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HBase >> mail # user >> Rest Client remote connection


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Erman Pattuk 2012-10-14, 20:27
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Andrew Purtell 2012-10-14, 20:43
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Erman Pattuk 2012-10-14, 21:15
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Andrew Purtell 2012-10-14, 21:28
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Re: Rest Client remote connection
Thank you so much for your answers Andrew.

Erman
On 10/14/2012 4:28 PM, Andrew Purtell wrote:
> What REST does wrt. filters is pass through a filter specification from
> client to server. The filter API has been changing for each HBase major
> version so it hasn't made sense (yet) to make this a first class part of
> the REST representations, thus version independent. (Otherwise retired
> filter types would need be emulated.) Certainly an older server will not
> understand filters constructed by a newer client. In short, if you want to
> use filters for scans submitted through the REST interface the client and
> server versions should be the same.
>
> On Sunday, October 14, 2012, Erman Pattuk wrote:
>
>> With a more detailed investigation, I found out that the problem was about
>> setting a filter for the scan instance.
>>
>> In my application, I create FilterList and put a KeyOnlyFilter in it. Then
>> I use Scan::setFilter(Filter) method. If I remove this statement, then
>> there is no problem.
>>
>> Does Rest API support filters in Get and Scan? Maybe that is the problem.
>>
>> By the way, in the server logs, there was not a trace of a failed request
>> of some kind.
>>
>> On 10/14/2012 3:43 PM, Andrew Purtell wrote:
>>
>>> First, if you don't need mismatched client and server versions of HBase
>>> you'll do yourself a favor by avoiding that - just as a general
>>> suggestion.
>>>
>>> Next, a 400 response means your request was not properly formatted. We
>>> will
>>> need more information to understand why. What was the request as sent by
>>> the client? What is logged on the server side?
>>>
>>> On Sunday, October 14, 2012, Erman Pattuk wrote:
>>>
>>>   Hi,
>>>> I have yet another problem with HBase rest client/server thing. Through
>>>> Java Rest Client, if I call scan function, an IOException occurs, saying
>>>> "scan request failed with 400".
>>>>
>>>> Here is the situation:
>>>> I am running my application on my laptop, which has hbase 0.94.1. On the
>>>> other hand, cluster that I am connecting to has HBase 0.90.1. Before
>>>> starting Rest server on cluster, I had to copy jax, jackson (I don't
>>>> remember the names exactly :)) jars to master and slaves.
>>>> I can connect to cluster's Rest server from my laptop, I'm sure about
>>>> that. But, when I send a query (Put, Scan or any other), I get error code
>>>> 400.
>>>>
>>>> Do I have to update HBase on my cluster as well? Or can I solve the issue
>>>> without doing so?
>>>>
>>>> Thanks in advance.
>>>> Erman
>>>>
>>>>
>>