when testing ceph giant through librados adapter, some errors like EINPROGRESS raises

[ywang19]

error stack as following:
2015-03-20 06:38:04,595 [DEBUG] [AbstractHttpTasklet] - [ << ] - HTTP/1.1 500 Internal Server Error {"error":"com.ceph.rados.exceptions.RadosOperationInProgressException: Failed to connect to the Ceph cluster; EINPROGRESS: Operation now in progress (-115)","succ":false,"code":500}
2015-03-20 06:38:04,591 [ERROR] [AbstractCommandHandler] - unexpected error
com.intel.cosbench.api.storage.StorageException: com.ceph.rados.exceptions.RadosOperationInProgressException: Failed to connect to the Ceph cluster; EINPROGRESS: Operation now in progress (-115)
at com.intel.cosbench.api.librados.LibradosStorage.init(LibradosStorage.java:75)
at com.intel.cosbench.driver.service.COSBStorageAPIService.getStorage(COSBStorageAPIService.java:54)
at com.intel.cosbench.driver.service.MissionHandler.createStorageApi(MissionHandler.java:210)
at com.intel.cosbench.driver.service.MissionHandler.createWorkerContext(MissionHandler.java:197)
at com.intel.cosbench.driver.service.MissionHandler.createWorkers(MissionHandler.java:185)
at com.intel.cosbench.driver.service.MissionHandler.init(MissionHandler.java:100)
at com.intel.cosbench.driver.service.COSBDriverService.createHandler(COSBDriverService.java:111)
at com.intel.cosbench.driver.service.COSBDriverService.submit(COSBDriverService.java:82)
at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:71)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:54)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy20.submit(Unknown Source)
at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:71)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:54)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy5.submit(Unknown Source)
at com.intel.cosbench.driver.handler.SubmitHandler.process(SubmitHandler.java:38)
at com.intel.cosbench.driver.handler.AbstractCommandHandler.handleRequest(AbstractCommandHandler.java:76)
at com.intel.cosbench.driver.handler.SubmitHandler.handleRequest(SubmitHandler.java:1)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.ceph.rados.exceptions.RadosOperationInProgressException: Failed to connect to the Ceph cluster; EINPROGRESS: Operation now in progress (-115)
at com.ceph.rados.RadosBase.throwException(RadosBase.java:89)
at com.ceph.rados.RadosBase.handleReturnCode(RadosBase.java:50)
at com.ceph.rados.Rados.connect(Rados.java:150)
at com.intel.cosbench.api.librados.LibradosStorage.init(LibradosStorage.java:72)
... 60 more