Native Libraries do not load if a different platform signature is returned from
org.apache.hadoop.util.PlatformName
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Key: HADOOP-6923
URL: https://issues.apache.org/jira/browse/HADOOP-6923
Project: Hadoop Common
Issue Type: Bug
Components: native
Affects Versions: 0.20.2, 0.20.1, 0.20.0
Environment: SLES 10, IBM Java 6, Apache Hadoop 0.20.x
Reporter: Stephen Watt
Fix For: 0.20.3
The bin/hadoop script has an environment variable called JAVA_PLATFORM which is
set to to the results returned by org.apache.hadoop.util.PlatformName . These
results are sometimes unique to the JRE being used. Although the value returned
for 64 Bit Sun/Oracle Java and 64 Bit IBM Java is the same, it is different for
the corresponding 32 Bit JREs.
The issue is that the value returned is used in creating the path to the native
libraries on disk, i.e ${HADOOP_COMMON_HOME}/lib/native/${JAVA_PLATFORM}
Since the path on disk is fixed with the Sun JRE value
/lib/native/Linux-i386-32 it therefore fails when it attempts to load the
native libraries with the value returned with 32 Bit IBM Java,
/lib/native/Linux-x86-32
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