NPEs

@turbomanage reported these.

Investigate npe exceptions and get rid of these errors

```
!SESSION 2015-04-21 11:49:22.686 -----------------------------------------------
eclipse.buildId=4.4.2.M20150204-1700
java.version=1.8.0_45
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product

!ENTRY org.eclipse.equinox.p2.transport.ecf 2 0 2015-04-21 12:00:52.181
!MESSAGE Connection to http://mirror.cc.vt.edu/pub/eclipse/releases/luna/201406250900/plugins/org.eclipse.datatools.sqltools.sql_1.0.1.v201110050515.jar.pack.gz failed on Network is unreachable. Retry attempt 0 started
!STACK 0
java.net.ConnectException: Network is unreachable
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.eclipse.ecf.internal.provider.filetransfer.httpclient4.ECFHttpClientProtocolSocketFactory.connectSocket(ECFHttpClientProtocolSocketFactory.java:84)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1077)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:1068)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:1064)
at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:73)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY org.eclipse.equinox.p2.transport.ecf 2 0 2015-04-21 12:01:00.193
!MESSAGE Connection to http://mirror.cc.vt.edu/pub/eclipse/releases/luna/201406250900/plugins/org.eclipse.jst.j2ee.ejb_1.1.800.v201404021630.jar.pack.gz failed on Network is unreachable. Retry attempt 0 started
!STACK 0
java.net.ConnectException: Network is unreachable
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.eclipse.ecf.internal.provider.filetransfer.httpclient4.ECFHttpClientProtocolSocketFactory.connectSocket(ECFHttpClientProtocolSocketFactory.java:84)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1077)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:1068)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:1064)
at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:73)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY org.eclipse.equinox.p2.transport.ecf 2 0 2015-04-21 12:01:00.711
!MESSAGE Connection to http://mirror.cc.vt.edu/pub/eclipse/releases/luna/201406250900/plugins/org.eclipse.jst.j2ee.ejb_1.1.800.v201404021630.jar.pack.gz failed on Network is unreachable. Retry attempt 0 started
!STACK 0
java.net.ConnectException: Network is unreachable
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.eclipse.ecf.internal.provider.filetransfer.httpclient4.ECFHttpClientProtocolSocketFactory.connectSocket(ECFHttpClientProtocolSocketFactory.java:84)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1077)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:1068)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:1064)
at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:73)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!SESSION 2015-04-21 16:19:16.316 -----------------------------------------------
eclipse.buildId=4.4.2.M20150204-1700
java.version=1.8.0_45
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-04-21 16:30:06.026
!MESSAGE Category com.google.gwt.facet has not been defined. It is used in plugin com.google.gwt.eclipse.wtp.

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:30:12.024
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-04-21 16:30:20.969
!MESSAGE Preset com.google.gwt.facet.preset.gwtonly in plugin com.google.gwt.eclipse.wtp uses unknown version "1.6,1.7,1.8" of facet "jst.java".

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-04-21 16:30:21.229
!MESSAGE Project facet wst.jsdt.web has not been defined. It is used in plugin org.eclipse.jst.server.core.

!ENTRY org.eclipse.wst.common.emf 4 0 2015-04-21 16:32:26.573
!MESSAGE
!STACK 0
java.lang.NullPointerException
at org.eclipse.wst.xml.core.internal.document.XMLModelUpdater.replaceSource(XMLModelUpdater.java:1627)
at org.eclipse.wst.xml.core.internal.document.XMLModelUpdater.replaceChild(XMLModelUpdater.java:1585)
at org.eclipse.wst.xml.core.internal.document.DOMModelImpl.childReplaced(DOMModelImpl.java:192)
at org.eclipse.wst.xml.core.internal.document.NodeContainer.notifyChildReplaced(NodeContainer.java:361)
at org.eclipse.wst.xml.core.internal.document.NodeContainer.insertBefore(NodeContainer.java:302)
at org.eclipse.wst.xml.core.internal.document.ElementImpl.insertBefore(ElementImpl.java:755)
at org.eclipse.wst.common.internal.emf.utilities.DOMUtilities.insertBeforeNode(DOMUtilities.java:356)
at org.eclipse.wst.common.internal.emf.utilities.DOMUtilities.insertBeforeNodeAndWhitespace(DOMUtilities.java:381)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.primUpdateDOMMultiFeature(EMF2DOMAdapterImpl.java:405)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.primUpdateDOMMultiFeature(EMF2DOMAdapterImpl.java:1416)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.updateDOMMultiFeature(EMF2DOMAdapterImpl.java:1678)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.updateDOMFeature(EMF2DOMAdapterImpl.java:1617)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.primUpdateDOM(EMF2DOMAdapterImpl.java:982)
at org.eclipse.wst.xml.core.internal.emf2xml.EMF2DOMSSEAdapter.updateDOM(EMF2DOMSSEAdapter.java:477)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.primUpdateDOMMultiFeature(EMF2DOMAdapterImpl.java:414)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.updateDOMRootFeature(EMF2DOMAdapterImpl.java:1002)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapterImpl.primUpdateDOM(EMF2DOMAdapterImpl.java:978)
at org.eclipse.wst.xml.core.internal.emf2xml.EMF2DOMSSEAdapter.updateDOM(EMF2DOMSSEAdapter.java:477)
at org.eclipse.wst.common.internal.emf.resource.EMF2DOMRenderer.createDOMTree(EMF2DOMRenderer.java:129)
at org.eclipse.wst.xml.core.internal.emf2xml.EMF2DOMSSERenderer.createDOMTreeIfNecessary(EMF2DOMSSERenderer.java:194)
at org.eclipse.wst.xml.core.internal.emf2xml.EMF2DOMSSERenderer.doSave(EMF2DOMSSERenderer.java:251)
at org.eclipse.wst.common.internal.emf.resource.TranslatorResourceImpl.doSave(TranslatorResourceImpl.java:190)
at org.eclipse.wst.common.internal.emf.resource.TranslatorResourceImpl.save(TranslatorResourceImpl.java:170)
at org.eclipse.wst.common.internal.emf.resource.ReferencedXMIResourceImpl.saveIfNecessary(ReferencedXMIResourceImpl.java:287)
at org.eclipse.jpt.common.core.internal.resource.xml.AbstractJptXmlResourceProvider.createFileAndResource_(AbstractJptXmlResourceProvider.java:193)
at org.eclipse.jpt.common.core.internal.resource.xml.AbstractJptXmlResourceProvider$CreateFileAndResourceWorkspaceRunnable.run(AbstractJptXmlResourceProvider.java:181)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.jpt.common.core.internal.resource.xml.AbstractJptXmlResourceProvider.createFileAndResource(AbstractJptXmlResourceProvider.java:163)
at org.eclipse.jpt.common.core.internal.operations.AbstractJptFileCreationOperation.createFile(AbstractJptFileCreationOperation.java:94)
at org.eclipse.jpt.common.core.internal.operations.AbstractJptFileCreationOperation.execute(AbstractJptFileCreationOperation.java:48)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl$1.run(DataModelPausibleOperationImpl.java:385)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:410)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:360)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.doExecute(DataModelPausibleOperationImpl.java:247)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.executeImpl(DataModelPausibleOperationImpl.java:219)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.cacheThreadAndContinue(DataModelPausibleOperationImpl.java:89)
at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.execute(DataModelPausibleOperationImpl.java:207)
at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.createPersistenceXml(JpaFacetInstallDelegate.java:111)
at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.createProjectXml(JpaFacetInstallDelegate.java:100)
at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetInstallDelegate.execute_(JpaFacetInstallDelegate.java:61)
at org.eclipse.jpt.jpa.core.internal.facet.JpaFacetActionDelegate.execute(JpaFacetActionDelegate.java:35)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.callDelegate(FacetedProject.java:1477)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.modifyInternal(FacetedProject.java:441)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChangesInternal(FacetedProject.java:1181)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.access$2(FacetedProject.java:1117)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject$5.run(FacetedProject.java:1099)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChanges(FacetedProject.java:1109)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectWorkingCopy.commitChanges(FacetedProjectWorkingCopy.java:2020)
at com.google.appengine.eclipse.wtp.maven.JpaFacetManager.ensureLatestJpaFacetVersionInstalled(JpaFacetManager.java:93)
at com.google.appengine.eclipse.wtp.maven.JpaFacetManager.configureJpaFacet(JpaFacetManager.java:52)
at com.google.appengine.eclipse.wtp.maven.GaeProjectConfigurator.configure(GaeProjectConfigurator.java:47)
at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:120)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:477)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$3.call(ProjectConfigurationManager.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:166)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:142)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:470)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.configureNewMavenProjects(ProjectConfigurationManager.java:250)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:163)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager$1.call(ProjectConfigurationManager.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:166)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:142)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:96)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1348)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.importProjects(ProjectConfigurationManager.java:133)
at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob$1.doCreateMavenProjects(ImportMavenProjectsJob.java:73)
at org.eclipse.m2e.core.ui.internal.wizards.AbstractCreateMavenProjectsOperation.run(AbstractCreateMavenProjectsOperation.java:62)
at org.eclipse.m2e.core.ui.internal.wizards.ImportMavenProjectsJob.runInWorkspace(ImportMavenProjectsJob.java:82)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY com.google.gwt.eclipse.wtp 4 1 2015-04-21 16:32:26.998
!MESSAGE Google GWT: GwtFacetInstallSdkDelegate: Maven detected, skipping standard GWT classpath container.

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:33:22.398
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:33:30.211
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:34:03.658
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.core 4 0 2015-04-21 16:34:06.849
!MESSAGE Datanucleus enhancer terminated with exit code 1.
Navigate to the console view for "Datanucleus Enhancer" for more information

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:35:19.584
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:36:02.911
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:36:52.878
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:36:56.059
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:39:48.152
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-04-21 16:39:53.702
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY org.eclipse.ui.navigator 2 0 2015-04-21 16:44:19.156
!MESSAGE Can't find Navigator Content Descriptor with id: org.eclipse.jst.servlet.ui.EnhancedJavaRendering

!ENTRY com.google.gwt.eclipse.wtp 4 1 2015-04-21 16:46:23.169
!MESSAGE Google GWT: setLauncherIdToWtpRunTimeLaunchConfig: Adding server launcherId id=20c144c0-f321-4bc0-aa3b-537f24acb452

!ENTRY com.google.gwt.eclipse.wtp 4 1 2015-04-21 16:46:23.207
!MESSAGE Google GWT: posiblyLaunchGwtSuperDevModeCodeServer: Launching GWT Super Dev Mode CodeServer.

!ENTRY org.eclipse.jdt.launching 4 101 2015-04-21 16:46:25.463
!MESSAGE Main type not specified
!SESSION 2015-05-06 14:37:44.381 -----------------------------------------------
eclipse.buildId=4.4.2.M20150204-1700
java.version=1.8.0_45
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product

!ENTRY org.eclipse.core.resources 2 10035 2015-05-06 14:37:53.389
!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-05-06 14:38:56.104
!MESSAGE Category com.google.gwt.facet has not been defined. It is used in plugin com.google.gwt.eclipse.wtp.

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-05-06 14:39:38.972
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.gwt.eclipse.core 4 0 2015-05-06 14:41:55.695
!MESSAGE Could not stop source viewer server.
!STACK 0
java.lang.ExceptionInInitializerError
at com.google.gdt.eclipse.platform.jetty.JettyServer.initLogging(JettyServer.java:40)
at com.google.gdt.eclipse.platform.jetty.JettyServer.(JettyServer.java:30)
at com.google.gwt.eclipse.core.GWTPlugin.stop(GWTPlugin.java:149)
at org.eclipse.osgi.internal.framework.BundleContextImpl$4.run(BundleContextImpl.java:827)
at org.eclipse.osgi.internal.framework.BundleContextImpl$4.run(BundleContextImpl.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.internal.framework.BundleContextImpl.stop(BundleContextImpl.java:820)
at org.eclipse.osgi.internal.framework.EquinoxBundle.stopWorker0(EquinoxBundle.java:950)
at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.stopWorker(EquinoxBundle.java:324)
at org.eclipse.osgi.container.Module.doStop(Module.java:626)
at org.eclipse.osgi.container.Module.stop(Module.java:488)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.decStartLevel(ModuleContainer.java:1623)
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1542)
at org.eclipse.osgi.container.SystemModule.stopWorker(SystemModule.java:248)
at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule.stopWorker(EquinoxBundle.java:145)
at org.eclipse.osgi.container.Module.doStop(Module.java:626)
at org.eclipse.osgi.container.Module.stop(Module.java:488)
at org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:186)
at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:160)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Logging bundle must not be null.
at org.eclipse.core.internal.runtime.Log.(Log.java:30)
at org.eclipse.core.internal.runtime.InternalPlatform.getLog(InternalPlatform.java:351)
at org.eclipse.core.runtime.Platform.getLog(Platform.java:1017)
at com.google.gdt.eclipse.platform.jetty.JettyEclipseLogger.(JettyEclipseLogger.java:35)
... 20 more
!SESSION 2015-05-06 14:41:58.769 -----------------------------------------------
eclipse.buildId=4.4.2.M20150204-1700
java.version=1.8.0_45
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product

!ENTRY org.eclipse.ui.navigator 2 0 2015-05-06 14:43:49.813
!MESSAGE Can't find Navigator Content Descriptor with id: org.eclipse.jst.servlet.ui.EnhancedJavaRendering

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-05-06 14:45:46.839
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY org.eclipse.wst.common.project.facet.core 4 0 2015-05-06 14:45:52.338
!MESSAGE Project facet wst.jsdt.web has not been defined. It is used in plugin org.eclipse.jst.server.core.

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-05-06 14:46:30.962
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.core 4 0 2015-05-06 14:47:20.163
!MESSAGE Datanucleus enhancer terminated with exit code 1.
Navigate to the console view for "Datanucleus Enhancer" for more information

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-05-06 14:47:30.986
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

!ENTRY com.google.appengine.eclipse.wtp.maven 1 0 2015-05-06 14:47:38.741
!MESSAGE GaeProjectConfigurator.getBuildParticipant invoked

```