Hadoop Can not start namenode Unable to load native-hadoop library for your platform

0 votes

I am trying to run namenode using the following command:

./start-dfs.sh

But I am getting this error. 

05/012/18 11:03:21 WARN util.NativeCodeLoader: Unable to load
native-hadoop library for your platform... using builtin-java classes
where applicable Starting namenodes on [OpenJDK 64-Bit Server VM
warning: You have loaded library
/usr/local/hadoop/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'. localhost] sed: -e
expression #1, char 6: unknown option to `s' Server: ssh: Could not
resolve hostname Server: Name or service not known
-c: Unknown cipher type 'cd' stack: ssh: Could not resolve hostname stack: Name or service not known 64-Bit: ssh: Could not resolve
hostname 64-Bit: Name or service not known guard.: ssh: Could not
resolve hostname guard.: Name or service not known The: ssh: Could not
resolve hostname The: Name or service not known guard: ssh: Could not
resolve hostname guard: 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 will: ssh:
Could not resolve hostname will: Name or service not known the: ssh:
Could not resolve hostname the: Name or service not known fix: ssh:
Could not resolve hostname fix: Name or service not known VM: ssh:
Could not resolve hostname VM: Name or service not known You: ssh:
Could not resolve hostname You: Name or service not known which: ssh:
Could not resolve hostname which: Name or service not known It's: ssh:
Could not resolve hostname It's: Name or service not known disabled:
ssh: Could not resolve hostname disabled: Name or service not known
try: ssh: Could not resolve hostname try: Name or service not known
localhost: namenode running as process 4463. Stop it first. library:
ssh: Could not resolve hostname library: Name or service not known

Here is my .bashrc file:

export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"

How to solve this?

Dec 5, 2018 in Big Data Hadoop by digger
• 26,740 points
2,545 views

1 answer to this question.

0 votes

The entries in your .bashrc file looks fine. Try this, open your etc/hadoop/hadoop-env.sh and replace

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

with:

export HADOOP_OPTS="$HADOOP_OPTS -XX:-PrintWarnings -Djava.net.preferIPv4Stack=true"
answered Dec 5, 2018 by Omkar
• 69,230 points

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