Hi Chris,

Appreciate your help, and sor= ry for the crossposting on both 'user' and 'yarn-dev'. =A0I= first posted on yarn-dev and didn't see anything. =A0I then thought I = might not be able to post on that list. =A0That's why I posted it again= on 'user'. =A0Should I post this kind of questions on 'yarn-de= v' or 'user'?

Right now, I cannot compile=A0hadoop-yarn-server= -resourcemanager=A0independently. =A0I have to use=A0

mvn package -Pdist = -DskipTests -Dtar

to compile the whol= e project. =A0What command is appropriate to this scenario?

<= /div>

Thanks,

oxhead

On Sat, Apr 13, 2013 at 12:41 AM, Chris Nauroth <cnauroth@hortonworks.com> wrote:

I don't have an answer to your exact que= stion, but I do have a different suggestion that prevents the need to do fr= equent rebuilds of the whole Hadoop source tree. =A0First, do a full build = of the distribution tar.gz. =A0Extract it and set up a custom hadoop-env.sh= for yourself. =A0Inside the hadoop-env.sh file, export the environment var= iables HADOOP_USER_CLASSPATH_FIRST=3Dtrue and HADOOP_CLASSPATH=3D any class= path that you want to prepend before the classes loaded from the distributi= on. =A0For example, this is what I have in mine right now, because I'm = mostly working on HDFS and NodeManager:

export HADOOP_USER_CLASSPATH_FIRST=3Dtrue
HAD= OOP_REPO=3D~/git/hadoop-common
export HADOOP_CLASSPATH=3D$HADOOP_= REPO/hadoop-common-project/hadoop-common/target/classes:$HADOOP_REPO/hadoop= -hdfs-project/hadoop-hdfs/target/classes:$HADOOP_REPO/hadoop-yarn-project/h= adoop-yarn/hadoop-yarn-common/target/classes:$HADOOP_REPO/hadoop-yarn-proje= ct/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/target/cla= sses

For your ResourceManager work, you could set up your HA= DOOP_CLASSPATH to point at your hadoop-yarn-server-resourcemanager/target/c= lasses directory. =A0Then, source (.) this hadoop-env.sh in any shell that = you're using to run hadoop commands. =A0The daemons will print their fu= ll classpath before launching, so you can check that to see if it worked.

With all of this in place, you can keep recompiling jus= t hadoop-yarn-server-resourcemanager whenever you make changes instead of t= he whole hadoop-common tree. =A0Does this help?

Thanks,
--Chris

On Fri, Apr 12, 2013 at 8:46 PM, Chin-Jung Hsu <oxhead.list@gmail.com> wrote:

I am implementin= g my own YARN scheduler under 2.0.3-alpha. =A0Is that possible to build onl= y the ResourceManager project, and then create a distribution tar.gz for th= e entire Hadoop project? =A0Right now, the compiling time takes me about 9 = minutes.=A0

Thanks,
oxhead

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