Hadop namenode cannot exit safemode

Question

Everything.

I am using hasoop2.6.0.

When I force hadoop to leave safe mode using hdfs dfsadmin -safemode leave, it shows Safe mode is OFF, but I still can’t delete the file in the directory, the result shows that: rm: Cannot delete /mei/app-20151013055617-0001-614d554c-cc04-4800-9be8-7d9b3fd3fcef. Name node is in safe mode. I am trying to solve this problem using the enumeration method on the Internet, it does not work ...

I use the command "hdfs dfsadmin -report", it shows:

    Safe mode is ON
    Configured Capacity: 52710469632 (49.09 GB)
    Present Capacity: 213811200 (203.91 MB)
    DFS Remaining: 0 (0 B)
    DFS Used: 213811200 (203.91 MB)
    DFS Used%: 100.00%
    Under replicated blocks: 39
    Blocks with corrupt replicas: 0
    Missing blocks: 0

    -------------------------------------------------
    Live datanodes (1):

    Name: 127.0.0.1:50010 (bdrhel6)
    Hostname: bdrhel6
    Decommission Status : Normal
    Configured Capacity: 52710469632 (49.09 GB)
    DFS Used: 213811200 (203.91 MB)
    Non DFS Used: 52496658432 (48.89 GB)
    DFS Remaining: 0 (0 B)
    DFS Used%: 0.41%
    DFS Remaining%: 0.00%
    Configured Cache Capacity: 0 (0 B)
    Cache Used: 0 (0 B)
    Cache Remaining: 0 (0 B)
    Cache Used%: 100.00%
    Cache Remaining%: 0.00%
    Xceivers: 1
    Last contact: Wed Oct 14 03:30:33 EDT 2015

Does anyone have the same problem?

Any help on this.

Answer 1

Safemode - HDFS, ; , . NameNode, DataNodes NameNode , , NameNode , .. NameNode , ; dfs.safemode.threshold.pct parameter. threshold Safemode, HDFS .

1. Below command forces the NameNode to exit safemode

   hdfs dfsadmin -safemode leave

2. Run hdfs fsck -move or hdfs fsck -delete to move or delete corrupted files.

, , NN. , safe mode . If you turn off safe mode before adding more resources or freeing up resource, the NameNode will immediately return to safe mode.

:

• Hadoop Tutorial-YDN

• fsck

Answer 2

. , hadoop . hadoop safemode, hadoop. cloudera hadoop, cloudera. . :

    [cloudera@quickstart ~]$ hdfs dfsadmin -safemode leave | hadoop fs -rm -r <file on hdfs to be deleted>

!

Answer 3

Run:

hdfs dfsadmin -safemode forceExit

helped.