hadoop启动时,报ssh: Could not resolve hostname xxx: Name or service not known
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hadoop启动时,报ssh: Could not resolve hostname xxx: Name or service not known
A__17 发表于4个月前
hadoop启动时,报ssh: Could not resolve hostname xxx: Name or service not known
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1)问题:

hadoop启动时,报ssh: Could not resolve hostname xxx: Name or service not known

2)错误信息:

[root[@master](https://my.oschina.net/u/48054) hadoop-2.2.0]# sbin/start-dfs.sh 
17/08/06 13:08:59 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /data/cloud/hadoop/hadoop-2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
master]
sed: -e expression #1, char 6: unknown option to `s'
library: ssh: Could not resolve hostname library: Name or service not known
loaded: ssh: Could not resolve hostname loaded: Name or service not known
VM: ssh: Could not resolve hostname VM: Name or service not known
have: ssh: Could not resolve hostname have: Name or service not known
Server: ssh: Could not resolve hostname Server: Name or service not known
64-Bit: ssh: Could not resolve hostname 64-Bit: Name or service not known
have: ssh: Could not resolve hostname have: Name or service not known
disabled: ssh: Could not resolve hostname disabled: Name or service not known
VM: ssh: Could not resolve hostname VM: Name or service not known
to: ssh: Could not resolve hostname to: No address associated with hostname
Java: ssh: Could not resolve hostname Java: No address associated with hostname
which: ssh: Could not resolve hostname which: Name or service not known
will: ssh: Could not resolve hostname will: Name or service not known
might: ssh: Could not resolve hostname might: Name or service not known
stack: ssh: Could not resolve hostname stack: Name or service not known
The: ssh: Could not resolve hostname The: Name or service not known
stack: ssh: Could not resolve hostname stack: Name or service not known
guard.: ssh: Could not resolve hostname guard.: Name or service not known
recommended: ssh: Could not resolve hostname recommended: Name or service not known
guard: ssh: Could not resolve hostname guard: Name or service not known
try: ssh: Could not resolve hostname try: Name or service not known
fix: ssh: Could not resolve hostname fix: Name or service not known
-c: Unknown cipher type 'cd'
fix: ssh: Could not resolve hostname fix: Name or service not known
the: ssh: Could not resolve hostname the: Name or service not known
the: ssh: Could not resolve hostname the: Name or service not known
with: ssh: Could not resolve hostname with: Name or service not known
it: ssh: Could not resolve hostname it: No address associated with hostname
with: ssh: Could not resolve hostname with: Name or service not known
or: ssh: Could not resolve hostname or: Name or service not known
The authenticity of host 'master (192.168.1.110)' can't be established.
RSA key fingerprint is db:8e:ce:15:18:ad:9d:16:0e:88:98:0d:da:06:e4:18.
Are you sure you want to continue connecting (yes/no)? that: ssh: Could not resolve hostname that: Name or service not known
highly: ssh: Could not resolve hostname highly: Name or service not known
library: ssh: Could not resolve hostname library: Name or service not known
now.: ssh: Could not resolve hostname now.: No address associated with hostname
You: ssh: Could not resolve hostname You: No address associated with hostname
you: ssh: Could not resolve hostname you: No address associated with hostname
link: ssh: Could not resolve hostname link: No address associated with hostname
HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Temporary failure in name resolution
warning:: ssh: Could not resolve hostname warning:: Temporary failure in name resolution
It's: ssh: Could not resolve hostname It's: Temporary failure in name resolution
<libfile>',: ssh: Could not resolve hostname <libfile>',: Temporary failure in name resolution
'execstack: ssh: Could not resolve hostname 'execstack: Temporary failure in name resolution
'-z: ssh: Could not resolve hostname '-z: Temporary failure in name resolution
noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Temporary failure in name resolution

3)解决方法:

在/etc/profile文件中添加:
	export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
	export HADOOP_OPTS=-Djava.library.path=$HADOOP_HOME/lib
	
注意:是export HADOOP_OPTS=-Djava.library.path=$HADOOP_HOME/lib,而不是export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"
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