git clone http://fuse-test.apps.example.com/git/fabric hangs on 48-core machine

"qtp794478413-275" prio=10 tid=0x00007f06e0008000 nid=0x5a66 runnable [0x00007f088c676000]
   java.lang.Thread.State: RUNNABLE
	at org.eclipse.jgit.internal.storage.pack.DeltaTask$Block.partitionTasks(DeltaTask.java:161)
	at org.eclipse.jgit.internal.storage.pack.PackWriter.parallelDeltaSearch(PackWriter.java:1366)
	at org.eclipse.jgit.internal.storage.pack.PackWriter.searchForDeltas(PackWriter.java:1333)
	at org.eclipse.jgit.internal.storage.pack.PackWriter.searchForDeltas(PackWriter.java:1291)
	at org.eclipse.jgit.internal.storage.pack.PackWriter.writePack(PackWriter.java:1018)
	at org.eclipse.jgit.transport.UploadPack.sendPack(UploadPack.java:1415)
	at org.eclipse.jgit.transport.UploadPack.sendPack(UploadPack.java:1269)
	at org.eclipse.jgit.transport.UploadPack.service(UploadPack.java:717)
	at org.eclipse.jgit.transport.UploadPack.upload(UploadPack.java:628)
	at org.eclipse.jgit.http.server.UploadPackServlet.doPost(UploadPackServlet.java:187)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:595)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at org.eclipse.jgit.http.server.glue.UrlPipeline$Chain.doFilter(UrlPipeline.java:237)
	at org.eclipse.jgit.http.server.UploadPackServlet$Factory.doFilter(UploadPackServlet.java:145)
	at org.eclipse.jgit.http.server.glue.UrlPipeline$Chain.doFilter(UrlPipeline.java:235)
	at org.eclipse.jgit.http.server.RepositoryFilter.doFilter(RepositoryFilter.java:151)
	at org.eclipse.jgit.http.server.glue.UrlPipeline$Chain.doFilter(UrlPipeline.java:235)
	at org.eclipse.jgit.http.server.NoCacheFilter.doFilter(NoCacheFilter.java:80)
	at org.eclipse.jgit.http.server.glue.UrlPipeline$Chain.doFilter(UrlPipeline.java:235)
	at org.eclipse.jgit.http.server.glue.UrlPipeline.service(UrlPipeline.java:215)
	at org.eclipse.jgit.http.server.glue.SuffixPipeline.service(SuffixPipeline.java:101)
	at org.eclipse.jgit.http.server.glue.MetaFilter.doFilter(MetaFilter.java:175)
	at org.eclipse.jgit.http.server.glue.MetaServlet.service(MetaServlet.java:133)
	at io.fabric8.git.http.FabricGitServlet.service(FabricGitServlet.java:77)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:69)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:240)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:77)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:370)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
	at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:982)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1043)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:745)