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From Andrea Barbato <and.barb...@gmail.com>
Subject Hadoop C++ HDFS test running Exception
Date Mon, 13 Jan 2014 10:06:50 GMT
I'm working with Hadoop 2.2.0 and trying to run this *hdfs_test.cpp*
 application:

#include "hdfs.h"
int main(int argc, char **argv) {

    hdfsFS fs = hdfsConnect("default", 0);
    const char* writePath = "/tmp/testfile.txt";
    hdfsFile writeFile = hdfsOpenFile(fs, writePath, O_WRONLY|O_CREAT, 0, 0, 0);
    if(!writeFile) {
          fprintf(stderr, "Failed to open %s for writing!\n", writePath);
          exit(-1);
    }
    char* buffer = "Hello, World!";
    tSize num_written_bytes = hdfsWrite(fs, writeFile, (void*)buffer,
strlen(buffer)+1);
    if (hdfsFlush(fs, writeFile)) {
           fprintf(stderr, "Failed to 'flush' %s\n", writePath);
          exit(-1);
    }
   hdfsCloseFile(fs, writeFile);}

I compiled it but when I'm running it with *./hdfs_test* I have this:

loadFileSystems error:(unable to get stack trace for
java.lang.NoClassDefFoundError exception:
ExceptionUtils::getStackTrace error.)
hdfsBuilderConnect(forceNewInstance=0, nn=default, port=0,
kerbTicketCachePath=(NULL), userName=(NULL)) error:(unable to get
stack trace for java.lang.NoClassDefFoundError exception:
ExceptionUtils::getStackTrace error.)
hdfsOpenFile(/tmp/testfile.txt): constructNewObjectOfPath
error:(unable to get stack trace for java.lang.NoClassDefFoundError
exception: ExceptionUtils::getStackTrace error.)Failed to open
/tmp/testfile.txt for writing!

Maybe is a problem with the classpath. My $HADOOP_HOME is /usr/local/hadoop
and actually this is my *variable *CLASSPATH**:

echo $CLASSPATH/usr/local/hadoop/etc/hadoop:/usr/local/hadoop/share/hadoop/common/lib/*:/usr/local/hadoop/share/hadoop/common/*:/usr/local/hadoop/share/hadoop/hdfs:/usr/local/hadoop/share/hadoop/hdfs/lib/*:/usr/local/hadoop/share/hadoop/hdfs/*:/usr/local/hadoop/share/hadoop/yarn/lib/*:/usr/local/hadoop/share/hadoop/yarn/*:/usr/local/hadoop/share/hadoop/mapreduce/lib/*:/usr/local/hadoop/share/hadoop/mapreduce/*:/contrib/capacity-scheduler/*.jar


Any help is appreciated.. thanks

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