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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-3184) Hadoop: HADOOP_HOME should not be required if all other environment variables are set.
Date Mon, 23 May 2016 14:32:13 GMT
Vladimir Ozerov created IGNITE-3184:
---------------------------------------

             Summary: Hadoop: HADOOP_HOME should not be required if all other environment
variables are set.
                 Key: IGNITE-3184
                 URL: https://issues.apache.org/jira/browse/IGNITE-3184
             Project: Ignite
          Issue Type: Bug
          Components: hadoop
    Affects Versions: 1.5.0.final
            Reporter: Vladimir Ozerov
            Assignee: Ivan Veselovsky
             Fix For: 1.7


*Problem*
Ignite internals require three pieces to create correct Hadoop classpath:
1) Path to common JARs;
2) Path to HDFS JARs;
3) Path map-reduce JARs.

These three paths could be set with environment variables HADOOP_COMMON_HOME, HADOOP_HDFS_HOME
and HADOOP_MAPRED_HOME respectively. 

When all of them are set, HADOOP_HOME is no longer needed, but we will throw an exception
in this case. We should not do that.

*Solution*
Throw exception only in case we cannot resolve any of these paths.



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