11 Nisan 2015 Cumartesi

Hadoop Sorun Çözme - Troubleshooting

Hadoop Troubleshooting

Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to localhost/127.0.0.1:8020.

This error happens when Hadoop doesn't terminated properly. Solution is very simple.Just delete files under /tmp folder which is related with Hadoop

SSH Error

When CenOS cannot read SSH folder,you may experience these errors. When using Ubuntu, I didn't experience any SSH related errors. I followed the following process:http://ubuntuforums.org/showthread.php?t=1932058

localhost: Error: JAVA_HOME is not set and could not be found

When JAVA_HOME is not set,you see this error. You need to add JDK folder to hadoop-env.sh file.

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