Cannot lock storage /tmp/hadoop-root/dfs/name. The directory is already locked.，hadoop-rootdfs


[root@nn01 bin]# ./hadoop namenode -format
12/05/21 06:13:51 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = nn01/127.0.0.1
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 0.20.2
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
Re-format filesystem in /tmp/hadoop-root/dfs/name ? (Y or N) Y
12/05/21 06:14:01 INFO namenode.FSNamesystem: fsOwner=root,root,bin,daemon,sys,adm,disk,wheel
12/05/21 06:14:01 INFO namenode.FSNamesystem: supergroup=supergroup
12/05/21 06:14:01 INFO namenode.FSNamesystem: isPermissionEnabled=true
12/05/21 06:14:01 INFO common.Storage: Cannot lock storage /tmp/hadoop-root/dfs/name. The directory is already locked.
12/05/21 06:14:01 ERROR namenode.NameNode: java.io.IOException: Cannot lock storage /tmp/hadoop-root/dfs/name. The directory is already locked.
        at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:510)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1087)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)

12/05/21 06:14:01 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at nn01/127.0.0.1

 

./hadoop namenode -format 命令是格式化命名空间，一定是在未启动  hadoop 服务的时候才能执行。出现这个错误提示是因为 hadoop 的服务是子运行状态。


hadoop格式化时，不可以启动namenode

建议检查是否存在该目录：/home/hadoop-1.2.1/hadoop_tmp/dfs/name/current。或者手动创建该目录、或者在该目录内创建和删除文件。如果都成功，理论上来讲应该不会出现以上问题。
 

Warning: $HADOOP_HOME is deprecated

# The Hadoop command script
#
# Environment Variables
#
# JAVA_HOME The java implementation to use. Overrides JAVA_HOME.
#
# HADOOP_CLASSPATH Extra Java CLASSPATH entries.
#
# HADOOP_USER_CLASSPATH_FIRST When defined, the HADOOP_CLASSPATH is
# added in the beginning of the global
# classpath. Can be defined, for example,
# by doing
# export HADOOP_USER_CLASSPATH_FIRST=true
#
# HADOOP_HEAPSIZE The maximum amount of heap to use, in MB.
# Default is 1000.
#
# HADOOP_OPTS Extra Java runtime options.
#
# HADOOP_NAMENODE_OPTS These options are added to HADOOP_OPTS
# HADOOP_CLIENT_OPTS when the respective command is run.
# HADOOP_{COMMAND}_OPTS etc HADOOP_JT_OPTS applies to JobTracker
# for e.g. HADOOP_CLIENT_OPTS applies to
# more than one command (fs, dfs, fsck,
# dfsadmin etc)
#
# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf.
#
# HADOOP_ROOT_LOGGER The root appender. Default is INFO,console
#

bin=`dirname "$0"`
bin=`cd "$bin"; pwd`

if [ "$HADOOP_HOME_WARN_SUPPRESS" == "" ] && [ "$HADOOP_HOME" != "" ]; then
echo "Warning: \$HADOOP_HOME is deprecated." 1>&2
echo 1&gt......余下全文>>
 

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