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通過我的Web應用程序，我嘗試運行mapreduce作業。將應用程序部署Tomcat服務器上時，地圖上減少作業運行 我得到follwing例外Hadoop PriviledgedActionException
15/12/17 23:38:36 ERROR security.UserGroupInformation: PriviledgedActionException as:tomcat7 cause:org.apache.hadoo
p.security.AccessControlException: Permission denied: user=tomcat7, access=WRITE, inode="":hduser:supergroup:rwxr-x
r-x
15/12/17 23:38:36 INFO ipc.Server: IPC Server handler 6 on 54310, call mkdirs(/out/StichedFile/_temporary, rwxr-xr-
x) from 104.154.95.48:41285: error: org.apache.hadoop.security.AccessControlException: Permission denied: user=tomc
at7, access=WRITE, inode="":hduser:supergroup:rwxr-xr-x
org.apache.hadoop.security.AccessControlException: Permission denied: user=tomcat7, access=WRITE, inode="":hduser:s
upergroup:rwxr-xr-x
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:217)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:197)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:141)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5758)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkAncestorAccess(FSNamesystem.java:5731)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2502)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2469)
at org.apache.hadoop.hdfs.server.namenode.NameNode.mkdirs(NameNode.java:911)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1432)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1428)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1426)
如何擺脫這個問題？