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From "Hayden Marchant (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2944) Generated configuration files and scripts assume SUN as JVM
Date Tue, 24 Jun 2014 07:12:24 GMT
Hayden Marchant created ACCUMULO-2944:
-----------------------------------------

             Summary: Generated configuration files and scripts assume SUN as JVM
                 Key: ACCUMULO-2944
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2944
             Project: Accumulo
          Issue Type: Sub-task
    Affects Versions: 1.6.0
         Environment: IBM JVM
            Reporter: Hayden Marchant
             Fix For: 1.6.1, 1.7.0


There are a few issues, detailed below:

 a. The generated configuration files contain references to GC 
params that are specific to Sun JVM. In accumulo-env.sh, the 
ACCUMULO_TSERVER_OPTS contains -XX:NewSize and -XX:MaxNewSize , and also in ACCUMULO_GENERAL_OPTS,
-XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 are used.

b. in bin/accumulo, get ClassNotFoundException due to 
specification of JAXP Doc Builder: 
-Djavax.xml.parsers.DocumentBuilderFactory=com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl

. 
        The Sun implementation of Document Builder Factory does not exists 
in IBM JDK, so a ClassNotFoundException is thrown on running accumulo 
script

c. MiniAccumuloCluster - in the MiniAccumuloClusterImpl, 
Sun-speciifc GC params are passed as params to the java process (similar 
to section a. )

Single proposal for solving all 3 issues:

Enhance bootstrap_config.sh with request to select Java vendor. 
Selecting this will set correct values for GC params (they differ between 
IBM and Sun), inclusion/ommision of JAXP setting. The 
MiniAccumuloClusterImpl can read the same env variable that was set in 
code for the GC Params, and use in the exec command.

For exampel, doing this will result in CMS settings existing for SUN JVM, but when using IBM
JVM, the relevant GC parameter for IBM JVM will be used instead. In addition, the SUN JAXP
implementation will be omitted on non-SUN JVM.

For now, I plan on having 4 options in new question

1. Sun
2. OpenJDK
3. IBM
4. Other




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