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https://issues.apache.org/jira/browse/ACCUMULO-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13485755#comment-13485755
]
Dave Marion commented on ACCUMULO-708:
--------------------------------------
Steps I used to test locally:
{noformat}
mvn clean package -P assemble
tar zxf <distro> -C $ACCUMULO_HOME
hadoop fs -rmr /accumulo/classpath
hadoop fs -mkdir /accumulo/classpath
hadoop fs -moveFromLocal $ACCUMULO_HOME/lib/* /accumulo/classpath
hadoop fs -copyToLocal /accumulo/classpath/commons-vfs2-2.0.jar
$ACCUMULO_HOME/lib/.
hadoop fs -rmr /accumulo/classpath/commons-vfs2-2.0.jar
hadoop fs -copyToLocal /accumulo/classpath/accumulo-start-1.5.0-SNAPSHOT.jar
$ACCUMULO_HOME/lib/.
hadoop fs -rmr /accumulo/classpath/accumulo-start-1.5.0-SNAPSHOT.jar
#
# You will need to copy the following jar out of HDFS also if you plan to run
the old classloader.
#
hadoop fs -copyToLocal /accumulo/classpath/commons-jci-fam-1.0.jar
$ACCUMULO_HOME/lib/.
hadoop fs -rmr /accumulo/classpath/commons-jci-fam-1.0.jar
cp $ACCUMULO_HOME/conf/examples/512MB/native-standalone/* $ACCUMULO_HOME/conf/.
$ACCUMULO_HOME/bin/accumulo classpath
# Add to accumulo-site.xml
<!-- VFS ClassLoader Settings -->
<property>
<name>classloader.vfs.enabled</name>
<value>true</value>
<description>set to true to enable the vfs classloader. If not
enabled (default=false), then the old classloader is used</description>
</property>
$ACCUMULO_HOME/bin/accumulo classpath
#Then, add the default context classpath
<property>
<name>classloader.vfs.context.classpath.system</name>
<value>hdfs://localhost:8020/accumulo/classpath</value>
<description>location of the jars for the default (system)
context</description>
</property>
$ACCUMULO_HOME/bin/accumulo classpath
{noformat}
> Modify ClassLoader to support different applications / multi-tenancy
> --------------------------------------------------------------------
>
> Key: ACCUMULO-708
> URL: https://issues.apache.org/jira/browse/ACCUMULO-708
> Project: Accumulo
> Issue Type: Improvement
> Components: start
> Reporter: Dave Marion
> Assignee: Dave Marion
> Labels: classloader
> Fix For: 1.5.0
>
> Attachments: ACCUMULO-708-1.patch
>
> Original Estimate: 24h
> Time Spent: 33h
> Remaining Estimate: 0h
>
> I'd like to expand the current classloader to support loading classes from
> HDFS and different application contexts. I'll be modifying the ticket as the
> idea matures.
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