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MapReduce, mail # dev - Re-swizzle 2.3


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Re: Re-swizzle 2.3
Steve Loughran 2014-02-07, 18:14
On 6 February 2014 17:07, Alejandro Abdelnur <[EMAIL PROTECTED]> wrote:

-1 to that; if there are issues we should be able to find and fix them soon
enough. Even if you aren't doing long-lived YARN services yet, even llama
benefits from this zero-container-loss on AM restart.

We do have Hoya using this (introspection code because the protobuf
structures are hidden away), means that you can kill the AM and HBase &
Accumulo clusters stay up in their YARN containers, the restarted AM gets
that list of containers (and any pending events), rebuilds its data
structures and carries on as before. Sweet!

https://github.com/hortonworks/hoya/blob/develop/hoya-core/src/main/java/org/apache/hoya/yarn/appmaster/HoyaAppMaster.java#L551

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