hello everyone,
I got an exception from my jobtracker's log file as follow:
2011-07-27 01:58:04,197 INFO org.apache.hadoop.mapred.JobTracker: Cleaning up
the system directory
2011-07-27 01:58:04,230 INFO org.apache.hadoop.mapred.JobTracker: problem
cleaning system
directory:hdfs://dn224.pengyun.org:56900/home/hadoop/hadoop-tmp203/mapred/system
org.apache.hadoop.ipc.RemoteException:
org.apache.hadoop.hdfs.server.namenode.SafeModeException:Cannot delete
/home/hadoop/hadoop-tmp203/mapred/system. Name node is in safe mode.
The ratio of reported blocks 0.2915 has not reached the threshold 0.9990. Safe
mode will be turned off automatically.
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.deleteInternal(FSNamesystem.java:1851)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:1831)
at org.apache.hadoop.hdfs.server.namenode.NameNode.delete(NameNode.java:691)
……
and
the log message of namenode:
2011-07-27 00:00:00,219 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1
on 56900, call delete(/home/hadoop/hadoop-tmp203/mapred/system, true) from
192.168.1.224:5131
2: error: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot
delete /home/hadoop/hadoop-tmp203/mapred/system. Name node is in safe mode.
The ratio of reported blocks 0.2915 has not reached the threshold 0.9990. Safe
mode will be turned off automatically.
org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete
/home/hadoop/hadoop-tmp203/mapred/system. Name node is in safe mode.
The ratio of reported blocks 0.2915 has not reached the threshold 0.9990. Safe
mode will be turned off automatically.
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.deleteInternal(FSNamesystem.java:1851)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:1831)
at org.apache.hadoop.hdfs.server.namenode.NameNode.delete(NameNode.java:691)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:523)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1383)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1379)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1377)
It means,I think,that the namenode is always being in the safe mode,so what
can i do about these exception.Anyone who can tell me why?I don't find the file
"/home/hadoop/hadoop-tmp203/mapred/system" in my system.The exception upon
which appearing in the log file are repeated,even when I restart my hadoop.
thanks for your concern.
----------------------------
Junqing Zhou
2ho...@163.com
