If a job runs before the previous run has completed its RTC checkout phase
the previous job reports an error, and the change information for the first job is lost. Enabling a "quiet time" helps avoid the problem, but that adds a long fixed delay in all cases - not just when the actual checkout phase would overlap.

Limiting the overlap exposure to just the "accepting changes" portion rather than the entire checkout duration would help some.

If it would help, I work at IBM and could help reproduce this or test a fix, reach out to mstave@us.ibm.com

RTC : checkout...
12:35:09 RTC Checkout : Source control setup
12:35:10 RTC Checkout : Accepting changes into workspace "myWorkspaceName" ...
12:36:03 RTC Checkout : Fetching files to fetch destination "/tmp/slavePath/workspace/myProjectName" ...
12:37:27 FATAL: RTC : checkout failure: The configuration of the build workspace changed (possibly by a concurrent build) during the load.
12:37:28 com.ibm.team.build.common.TeamBuildException: The configuration of the build workspace changed (possibly by a concurrent build) during the load.
12:37:28 at com.ibm.team.build.internal.scm.SourceControlUtility.updateFileCopyArea(SourceControlUtility.java:704)
12:37:28 at com.ibm.team.build.internal.hjplugin.rtc.RepositoryConnection.checkout(RepositoryConnection.java:436)
12:37:28 at com.ibm.team.build.internal.hjplugin.rtc.RTCFacade.checkout(RTCFacade.java:390)
12:37:28 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
12:37:28 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:94)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:619)
12:37:28 at com.ibm.team.build.internal.hjplugin.RTCFacadeFactory$RTCFacadeWrapper.invoke(RTCFacadeFactory.java:115)
12:37:28 at com.ibm.team.build.internal.hjplugin.RTCCheckoutTask.invoke(RTCCheckoutTask.java:166)
12:37:28 at com.ibm.team.build.internal.hjplugin.RTCCheckoutTask.invoke(RTCCheckoutTask.java:32)
12:37:28 at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2484)
12:37:28 at hudson.remoting.UserRequest.perform(UserRequest.java:118)
12:37:28 at hudson.remoting.UserRequest.perform(UserRequest.java:48)
12:37:28 at hudson.remoting.Request$2.run(Request.java:328)
12:37:28 at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
12:37:28 at java.util.concurrent.FutureTask.run(FutureTask.java:273)
12:37:28 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1170)
12:37:28 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:640)
12:37:28 at java.lang.Thread.run(Thread.java:853)
12:37:28 Caused by: com.ibm.team.repository.common.StaleDataException: The configuration for 'Workspace 'myWorkspaceName':Component 'myComponentA'' is more recent in the repository than the version you have. This usually means that another client has modified it first. Please refresh and try again.
12:37:28 at com.ibm.team.scm.service.internal.ScmServiceInternal.validateSync(ScmServiceInternal.java:980)
12:37:28 at com.ibm.team.scm.service.internal.ScmServiceInternal.validateSyncTimes(ScmServiceInternal.java:890)
12:37:28 at com.ibm.team.scm.service.internal.ScmService$65.run(ScmService.java:2958)
12:37:28 at com.ibm.team.scm.service.internal.AbstractScmService$5.run(AbstractScmService.java:743)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runTransaction(RepositoryDatabase.java:347)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runInTransaction(RepositoryDatabase.java:271)
12:37:28 at com.ibm.team.repository.service.internal.PrimitiveTransactionService.runInTransaction(PrimitiveTransactionService.java:96)
12:37:28 at sun.reflect.GeneratedMethodAccessor172.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy275.runInTransaction(null)
12:37:28 at com.ibm.team.repository.service.internal.TransactionService.runInTransaction(TransactionService.java:45)
12:37:28 at sun.reflect.GeneratedMethodAccessor328.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy446.runInTransaction(null)
12:37:28 at com.ibm.team.scm.service.internal.AbstractScmService.runInTransaction(AbstractScmService.java:346)
12:37:28 at com.ibm.team.scm.service.internal.AbstractScmService.runInTransaction(AbstractScmService.java:734)
12:37:28 at com.ibm.team.scm.service.internal.AbstractScmService.runInTransaction(AbstractScmService.java:712)
12:37:28 at com.ibm.team.scm.service.internal.ScmService.validateSyncTimes(ScmService.java:2954)
12:37:28 at sun.reflect.GeneratedMethodAccessor970.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy1423.validateSyncTimes(null)
12:37:28 at com.ibm.team.filesystem.service.internal.operations.FileTreeOperation.initConfigState(FileTreeOperation.java:369)
12:37:28 at com.ibm.team.filesystem.service.internal.operations.FileTreeOperation.run(FileTreeOperation.java:102)
12:37:28 at com.ibm.team.filesystem.service.internal.FilesystemServiceInternal.getFileTreeByVersionable4(FilesystemServiceInternal.java:781)
12:37:28 at com.ibm.team.filesystem.service.internal.FilesystemService$17.run(FilesystemService.java:813)
12:37:28 at com.ibm.team.repository.service.internal.PrimitiveTransactionService$3.run(PrimitiveTransactionService.java:163)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase$Transaction.run(RepositoryDatabase.java:496)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase$1.run(RepositoryDatabase.java:320)
12:37:28 at com.ibm.team.repository.service.internal.rdb.ConnectionPoolService.withCurrentConnection(ConnectionPoolService.java:448)
12:37:28 at sun.reflect.GeneratedMethodAccessor104.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy187.withCurrentConnection(null)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runTransaction(RepositoryDatabase.java:316)
12:37:28 at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runInTransaction(RepositoryDatabase.java:271)
12:37:28 at com.ibm.team.repository.service.internal.PrimitiveTransactionService.runInTransaction(PrimitiveTransactionService.java:96)
12:37:28 at com.ibm.team.repository.service.internal.PrimitiveTransactionService.runInTransaction(PrimitiveTransactionService.java:91)
12:37:28 at sun.reflect.GeneratedMethodAccessor279.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy274.runInTransaction(null)
12:37:28 at com.ibm.team.repository.service.AbstractService.runInTransaction(AbstractService.java:967)
12:37:28 at com.ibm.team.filesystem.service.internal.FilesystemService.getFileTreeByVersionable4(FilesystemService.java:807)
12:37:28 at sun.reflect.GeneratedMethodAccessor936.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
12:37:28 at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)
12:37:28 at com.sun.proxy.$Proxy1448.getFileTreeByVersionable4(null)
12:37:28 at sun.reflect.GeneratedMethodAccessor936.invoke(null)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:611)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.handleMethod(AbstractTeamServerServlet.java:1421)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.executeMethod(AbstractTeamServerServlet.java:956)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.doPost(AbstractTeamServerServlet.java:729)
12:37:28 at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.handleRequest2(AbstractTeamServerServlet.java:2362)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.handleRequest(AbstractTeamServerServlet.java:2153)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.access$0(AbstractTeamServerServlet.java:2138)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet$1.service(AbstractTeamServerServlet.java:219)
12:37:28 at com.ibm.team.repository.internal.service.auth.impl.JAuthHandler$1.run(JAuthHandler.java:109)
12:37:28 at com.ibm.team.repository.servlet.AbstractTeamServerServlet.service(AbstractTeamServerServlet.java:1792)
12:37:28 at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
12:37:28 at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:180)
12:37:28 at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
12:37:28 at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:126)
12:37:28 at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:76)
12:37:28 at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
12:37:28 at org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:120)
12:37:28 at com.ibm.team.repository.server.servletbridge.JazzServlet.service(JazzServlet.java:74)
12:37:28 at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
12:37:28 at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1694)
12:37:28 at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1635)
12:37:28 at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:149)
12:37:28 at com.ibm.team.repository.server.servletbridge.BridgeFilter.processDelegate(BridgeFilter.java:165)
12:37:28 at com.ibm.team.repository.server.servletbridge.BridgeFilter.doFilter(BridgeFilter.java:198)
12:37:28 at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
12:37:28 at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:125)
12:37:28 at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:80)
12:37:28 at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:908)
12:37:28 at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:965)
12:37:28 at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:508)
12:37:28 at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:181)
12:37:28 at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3994)
12:37:28 at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
12:37:28 at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:945)
12:37:28 at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1592)
12:37:28 at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:191)
12:37:28 at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:454)
12:37:28 at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:516)
12:37:28 at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:307)
12:37:28 at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:278)
12:37:28 at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:1049)
12:37:28 at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.readyInboundPostHandshake(SSLConnectionLink.java:717)
12:37:28 at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyHandshakeCompletedCallback.complete(SSLConnectionLink.java:413)
12:37:28 at com.ibm.ws.ssl.channel.impl.SSLUtils.handleHandshake(SSLUtils.java:1072)
12:37:28 at com.ibm.ws.ssl.channel.impl.SSLHandshakeIOCallback.complete(SSLHandshakeIOCallback.java:87)
12:37:28 at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
12:37:28 at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
12:37:28 at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
12:37:28 at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
12:37:28 at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
12:37:28 at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
12:37:28 at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
12:37:28 at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1662)
12:37:28 at com.ibm.team.repository.common.internal.marshal.util.MarshallerUtil.decodeExceptions(MarshallerUtil.java:340)
12:37:28 at com.ibm.team.repository.common.internal.marshal.util.MarshallerUtil.decodeExceptions(MarshallerUtil.java:310)
12:37:28 at com.ibm.team.repository.common.internal.marshal.util.MarshallerUtil.decodeFault(MarshallerUtil.java:275)
12:37:28 at com.ibm.team.repository.transport.client.RemoteTeamService.constructExceptionFromFault(RemoteTeamService.java:609)
12:37:28 at com.ibm.team.repository.transport.client.RemoteTeamService.executeMethod(RemoteTeamService.java:493)
12:37:28 at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(RemoteTeamService.java:194)
12:37:28 at com.ibm.team.repository.transport.client.ServiceInvocationHandler.invoke(ServiceInvocationHandler.java:43)
12:37:28 at com.sun.proxy.$Proxy35.getFileTreeByVersionable4(Unknown Source)
12:37:28 at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:619)
12:37:28 at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeServiceCall(ServiceInterfaceProxy.java:254)
12:37:28 at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(ServiceInterfaceProxy.java:110)
12:37:28 at com.sun.proxy.$Proxy35.getFileTreeByVersionable4(Unknown Source)
12:37:28 at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
12:37:28 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
12:37:28 at java.lang.reflect.Method.invoke(Method.java:619)
12:37:28 at com.ibm.team.scm.client.internal.ScmServiceInterfaceProxy$2.run(ScmServiceInterfaceProxy.java:168)
12:37:28 at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepository.java:1320)
12:37:28 at com.ibm.team.repository.common.transport.CancelableCaller.call(CancelableCaller.java:79)
12:37:28 at com.ibm.team.repository.client.internal.TeamRepository.callCancelableService(TeamRepository.java:1315)
12:37:28 at com.ibm.team.scm.client.internal.ScmClientLibraryContext.callCancelableService(ScmClientLibraryContext.java:71)
12:37:28 at com.ibm.team.scm.client.internal.ScmServiceInterfaceProxy.invokeCancelableService(ScmServiceInterfaceProxy.java:164)
12:37:28 at com.ibm.team.scm.client.internal.ScmServiceInterfaceProxy.invoke(ScmServiceInterfaceProxy.java:92)
12:37:28 at com.sun.proxy.$Proxy35.getFileTreeByVersionable4(Unknown Source)
12:37:28 at com.ibm.team.filesystem.client.internal.FileSystemServiceProxy.getFileTreeByVersionable(FileSystemServiceProxy.java:287)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.LoadOperation.load(LoadOperation.java:1029)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.LoadOperation$1.run(LoadOperation.java:682)
12:37:28 at com.ibm.team.filesystem.client.internal.SharingManager.runWithinFileSystemLock(SharingManager.java:935)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.runWithinFileSystemLock(FileSystemOperation.java:164)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.runWithinFileSystemLock(FileSystemOperation.java:144)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.LoadOperation.execute(LoadOperation.java:720)
12:37:28 at com.ibm.team.filesystem.client.internal.operations.FileSystemOperation.run(FileSystemOperation.java:89)
12:37:28 at com.ibm.team.build.internal.scm.SourceControlUtility.updateFileCopyArea(SourceControlUtility.java:686)
12:37:28 ... 18 more
12:37:28 FATAL: RTC : checkout failure: RTC : checkout failure: The configuration of the build workspace changed (possibly by a concurrent build) during the load.
12:37:28 hudson.AbortException: RTC : checkout failure: The configuration of the build workspace changed (possibly by a concurrent build) during the load.
12:37:28 at com.ibm.team.build.internal.hjplugin.RTCCheckoutTask.invoke(RTCCheckoutTask.java:199)
12:37:28 at com.ibm.team.build.internal.hjplugin.RTCCheckoutTask.invoke(RTCCheckoutTask.java:32)
12:37:28 at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2484)
12:37:28 at hudson.remoting.UserRequest.perform(UserRequest.java:118)
12:37:28 at hudson.remoting.UserRequest.perform(UserRequest.java:48)
12:37:28 at hudson.remoting.Request$2.run(Request.java:328)
12:37:28 at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
12:37:28 at java.util.concurrent.FutureTask.run(FutureTask.java:273)
12:37:28 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1170)
12:37:28 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:640)
12:37:28 at java.lang.Thread.run(Thread.java:853)
12:37:28 ERROR: RTC : checkout failure: RTC : checkout failure: The configuration of the build workspace changed (possibly by a concurrent build) during the load.