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The "WritingYarnApps" page has been changed by ChrisRiccomini: http://wiki.apache.org/hadoop/WritingYarnApps?action=diff&rev1=9&rev2=10 This is actually going to be improved. It will likely become environment variables, or substituted variables (like the fail count). For more details, track this ticket: https://issues.apache.org/jira/browse/MAPREDUCE-3055 + '''My application master is failing, now what?''' + + You can debug the application master by running it directly (instead of the multi-step client job submission approach). The only thing to note is you will need to comment out the code that does the app master's registration to the resource manager and likely use a different fail count on each run to generate a different attempt id. + === Useful Links === * https://issues.apache.org/jira/secure/attachment/12486023/MapReduce_NextGen_Architecture.pdf
