Drive: random failure in test_sync_delete_root

20:53:23      [exec] nxdrive.client.base_automation_client: DEBUG: org.nuxeo.ecm.automation.OperationException: Failed to invoke operation NuxeoDrive.GetChildren
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.InvokableMethod.invoke(InvokableMethod.java:140)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.CompiledChainImpl.doInvoke(CompiledChainImpl.java:114)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.CompiledChainImpl.invoke(CompiledChainImpl.java:96)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.OperationServiceImpl.run(OperationServiceImpl.java:81)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.server.jaxrs.OperationResource.execute(OperationResource.java:42)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.server.jaxrs.ExecutableResource.doPost(ExecutableResource.java:51)
20:53:23      [exec] 	at sun.reflect.GeneratedMethodAccessor149.invoke(Unknown Source)
20:53:23      [exec] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
20:53:23      [exec] 	at java.lang.reflect.Method.invoke(Method.java:597)
20:53:23      [exec] 	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
20:53:23      [exec] 	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ObjectOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:258)
20:53:23      [exec] 	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:134)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
20:53:23      [exec] 	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
20:53:23      [exec] 	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
20:53:23      [exec] 	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
20:53:23      [exec] 	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
20:53:23      [exec] 	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
20:53:23      [exec] 	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
20:53:23      [exec] 	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
20:53:23      [exec] 	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.containerService(WebEngineServlet.java:60)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.service(WebEngineServlet.java:44)
20:53:23      [exec] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.jaxrs.session.SessionCleanupFilter.run(SessionCleanupFilter.java:45)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:43)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.app.WebEngineFilter.doFilter(WebEngineFilter.java:92)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.jaxrs.context.RequestContextFilter.run(RequestContextFilter.java:42)
20:53:23      [exec] 	at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:43)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.wss.servlet.BaseWSSFilter.doFilter(BaseWSSFilter.java:137)
20:53:23      [exec] 	at org.nuxeo.wss.servlet.FailSafeWSSFilter.doFilter(FailSafeWSSFilter.java:55)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:129)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:145)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.wi.filter.WIRequestFilter.doFilter(WIRequestFilter.java:114)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilterInternal(NuxeoAuthenticationFilter.java:553)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter.doFilter(NuxeoAuthenticationFilter.java:347)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:79)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:59)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
20:53:23      [exec] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
20:53:23      [exec] 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
20:53:23      [exec] 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
20:53:23      [exec] 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
20:53:23      [exec] 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
20:53:23      [exec] 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
20:53:23      [exec] 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
20:53:23      [exec] 	at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
20:53:23      [exec] 	at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
20:53:23      [exec] 	at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
20:53:23      [exec] 	at java.lang.Thread.run(Thread.java:662)
20:53:23      [exec] Caused by: org.nuxeo.ecm.core.api.ClientException: Cannot get the children of file system item with id userSyncRootParentFactory#default#34eb85ea-1366-4843-8e3d-cbacd015fa74 because it doesn't exist.
20:53:23      [exec] 	at org.nuxeo.drive.service.impl.FileSystemItemManagerImpl.getChildren(FileSystemItemManagerImpl.java:158)
20:53:23      [exec] 	at org.nuxeo.drive.operations.NuxeoDriveGetChildren.run(NuxeoDriveGetChildren.java:56)
20:53:23      [exec] 	at sun.reflect.GeneratedMethodAccessor181.invoke(Unknown Source)
20:53:23      [exec] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
20:53:23      [exec] 	at java.lang.reflect.Method.invoke(Method.java:597)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.InvokableMethod.doInvoke(InvokableMethod.java:117)
20:53:23      [exec] 	at org.nuxeo.ecm.automation.core.impl.InvokableMethod.invoke(InvokableMethod.java:132)
20:53:23      [exec] 	... 73 more