When does a submitted job start execution

[Joel Victor]

I am going through the Kylin code for when a build request is submitted. I
would like to know when the job starts execution i.e when is the execute
method called on the DeafultChainedExecutable returned by the JobBuilder?.
When a cube build request is made a DefaultChaninedExecutable is returned,
serialized and stored in HBase.


Thanks,
Joel