hadoop-hdfs-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Aji Janis <aji1...@gmail.com>
Subject Re: Adding external jar
Date Thu, 04 Apr 2013 20:17:14 GMT
I am not sure if my classpath is set up right. See:

*[hadoop@node]$ cat /opt/hadoop/conf/hadoop-env.sh | grep HADOOP_CLASSPATH*
export HADOOP_CLASSPATH=./:/conf:/build/*:

and the specific command I was trying to run was actually running a
mapreduce job on accumulo and was providing some accumulo libraries in the

*[hadoop@node]$ /opt/hadoop/bin/hadoop jar *
org.apache.accumulo.examples.simple.mapreduce.bulk.BulkIngestExample *
*-libjars *

Exception in thread "main" java.lang.NoClassDefFoundError:
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:264)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
Caused by: java.lang.ClassNotFoundException:
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        ... 3 more

But org/apache/accumulo/core/client/Instance exists in
*any clue whats going wrong here?

On Thu, Apr 4, 2013 at 3:57 PM, Dhruv <dhruv21@gmail.com> wrote:

> -libjar should work fine but you need to make sure that your jars are in
> the Hadoop client's classpath as well.
> Check HADOOP_CLASSPATH variable and see if it references your jars or not.
> If it doesn't, you can add "export HADOOP_CLASSPATH=/path/to/your/jar" in
> your conf/hadoop-env.sh file.
> On Thu, Apr 4, 2013 at 12:21 PM, Aji Janis <aji1705@gmail.com> wrote:
>> We are running (ancient) hadoop version 0.20.203 and when running the
>> following command
>> /opt/hadoop/bin/hadoop jar my.jar full.path.to.my.class.example -libjars
>> " /opt/../abc.jar, /opt/../xyz.jar"
>> it keeps throwing the error:
>> Exception in thread "main" java.lang.NoClassDefFoundError:
>> the class its complaining about exists is the .jar I am including in
>> -libjars. Does anyone know (or tell me how I can find) if 0.20.203 supports
>> -libjars ? or any pointers to how can debug this issue would be great.
>> Thankyou.

View raw message