Hadoop “Unable to load native-hadoop library for y

Question

I'm currently configuring hadoop on a server running CentOs. When I run start-dfs.sh or stop-dfs.sh, I get the following error:

WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

I'm running Hadoop 2.2.0.

Doing a search online brought up this link: http://balanceandbreath.blogspot.ca/2013/01/utilnativecodeloader-unable-to-load.html

However, the contents of /native/ directory on hadoop 2.x appear to be different so I am not sure what to do.

I've also added these two environment variables in hadoop-env.sh:

export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=/usr/local/hadoop/lib/"

export HADOOP_COMMON_LIB_NATIVE_DIR="/usr/local/hadoop/lib/native/"

Any ideas?

Answer 1

export HADOOP_HOME=/home/hadoop/hadoop-2.4.1  
export PATH=$HADOOP_HOME/bin:$PATH  
export HADOOP_PREFIX=$HADOOP_HOME  
export HADOOP_COMMON_HOME=$HADOOP_PREFIX  
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_PREFIX/lib/native  
export HADOOP_CONF_DIR=$HADOOP_PREFIX/etc/hadoop  
export HADOOP_HDFS_HOME=$HADOOP_PREFIX  
export HADOOP_MAPRED_HOME=$HADOOP_PREFIX  
export HADOOP_YARN_HOME=$HADOOP_PREFIX  
export JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/native:$JAVA_LIBRARY_PATH

Answer 2

Verified remedy from earlier postings:

1) Checked that the libhadoop.so.1.0.0 shipped with the Hadoop distribution was compiled for my machine architecture, which is x86_64:

[nova]:file /opt/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0
/opt/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=3a80422c78d708c9a1666c1a8edd23676ed77dbb, not stripped

2) Added -Djava.library.path=<path> to HADOOP_OPT in hadoop-env.sh:

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true -Djava.library.path=/opt/hadoop-2.6.0/lib/native"

This indeed made the annoying warning disappear.

Answer 3

In addition to @zhutoulala accepted answer, here is an update to make it work with latest stable version to date (2.8) on ARMHF platforms (Raspberry Pi 3 model B). First I can confirm that you must recompile native libraries to 64 bit ARM, other answers here based on setting some environment variables won't work. As indicated in Hadoop documentation, the pre-built native libraries are 32 bit.

High level steps given in the fist link (http://www.ercoppa.org/posts/how-to-compile-apache-hadoop-on-ubuntu-linux.html) are correct. On this url http://www.instructables.com/id/Native-Hadoop-260-Build-on-Pi/ you get more details specific to Raspberry Pi, but not for Hadoop version 2.8.

Here are my indications pour Hadoop 2.8 :

• there is still no protobuf package on latest Raspbian so you must compile it yourself and version must be exactly protobuf 2.5 (https://protobuf.googlecode.com/files/protobuf-2.5.0.tar.gz)

• CMake file patching method must be changed. Moreovere, files to patch are not the same. Unfortunately, there is no accepted patch on JIRA specific to 2.8. On this URL (https://issues.apache.org/jira/browse/HADOOP-9320) you must copy and paste Andreas Muttscheller proposed patch on your namenode :

  :hadoop-2.8.0-src/hadoop-common-project/hadoop-common $ touch HADOOP-9320-v2.8.patch
  :hadoop-2.8.0-src/hadoop-common-project/hadoop-common $ vim HADOOP-9320-v2.8.patch
  #copy and paste proposed patch given here : https://issues.apache.org/jira/browse/HADOOP-9320?focusedCommentId=16018862&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16018862
  :hadoop-2.8.0-src/hadoop-common-project/hadoop-common $ patch < HADOOP-9320-v2.8.patch
  patching file HadoopCommon.cmake
  patching file HadoopJNI.cmake
  :hadoop-2.8.0-src/hadoop-common-project/hadoop-common $ cd ../..
  :hadoop-2.8.0-src $ sudo mvn package -Pdist,native -DskipTests -Dtar
  

Once build is successful :

    :hadoop-2.8.0-src/hadoop-dist/target/hadoop-2.8.0/lib/native $ tar -cvf nativelibs.tar *

And replace the content of the lib/native directory of your Hadoop install with the content of this archive. Warning message when running Hadoop should disappear.

Answer 4

In my case , after I build hadoop on my 64 bit Linux mint OS, I replaced the native library in hadoop/lib. Still the problem persist. Then I figured out the hadoop pointing to hadoop/lib not to the hadoop/lib/native. So I just moved all content from native library to its parent. And the warning just gone.

Answer 5

Firstly: You can modify the glibc version.CentOS provides safe softwares tranditionally,it also means the version is old such as glibc,protobuf ...

ldd --version
ldd /opt/hadoop/lib/native/libhadoop.so.1.0.0

You can compare the version of current glibc with needed glibc.

Secondly: If the version of current glibc is old,you can update the glibc. DownLoad Glibc

If the version of current glibc id right,you can append word native to your HADOOP_OPTS

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

Answer 6

Just append word native to your HADOOP_OPTS like this:

export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$HADOOP_HOME/lib/native"

PS: Thank Searene