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https://issues.apache.org/jira/browse/YARN-7190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16184806#comment-16184806
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Varun Saxena commented on YARN-7190:
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I haven't cleaned up findbugs-annotations and another unnecessary jar above.
The result above was merely to show possible segregation scheme. These jars are
brought in as a hbase dependency.
I think breaking it up into server and client jars should be done across
modules, not just YARN. I was finding it weird to create a folder like
{{share/hadoop/yarn/server}} and place only the YARN timelineservice specific
jars there and not the RM,NM ones. And if we place RM, NM jars there it would
break compatibility. So went with scheme above.
One suggestion from Vrushali during our weekly call was that we can place
timelineservice jar in share/hadoop/yarn/timelineservice folder and
timelineservice hbase implementation jars in
share/hadoop/yarn/timelineservice-hbase folders. However, latter may make only
sense if we can based on timeline writer/reader implementation exclude this
from NM/RM/reader classpath. Not sure if this would be feasible.
The first suggestion sounds good to me. So now, I plan to create a folder
{{share/hadoop/yarn/timelineservice}} and
{{share/hadoop/yarn/timelineservice/lib}} to place timeline service specific
jars and their dependencies.
Old jars would remain as it is in their respective locations.
Thoughts?
> Ensure only NM classpath in 2.x gets TSv2 related hbase jars, not the user
> classpath
> ------------------------------------------------------------------------------------
>
> Key: YARN-7190
> URL: https://issues.apache.org/jira/browse/YARN-7190
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineclient, timelinereader, timelineserver
> Reporter: Vrushali C
> Assignee: Varun Saxena
>
> [~jlowe] had a good observation about the user classpath getting extra jars
> in hadoop 2.x brought in with TSv2. If users start picking up Hadoop 2,x's
> version of HBase jars instead of the ones they shipped with their job, it
> could be a problem.
> So when TSv2 is to be used in 2,x, the hbase related jars should come into
> only the NM classpath not the user classpath.
> Here is a list of some jars
> {code}
> commons-csv-1.0.jar
> commons-el-1.0.jar
> commons-httpclient-3.1.jar
> disruptor-3.3.0.jar
> findbugs-annotations-1.3.9-1.jar
> hbase-annotations-1.2.6.jar
> hbase-client-1.2.6.jar
> hbase-common-1.2.6.jar
> hbase-hadoop2-compat-1.2.6.jar
> hbase-hadoop-compat-1.2.6.jar
> hbase-prefix-tree-1.2.6.jar
> hbase-procedure-1.2.6.jar
> hbase-protocol-1.2.6.jar
> hbase-server-1.2.6.jar
> htrace-core-3.1.0-incubating.jar
> jamon-runtime-2.4.1.jar
> jasper-compiler-5.5.23.jar
> jasper-runtime-5.5.23.jar
> jcodings-1.0.8.jar
> joni-2.1.2.jar
> jsp-2.1-6.1.14.jar
> jsp-api-2.1-6.1.14.jar
> jsr311-api-1.1.1.jar
> metrics-core-2.2.0.jar
> servlet-api-2.5-6.1.14.jar
> {code}
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