[jira] [Created] (IMPALA-7161) Bootstrap's handling of JAVA_HOME needs improvement

["Joe McDonnell (JIRA)" <ji...@apache.org>]

Joe McDonnell created IMPALA-7161:
-------------------------------------

             Summary: Bootstrap's handling of JAVA_HOME needs improvement
                 Key: IMPALA-7161
                 URL: https://issues.apache.org/jira/browse/IMPALA-7161
             Project: IMPALA
          Issue Type: Bug
          Components: Infrastructure
    Affects Versions: Impala 2.13.0, Impala 3.1.0
            Reporter: Joe McDonnell


bin/bootstrap_system.sh installs the Java SDK and sets JAVA_HOME in the current shell. It also adds a command to the bin/impala-config-local.sh to export JAVA_HOME there. This doesn't do the job.

bin/impala-config.sh tests for JAVA_HOME at the very start of the script, before it has sourced bin/impala-config-local.sh. So, the user doesn't have a way of developing over the long term without manually setting up JAVA_HOME.

bin/impala-config.sh also doesn't detect the system JAVA_HOME. For Ubuntu 16.04, this is fairly simple and if a developer has their system JDK set up appropriately, it would make sense to use it. For example:

 
{noformat}
# If javac exists, then the system has a Java SDK (JRE does not have javac).
# Follow the symbolic links and use this to determine the system's JAVA_HOME.
if [ -L /usr/bin/javac ]; then
  SYSTEM_JAVA_HOME=$(readlink -f /usr/bin/javac | sed "s:bin/javac::")
fi

export JAVA_HOME="${JAVA_HOME:-${SYSTEM_JAVA_HOME}}"{noformat}
 



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