An error was detected while performing the engine operation and the changes are being rolled back. See the log for details.
ERROR: org.eclipse.equinox.p2.engine code=4 An error occurred while collecting items to be installed
  at org.eclipse.oomph.util.OomphPlugin.coreException(OomphPlugin.java:280)
  at org.eclipse.oomph.p2.internal.core.ProfileTransactionImpl$3.commit(ProfileTransactionImpl.java:547)
  at org.eclipse.oomph.p2.internal.core.ProfileTransactionImpl.commit(ProfileTransactionImpl.java:340)
  at org.eclipse.oomph.setup.p2.impl.P2TaskImpl.perform(P2TaskImpl.java:729)
  at org.eclipse.oomph.setup.internal.core.SetupTaskPerformer.doPerformNeededSetupTasks(SetupTaskPerformer.java:3324)
  at org.eclipse.oomph.setup.internal.core.SetupTaskPerformer.performNeededSetupTasks(SetupTaskPerformer.java:3252)
  at org.eclipse.oomph.setup.internal.core.SetupTaskPerformer.performTriggeredSetupTasks(SetupTaskPerformer.java:3233)
  at org.eclipse.oomph.setup.internal.core.SetupTaskPerformer.perform(SetupTaskPerformer.java:3133)
  at org.eclipse.oomph.setup.ui.wizards.ProgressPage$9.run(ProgressPage.java:575)
  at org.eclipse.oomph.setup.ui.wizards.ProgressPage$11$1.run(ProgressPage.java:701)
  at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
  ERROR: org.eclipse.equinox.p2.engine code=0 session context was:(profile=_Users_tbroyles_MDHTAnalysis-neon_MDHTAnalysis.app_Contents_Eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
  ERROR: org.eclipse.equinox.p2.transport.ecf code=1002 HTTP Server 'Gateway Timeout': http://oht-modeling.sourceforge.net/updates/ccda/plugins/org.openhealthtools.mdht.uml.cda.ccd.doc_3.0.0.201706301116.jar
  ERROR: org.eclipse.ecf.identity code=0 HttpComponents connection error response code 504.
    at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.openStreams(HttpClientRetrieveFileTransfer.java:667)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:885)
    at org.eclipse.ecf.provider.filetransfer.retrieve.MultiProtocolRetrieveAdapter.sendRetrieveRequest(MultiProtocolRetrieveAdapter.java:146)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.sendRetrieveRequest(FileReader.java:424)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.readInto(FileReader.java:360)
    at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.download(RepositoryTransport.java:101)
    at org.eclipse.oomph.p2.internal.core.CachingTransport.download(CachingTransport.java:135)
    at org.eclipse.oomph.p2.internal.core.CachingTransport.download(CachingTransport.java:255)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.downloadArtifact(SimpleArtifactRepository.java:678)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.downloadArtifact(SimpleArtifactRepository.java:600)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.getArtifact(SimpleArtifactRepository.java:732)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.getArtifact(MirrorRequest.java:319)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.transferSingle(MirrorRequest.java:288)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.transfer(MirrorRequest.java:223)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.perform(MirrorRequest.java:153)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.getArtifact(SimpleArtifactRepository.java:716)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.DownloadJob.run(DownloadJob.java:63)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
  ERROR: org.eclipse.equinox.p2.transport.ecf code=1002 HTTP Server 'Gateway Timeout': http://oht-modeling.sourceforge.net/updates/ccda/plugins/org.openhealthtools.mdht.uml.cda.ihe_3.0.0.201706301116.jar
  ERROR: org.eclipse.ecf.identity code=0 HttpComponents connection error response code 504.
    at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.openStreams(HttpClientRetrieveFileTransfer.java:667)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:885)
    at org.eclipse.ecf.provider.filetransfer.retrieve.MultiProtocolRetrieveAdapter.sendRetrieveRequest(MultiProtocolRetrieveAdapter.java:146)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.sendRetrieveRequest(FileReader.java:424)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.readInto(FileReader.java:360)
    at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.download(RepositoryTransport.java:101)
    at org.eclipse.oomph.p2.internal.core.CachingTransport.download(CachingTransport.java:135)
    at org.eclipse.oomph.p2.internal.core.CachingTransport.download(CachingTransport.java:255)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.downloadArtifact(SimpleArtifactRepository.java:678)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.downloadArtifact(SimpleArtifactRepository.java:600)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.getArtifact(SimpleArtifactRepository.java:732)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.getArtifact(MirrorRequest.java:319)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.transferSingle(MirrorRequest.java:288)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.transfer(MirrorRequest.java:223)
    at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.perform(MirrorRequest.java:153)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository.getArtifact(SimpleArtifactRepository.java:716)
    at org.eclipse.equinox.internal.p2.artifact.repository.simple.DownloadJob.run(DownloadJob.java:63)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)