Hi,
me and my coleagues are implementing a small search engine in my University
Laboratory,
and we would like to use Hadoop as file system.
For now we are having troubles in running the following simple code example:
================================================
#include "hdfs.h"
int main(int argc, char **argv) {
hdfsFS fs = hdfsConnect("apolo.latin.dcc.ufmg.br", 51070);
if(!fs) {
fprintf(stderr, "Oops! Failed to connect to hdfs!\n");
exit(-1);
}
int result = hdfsDisconnect(fs);
if(!result) {
fprintf(stderr, "Oops! Failed to connect to hdfs!\n");
exit(-1);
}
}
================================================
The error msg is:
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/conf/Configuration
================================================
We configured the following enviroment variables:
export JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun-1.5.0.13
export OS_NAME=linux
export OS_ARCH=i386
export LIBHDFS_BUILD_DIR=/mnt/hd1/hadoop/hadoop-0.14.4/libhdfs
export SHLIB_VERSION=1
export HADOOP_HOME=/mnt/hd1/hadoop/hadoop-0.14.4
export HADOOP_CONF_DIR=/mnt/hd1/hadoop/hadoop-0.14.4/conf
export HADOOP_LOG_DIR=/mnt/hd1/hadoop/hadoop-0.14.4/logs
The following commands were used to compile the codes:
In directory: hadoop-0.14.4/src/c++/libhdfs
1 - make all
2 - gcc -I/usr/lib/jvm/java-1.5.0-sun-1.5.0.13/include/ -c my_hdfs_test.c
3 - gcc my_hdfs_test.o -I/usr/lib/jvm/java-1.5.0-sun-1.5.0.13/include/
-L/mnt/hd1/hadoop/hadoop-0.14.4/libhdfs -lhdfs
-L/usr/lib/jvm/java-1.5.0-sun-1.5.0.13/jre/lib/i386/server -ljvm -o
my_hdfs_test
Obs:
The hadoop file system seems to be ok once we can run commands like this:
[EMAIL PROTECTED]:/mnt/hd1/hadoop/hadoop-0.14.4$ bin/hadoop dfs -ls
Found 0 items
--
[]s
Anisio Mendes Lacerda
