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From Arun C Murthy <...@yahoo-inc.com>
Subject Re: Problem with LibHDFS
Date Fri, 22 Feb 2008 17:36:29 GMT

On Feb 21, 2008, at 3:29 AM, Raghavendra K wrote:

> Hi,
>   I am able to get Hadoop running and also able to compile the  
> libhdfs.
> But when I run the hdfs_test program it is giving Segmentation Fault.

Unfortunately the documentation for using libhdfs is sparse, our  
apologies.

You'll need to set the CLASSPATH to include your hadoop-core.jar and  
the conf/ directory to run libhdfs since it is a JNI wrapper over the  
HDFS java api.

Please take a look at the 'test-libhdfs' target in the top-level  
build.xml for hints on how to set them...

Arun

> Just a small program like this
> #include "hdfs.h"
> int main() {
> return(0);
> }
> and compiled using the command
> gcc -ggdb -m32 -I/garl/garl-alpha1/home1/raghu/Desktop/jre1.5.0_14/ 
> include
> -I/garl/garl-alpha1/home1/raghu/Desktop/jre1.5.0_14/include/  
> hdfs_test.c
> -L/garl/garl-alpha1/home1/raghu/Desktop/hadoop-0.15.3/libhdfs -lhdfs
> -L/garl/garl-alpha1/home1/raghu/Desktop/jre1.5.0_14/lib/i386/server  
> -ljvm
> -shared -m32 -Wl,-x -o hdfs_test
> running hdfs_test gives segmentation fault.
> please tell me as to how to fix it.
>
>
>
> -- 
> Regards,
> Raghavendra K


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