Thanks for the info Alex Regards, Mohammad Tariq
On Tue, Nov 29, 2011 at 1:09 PM, Alexander C.H. Lorenz <wget.n...@googlemail.com> wrote: > Hi, > the user "webuser" is a internal user (dfs.web.ugi = webuser, webgroup) and > can be configured. This is the superuser, can read all content and is > usually used by the webinterfaces. You can add a system user (adduser > webuser -g webgroup). > - Alex > > On Mon, Nov 28, 2011 at 9:21 PM, Mohammad Tariq <donta...@gmail.com> wrote: >> >> Hello, >> >> Although the namenode is running properly I can see the below shown >> warning in the log file.Could anyone tell me its meaning???? >> >> 2011-11-29 01:42:30,582 WARN >> org.apache.hadoop.security.ShellBasedUnixGroupsMapping: got exception >> trying to get groups for user webuser >> org.apache.hadoop.util.Shell$ExitCodeException: id: webuser: No such user >> >> at org.apache.hadoop.util.Shell.runCommand(Shell.java:255) >> at org.apache.hadoop.util.Shell.run(Shell.java:182) >> at >> org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:375) >> at org.apache.hadoop.util.Shell.execCommand(Shell.java:461) >> at org.apache.hadoop.util.Shell.execCommand(Shell.java:444) >> at >> org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getUnixGroups(ShellBasedUnixGroupsMapping.java:68) >> at >> org.apache.hadoop.security.ShellBasedUnixGroupsMapping.getGroups(ShellBasedUnixGroupsMapping.java:45) >> at org.apache.hadoop.security.Groups.getGroups(Groups.java:79) >> at >> org.apache.hadoop.security.UserGroupInformation.getGroupNames(UserGroupInformation.java:966) >> at >> org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.<init>(FSPermissionChecker.java:50) >> at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5160) >> at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkTraverse(FSNamesystem.java:5143) >> at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:1992) >> at >> org.apache.hadoop.hdfs.server.namenode.NameNode.getFileInfo(NameNode.java:837) >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> at java.lang.reflect.Method.invoke(Method.java:597) >> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563) >> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388) >> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384) >> at java.security.AccessController.doPrivileged(Native Method) >> at javax.security.auth.Subject.doAs(Subject.java:396) >> at >> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059) >> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382) >> 2011-11-29 01:44:59,571 INFO >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Roll Edit Log >> from 127.0.0.1 >> 2011-11-29 01:44:59,572 INFO >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Number of >> transactions: 0 Total time for transactions(ms): 0Number of >> transactions batched in Syncs: 0 Number of syncs: 0 SyncTimes(ms): 0 >> 2011-11-29 01:45:02,416 INFO >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Roll FSImage from >> 127.0.0.1 >> 2011-11-29 01:45:02,416 INFO >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Number of >> transactions: 0 Total time for transactions(ms): 0Number of >> transactions batched in Syncs: 0 Number of syncs: 1 SyncTimes(ms): 109 >> >> Regards, >> Mohammad Tariq > > > > -- > Alexander Lorenz > http://mapredit.blogspot.com > P Think of the environment: please don't print this email unless you really > need to. > >
