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https://issues.apache.org/jira/browse/BIGTOP-843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13581476#comment-13581476
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Konstantin Boudnik commented on BIGTOP-843:
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A lot of enterprises are running on jre6 and - from my time back in Sun JDK
project - will be doing this for years to come. That means that Hadoop and Co
will have to support at least {{-target=1.6}} and produce meaningful bytecode.
Hence, I would object using JDK7 as default at least until Oracle keep
producing crazy regressions like the recent one reported on the River dev list.
> It would be really cool if bigtop-detect-javahome were smarter and didn't
> pick a 32-bit JVM, or a 1.7 JVM set with default
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: BIGTOP-843
> URL: https://issues.apache.org/jira/browse/BIGTOP-843
> Project: Bigtop
> Issue Type: Improvement
> Components: General
> Affects Versions: 0.5.0
> Reporter: Robert Justice
> Assignee: Mark Grover
>
> I see more and more folks with whacked versions of java configured in
> /usr/java/default or /usr/lib/jvm/default-java that are pointing to 32-bit
> JVMs or are simply not even a 1.6 JVM. I was wondering if we could do a bit
> more intelligence in this script and run a java -version to rule out a 32-bit
> JVM or a 1.7 JDK? Or would that be too error prone?
> if [ -z "$JAVA_HOME" ]; then
> for candidate in \
> /usr/lib/jvm/java-6-sun \
> /usr/lib/jvm/java-1.6.0-sun-1.6.0.*/jre/ \
> /usr/lib/jvm/java-1.6.0-sun-1.6.0.* \
> /usr/lib/jvm/j2sdk1.6-oracle \
> /usr/lib/jvm/j2sdk1.6-oracle/jre \
> /usr/lib/j2sdk1.6-sun \
> /usr/java/jdk1.6* \
> /usr/java/jre1.6* \
> /Library/Java/Home \
> /usr/java/default \
> /usr/lib/jvm/default-java \
> /usr/lib/jvm/java-openjdk \
> /usr/lib/jvm/jre-openjdk \
> /usr/lib/jvm/java-1.6.0-openjdk-1.6.* \
> /usr/lib/jvm/jre-1.6.0-openjdk* ; do
> if [ -e $candidate/bin/java ]; then
> export JAVA_HOME=$candidate
> break
> fi
> done
> fi
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