unknown Source) > at > org.apache.maven.wagon.providers.ssh.jsch.AbstractJschWagon.closeConnection(AbstractJschWagon.java:207) > at > org.apache.maven.wagon.AbstractWagon.disconnect(AbstractWagon.java:153) > at > org.apache.maven.artifact.manager.DefaultWagonManager.disconnectWagon(DefaultWagonManager.java:675) > at > org.apache.maven.artifact.manager.DefaultWagonManager.getRemoteFile(DefaultWagonManager.java:551) > at > org.apache.maven.artifact.manager.DefaultWagonManager.getArtifactMetadata(DefaultWagonManager.java:363) > at > org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.resolveAlways(DefaultRepositoryMetadataManager.java:364) > at > org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.resolveAlways(DefaultRepositoryMetadataManager.java:318) > at > org.apache.maven.artifact.transform.SnapshotTransformation.resolveLatestSnapshotBuildNumber(SnapshotTransformation.java:161) > at > org.apache.maven.artifact.transform.SnapshotTransformation.transformForDeployment(SnapshotTransformation.java:100) > at > org.apache.maven.artifact.transform.DefaultArtifactTransformationManager.transformForDeployment(DefaultArtifactTransformationManager.java:78) > at > org.apache.maven.artifact.deployer.DefaultArtifactDeployer.deploy(DefaultArtifactDeployer.java:71) > at > org.apache.maven.plugin.deploy.DeployMojo.execute(DeployMojo.java:162) > at > org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:447) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143) > at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333) > at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126) > at org.apache.maven.cli.MavenCli.main(MavenCli.java:282) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:585) > at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) > at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) > at > org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) > > at org.codehaus.classworlds.Launcher.main(Launcher.java:375) > > Thanks, > Mukta Jindal. > -Tim > ********************************************************************** > ************* The Royal Bank of Scotland plc. 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