After setting up Hortonworks Sandbox 2.1 and installing Hunk 6.2, why are Hunk jobs not getting finalized (YARN HDP 2.x)?

[hRun]

I recently set up a Hortonworks Sandbox 2.1 in VirtualBox and installed Hunk 6.2 for some lab testing.
As the heading already says, when I start a search, it won't finalize. Hunk tells me x of y events matched and then gets stuck.
I configured my provider according to what Hue and the yarn-site.xml told me and none of the previous questions referring to the same issue helped me.
My search.log gives me 2 errors, I don't understand:

 1. java.lang.RuntimeException: Parent search is done. Alive token file does not exist: /opt/hunk/var/run/splunk/dispatch/subsearch_1422460645.44_1422461000.3/alive.token
 2. java.lang.RuntimeException: Parent search is done. Found file: /opt/hunk/var/run/splunk/dispatch/1422460645.44/finalize

http://pastebin.com/Ys93VTYL

[rdagan_splunk · Accepted solution]

You maybe seeing the same memory issues we saw with this earlier version of Hortonworks sandbox:
http://answers.splunk.com/answers/113972/issue-with-hortonworks-yarn-sandbox-hdp-2-and-hunk.html

[hRun]

I already figured it out this morning, when suddenly a "OutOfMemory" exception appeared instead which was way more helpful. Allocating more memory by modifying yarn-site.xml and mapred-site.xml solved the problem.