Just started seeing this - possibly related to using the iCloud binding? How to determine?
2018-09-04 09:44:11.108 [WARN ] [eclipse.jetty.servlet.ServletHandler] -
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.OutOfMemoryError: unable to create new native thread
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489) [167:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) [167:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) [167:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) [167:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) [167:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at com.eclipsesource.jaxrs.publisher.internal.ServletContainerBridge.service(ServletContainerBridge.java:76) [15:com.eclipsesource.jaxrs.publisher:5.3.1.201602281253]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:848) [85:org.eclipse.jetty.servlet:9.3.21.v20170918]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584) [85:org.eclipse.jetty.servlet:9.3.21.v20170918]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71) [183:org.ops4j.pax.web.pax-web-jetty:6.0.9]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [82:org.eclipse.jetty.security:9.3.21.v20170918]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:284) [183:org.ops4j.pax.web.pax-web-jetty:6.0.9]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512) [85:org.eclipse.jetty.servlet:9.3.21.v20170918]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80) [183:org.ops4j.pax.web.pax-web-jetty:6.0.9]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.Server.handle(Server.java:534) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:333) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [84:org.eclipse.jetty.server:9.3.21.v20170918]
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283) [76:org.eclipse.jetty.io:9.3.21.v20170918]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108) [76:org.eclipse.jetty.io:9.3.21.v20170918]
at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) [76:org.eclipse.jetty.io:9.3.21.v20170918]
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) [87:org.eclipse.jetty.util:9.3.21.v20170918]
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) [87:org.eclipse.jetty.util:9.3.21.v20170918]
at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) [87:org.eclipse.jetty.util:9.3.21.v20170918]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) [87:org.eclipse.jetty.util:9.3.21.v20170918]
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) [87:org.eclipse.jetty.util:9.3.21.v20170918]
at java.lang.Thread.run(Thread.java:748) [?:?]