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java.lang.NullPointerException: 	at org.glassfish.appclient.server.core.AppClientDeployer.clean(AppClientDeployer.java:265)	at org.glassfish.internal.data.EngineInfo.clean(EngineInfo.java:114)	at org.glassfish.internal.data.EngineRef.clean(EngineRef.java:171)	at com.sun.enterprise.v3.server.ApplicationLifecycle$1.actOn(ApplicationLifecycle.java:224)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:342)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183)	at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)	at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365)	at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204)	at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166)	at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)	at com.sun.grizzly.ContextTask.run(ContextTask.java:69)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)	at java.lang.Thread.run(Thread.java:619)