was无法卸载包，卸载时候报这个错。。求大大解答

com.ibm.ws.sm.workspace.WorkSpaceException: RepositoryException while updating documents in master repository
at com.ibm.ws.sm.workspace.impl.WorkSpaceMasterRepositoryAdapter.update(WorkSpaceMasterRepositoryAdapter.java:686)
at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.update(RepositoryContextImpl.java:1827)
at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.synch(RepositoryContextImpl.java:1773)
at com.ibm.ws.sm.workspace.impl.WorkSpaceImpl.synch(WorkSpaceImpl.java:481)
at com.ibm.ws.console.core.action.SyncWorkSpaceAction.execute(SyncWorkSpaceAction.java:239)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1486)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:930)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.setUpCommandAssistence(WSCUrlFilter.java:792)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.continueStoringTaskState(WSCUrlFilter.java:363)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.doFilter(WSCUrlFilter.java:229)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:761)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:673)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:498)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:112)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:454)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:383)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)
Caused by: com.ibm.websphere.management.exception.DocumentIOException: Unable to backup document: cells/localhostNode01Cell/nodes/localhostNode01/serverindex.xml
at com.ibm.ws.management.repository.FileDocument.backup(FileDocument.java:347)
at com.ibm.ws.management.repository.FileDocument.backup(FileDocument.java:309)
at com.ibm.ws.management.repository.FileRepository.preModify(FileRepository.java:1112)
at com.ibm.ws.management.repository.FileRepository.preUpdate(FileRepository.java:1318)
at com.ibm.ws.management.repository.FileRepository.update(FileRepository.java:1280)
at com.ibm.ws.management.repository.client.LocalConfigRepositoryClient.update(LocalConfigRepositoryClient.java:189)
at com.ibm.ws.sm.workspace.impl.WorkSpaceMasterRepositoryAdapter.update(WorkSpaceMasterRepositoryAdapter.java:637)
... 38 more
Caused by: java.io.FileNotFoundException: /opt/IBM/WebSphere/AppServer/profiles/AppSrv01/config/backup/cells/localhostNode01Cell/nodes/localhostNode01/serverindex.xml (没有那个文件或目录)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.(FileOutputStream.java:205)
at java.io.FileOutputStream.(FileOutputStream.java:157)
at com.ibm.ws.management.repository.FileDocument.backup(FileDocument.java:340)
... 44 more