当时，hadoop已经安装成功，但是secondarynamenode没有启动
后来经过研究，原来是配置的目录有问题
首先修改一下shell文件
文件路径：/home/work/hadoop/bin
原来：master 现在：secondarynamenode
[work@master bin]$ cat start-dfs.sh
#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Start hadoop dfs daemons.
# Optinally upgrade or rollback dfs state.
# Run this on master node.
usage="Usage: start-dfs.sh [-upgrade|-rollback]"
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
if [ -e "$bin/../libexec/hadoop-config.sh" ]; then
. "$bin"/../libexec/hadoop-config.sh
else
. "$bin/hadoop-config.sh"
fi
# get arguments
if [ $# -ge 1 ]; then
nameStartOpt=$1
shift
case $nameStartOpt in
(-upgrade)
;;
(-rollback)
dataStartOpt=$nameStartOpt
;;
(*)
echo $usage
exit 1
;;
esac
fi
# start dfs daemons
# start namenode after datanodes, to minimize time namenode is up w/o data
# note: datanodes will log connection errors until namenode starts
"$bin"/hadoop-daemon.sh --config $HADOOP_CONF_DIR start namenode $nameStartOpt
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR start datanode $dataStartOpt
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts
secondarynamenode start secondarynamenode
[work@master bin]$
停止的shell文件也要修改：
原来：master 现在：secondarynamenode
[work@master bin]$ cat start-dfs.sh
#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Start hadoop dfs daemons.
# Optinally upgrade or rollback dfs state.
# Run this on master node.
usage="Usage: start-dfs.sh [-upgrade|-rollback]"
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
if [ -e "$bin/../libexec/hadoop-config.sh" ]; then
. "$bin"/../libexec/hadoop-config.sh
else
. "$bin/hadoop-config.sh"
fi
# get arguments
if [ $# -ge 1 ]; then
nameStartOpt=$1
shift
case $nameStartOpt in
(-upgrade)
;;
(-rollback)
dataStartOpt=$nameStartOpt
;;
(*)
echo $usage
exit 1
;;
esac
fi
# start dfs daemons
# start namenode after datanodes, to minimize time namenode is up w/o data
# note: datanodes will log connection errors until namenode starts
"$bin"/hadoop-daemon.sh --config $HADOOP_CONF_DIR start namenode $nameStartOpt
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR start datanode $dataStartOpt
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts secondarynamenode start secondarynamenode
[work@master bin]$ cat stop-dfs.sh
#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Stop hadoop DFS daemons. Run this on master node.
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
if [ -e "$bin/../libexec/hadoop-config.sh" ]; then
. "$bin"/../libexec/hadoop-config.sh
else
. "$bin/hadoop-config.sh"
fi
"$bin"/hadoop-daemon.sh --config $HADOOP_CONF_DIR stop namenode
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR stop datanode
"$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts
secondarynamenode stop secondarynamenode
[work@master bin]$
第二点修改文件内容
文件路径：/home/work/hadoop/conf
从节点原来是：slaves里面有node1节点
修改后为只有node2和node3.
[work@master conf]$ cat slaves
node2
node3
[work@master conf]$
另外在追加一个secondarynamenode文件
里面单独放node1
[work@master conf]$ cat secondarynamenode
node1
[work@master conf]$
到此位置：secondarynamenode配置成功。
现在我把成功后运行的结果状态贴一下：
首先我是1个master，secondarynamenode是node1, node2和node3是datanode。
master情况：
[work@master conf]$ jps
13338 NameNode
13884 Jps
13554 JobTracker
[work@master conf]$
node1情况：
[work@node1 ~]$ jps
9772 SecondaryNameNode
10071 Jps
[work@node1 ~]$
node2情况：
[work@node2 ~]$ jps
22897 TaskTracker
22767 DataNode
23234 Jps
[work@node2 ~]$
node3情况：
[work@node3 ~]$ jps
3457 TaskTracker
3327 DataNode
3806 Jps
[work@node3 ~]$
hadoop中secondarynamenode节点添加方法
原文地址：http://blog.csdn.net/lzq123_1/article/details/41866461
