Can you explain the deadlock? Is it only if i have a cyclical trigger? Or is 
there something else?

Not trying to argue my constraint approach is a good idea. It it is a bad idea. 
 Just curious. 


> On Jul 23, 2014, at 4:54 PM, Josh Elser <[email protected]> wrote:
> 
> Constraints execute server-side.
> 
> It might work to write to an external system but it's still bogus for proper 
> lifecycle methods on cleanup inside Accumulo. Writing to Accumulo within a 
> constraint is still deadlock prone, as well.
> 
>> On 7/23/14, 4:51 PM, Donald Miner wrote:
>> We thought about this for text indexing. We found we could use Constraints 
>> as they trigger on write. Seems like a bit of a hack and i have no idea if 
>> it would blow something up.
>> 
>> Does constraint execution happen on tablet side or client side?
>> 
>>> On Jul 23, 2014, at 4:39 PM, Roshan Punnoose <[email protected]> wrote:
>>> 
>>> Is there a way to tie into the write process in Accumulo? Maybe just use an
>>> Iterator that worked on compaction to send data to blur/solr? I have seen
>>> something similar in Cassandra, a data hook to save data in Solr.
>>> 
>>> 
>>>> On Fri, Jul 18, 2014 at 6:46 PM, Nehal Mehta <[email protected]> wrote:
>>>> 
>>>> We were trying to do so, but adding visibility while adding/searching
>>>> documents needs lot more thinking. Adding visibility to core search engine
>>>> needs changes to algorithm and that does not make it very scalable.
>>>> Integration besides granular visibility is very doable. and we had taken
>>>> inspiration from Solandra.
>>>> 
>>>> Obviously if we can get it done it adds lot of value. I believe Sqrrl
>>>> people have already done it, are they thinking to open source it anytime in
>>>> future?
>>>> 
>>>> 
>>>> On Thu, Jul 17, 2014 at 3:09 PM, Donald Miner <[email protected]>
>>>> wrote:
>>>> 
>>>>> We briefly toyed with blur on accumulo but didnt get too far just because
>>>>> it was obe. I think that would be cool.
>>>>> 
>>>>>> On Jul 17, 2014, at 3:06 PM, Josh Elser <[email protected]> wrote:
>>>>>> 
>>>>>> It's definitely possible. I remember hearing about someone doing lucene
>>>>> on top of Accumulo once, but I don't recall seeing a nice package with a
>>>>> bow on top.
>>>>>> 
>>>>>>> On 7/17/14, 2:53 PM, THORMAN, ROBERT D wrote:
>>>>>>> What lexical search package (like lucene/solr) has anyone put on top
>>>> of
>>>>> accumulo?  Is this possible or does everyone just index log files and
>>>>> documents?
>>>>>>> 
>>>>>>> v/r
>>>>>>> Bob Thorman
>>>>>>> Principal Big Data Engineer
>>>>>>> AT&T Big Data CoE
>>>>>>> 2900 W. Plano Parkway
>>>>>>> Plano, TX 75075
>>>>>>> 972-658-1714
>>>> 

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