Hadoop Error Exception in thread main java lang UnsupportedClassVersionError a

+1 vote
I installed JDK7, a simple hello word program gets compile but when I run this I got following exception. I checked java -version on command prompt, it shows Java version 1.4.2_03 but when I tried to install new java version. Can anyone help me with this?
Aug 5, 2019 in Big Data Hadoop by Trina
 • 1,874 views

2 answers to this question.

+1 vote

Hi,

Try sudo update-alternatives --config java from the command line to set the version of the JRE you want to use. This should fix it.

answered Aug 5, 2019 by Gitika
 • 65,770 points
+1 vote
The reason for this error is because of the wrong version on your side. Please note you should use uninstall JDK 1.7 and use JDK 1,8 and they try the example. That should solve the issue. Reply back with info that you were able to run it :)
answered Aug 6, 2019 by Venkita
 • 240 points

Related Questions In Big Data Hadoop

0 votes
1 answer

Exception in thread "main" java.lang.UnsupportedClassVersionError: has been compiled by a more recent version of the Java Runtime

Try removing the / before the input ...READ MORE

answered Aug 9, 2019 in Big Data Hadoop by Esha
 • 1,422 views
0 votes
2 answers

Exception in thread "main" java.lang.UnsupportedClassVersionError

Hi, keep in mind do not forget to ...READ MORE

answered Aug 5, 2019 in Big Data Hadoop by Rashi
 • 1,414 views
0 votes
1 answer

Exception in thread "main" java.lang.NoClassDefFoundError

As far I can make out from ...READ MORE

answered Aug 9, 2019 in Big Data Hadoop by Arpit
 • 2,443 views
0 votes
1 answer

Exception in thread "main" java.lang.RuntimeException: Hive metastore database is not initialized.

Hi@akhtar, In this scenario, first you check if ...READ MORE

answered Feb 5, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,629 views
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
 • 11,380 points • 11,035 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
 • 11,380 points • 2,544 views
+2 votes
11 answers

hadoop fs -put command?

Hi, You can create one directory in HDFS ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 108,866 views
–1 vote
1 answer

Hadoop dfs -ls command?

In your case there is no difference ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 4,618 views
0 votes
1 answer

Hadoop: Error: Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

Hey, The error seems you have not add ...READ MORE

answered Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,858 views
+1 vote
1 answer

Hello all! I try to install hadoop but I have a problem when trying to format data folder with command "hdfs namenode -format". Error: Could not find or load main class Username

Hey! The error seems like the problem is ...READ MORE

answered May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,098 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.