Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.
The "HadoopJavaVersions" page has been changed by SomeOtherAccount: http://wiki.apache.org/hadoop/HadoopJavaVersions?action=diff&rev1=18&rev2=19 1 - Hadoop works well with update 16 however there is a bug in JDK versions before update 19 that has been seen on HBase. See [[https://issues.apache.org/jira/browse/HBASE-4367|HBASE-4367]] for details. - 2 - If the grid is running in secure mode with MIT Kerberos 1.8 and higher, the Java version should be 1.6.0_27 or higher in order to avoid [[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6979329|Java bug 6979329]. + 2 - If the grid is running in secure mode with MIT Kerberos 1.8 and higher, the Java version should be 1.6.0_27 or higher in order to avoid [[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6979329|Java bug 6979329]]. The Sun JVM has 32-bit and 64-bit modes. In a large cluster the NameNode and JobTracker need to run in 64-bit mode to keep all their data structures in memory. The workers can be set up for either 32-bit or 64-bit operation, depending upon preferences and how much memory the individual tasks need.
