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java.io.IOException: Owner 'mapred' for path /mnt/mapred/export0/sharenfs-compute-3/taskTracker/joe/jobcache/job_201303120619_0009/attempt_201303120619_0009_m_000001_2/output/file.out.index did not match expected owner 'root'	at org.apache.hadoop.io.SecureIOUtils.checkStat(SecureIOUtils.java:177)	at org.apache.hadoop.io.SecureIOUtils.openForRead(SecureIOUtils.java:117)	at org.apache.hadoop.mapred.SpillRecord.(SpillRecord.java:61)	at org.apache.hadoop.mapred.SpillRecord.(SpillRecord.java:54)	at org.apache.hadoop.mapred.IndexCache.readIndexFileToCache(IndexCache.java:109)	at org.apache.hadoop.mapred.IndexCache.getIndexInformation(IndexCache.java:66)	at org.apache.hadoop.mapred.TaskTracker$MapOutputServlet.doGet(TaskTracker.java:3850)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)	at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:835)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:326)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)