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From Eric Newton <eric.new...@gmail.com>
Subject Re: exception thrown during minor compaction
Date Tue, 01 Sep 2015 03:58:18 GMT
Sure, but not during a compaction that does not involve all the underlying
files. The delete keys must be propagated.

I'm not completely familiar with the underlying libraries that help you
write iterators, I just know it's a common mistake.


On Mon, Aug 31, 2015 at 11:53 PM, Josh Elser <josh.elser@gmail.com> wrote:

> Shouldn't the delete be masked at a lower layer (DeletingIterator)? Or am
> I forgetting that Combiners see that value somehow (and maybe
> SummingCombiner is broken)?
>
>
> Eric Newton wrote:
>
>> You may be seeing a delete marker.  In a compaction, you will see delete
>> markers, which have an empty value. You will have to check the delete flag
>> on the key before grabbing the Value.
>>
>> -Eric
>>
>> On Mon, Aug 31, 2015 at 8:28 PM, z11373<z11373@outlook.com>  wrote:
>>
>> Thanks Josh! I am going to do more experiments, because this is really
>>> weird.
>>> I'll post the update if there are any interesting stuff I found out
>>> later.
>>>
>>> Thanks,
>>> Z
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>>
>>> http://apache-accumulo.1065345.n5.nabble.com/exception-thrown-during-minor-compaction-tp15010p15017.html
>>> Sent from the Developers mailing list archive at Nabble.com.
>>>
>>>
>>

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