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Posted to users@jena.apache.org by Abduladem Eljamel <a_...@yahoo.co.uk> on 2016/03/22 20:37:52 UTC
Error 500: No known block type for 0
Hi allI hope you are all fine.I have a TDB store contains a small data. When I query that data directly from JENA, I got results and it works fine. But when I use Fuseki server (1.0.2) to query the same data with the same SPARQL code, I got this error:
Error 500: No known block type for 0
The data contains two named graphs and the SPARQL query is:
SELECT * WHERE { GRAPH ?g { ?s ?p ?o}}
I would be very gratefull if any one tell me what is the cause of this error.
Thans in advance
Abdul
Re: Error 500: No known block type for 0
Posted by Abduladem Eljamel <a_...@yahoo.co.uk>.
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Thank you for answering my email.
Actually, I am using Jena transactionally with (begin-commit-end)
I noticed that the error realted to the graphs in the data store because whenI query the data targeting the default graph, there is no error even though with emptyresults.ThanksAbdul
________________________________
From: Andy Seaborne <an...@apache.org>
To: users@jena.apache.org
Sent: Wednesday, 23 March 2016, 17:38
Subject: Re: Error 500: No known block type for 0
On 22/03/16 19:37, Abduladem Eljamel wrote:
> Hi allI hope you are all fine.I have a TDB store contains a small data. When I query that data directly from JENA, I got results and it works fine. But when I use Fuseki server (1.0.2) to query the same data with the same SPARQL code, I got this error:
> Error 500: No known block type for 0
>
> The data contains two named graphs and the SPARQL query is:
>
> SELECT * WHERE { GRAPH ?g { ?s ?p ?o}}
>
> I would be very gratefull if any one tell me what is the cause of this error.
>
> Thans in advance
> Abdul
>
A possible cause is that you used non-transactionally in the past and
didn't flush changes to disk one time, or the app crashed.
The files on disk are in a bad state and you need to reload the data.
Fuseki always updates TDB transactionally if the service is acting
directly on TDB. Direct use from Jena can be transactionally
(begine-commit-end) or non-transactionally.
Andy
Re: Updated Information Related to this error "Error 500: No known
block type for 0"
Posted by Andy Seaborne <an...@apache.org>.
On 24/03/16 15:11, Abduladem Eljamel wrote:
> Hi,,This email is to update the information in previous email related to this error:"Error 500: No known block type for 0" I found that the TDB data store is corrupted after I useFuseki server to query it?After loading the store to Fuseki server and query it, Igot the message above even when use Jena API to query. If I don't use Fuseki, Ican still query the store with any problems. I am using Fusekei 1.0.2 with default settings. Thiscommand I use:fuseki-server --loc=myTDBLocation /myName ThanksAbdul
>
> From: Andy Seaborne <an...@apache.org>
> To: users@jena.apache.org
> Sent: Wednesday, 23 March 2016, 17:38
> Subject: Re: Error 500: No known block type for 0
>
> On 22/03/16 19:37, Abduladem Eljamel wrote:
>> Hi allI hope you are all fine.I have a TDB store contains a small data. When I query that data directly from JENA, I got results and it works fine. But when I use Fuseki server (1.0.2) to query the same data with the same SPARQL code, I got this error:
>> Error 500: No known block type for 0
>>
>> The data contains two named graphs and the SPARQL query is:
>>
>> SELECT * WHERE { GRAPH ?g { ?s ?p ?o}}
>>
>> I would be very gratefull if any one tell me what is the cause of this error.
>>
>> Thans in advance
>> Abdul
>>
>
> A possible cause is that you used non-transactionally in the past and
> didn't flush changes to disk one time, or the app crashed.
>
> The files on disk are in a bad state and you need to reload the data.
>
> Fuseki always updates TDB transactionally if the service is acting
> directly on TDB. Direct use from Jena can be transactionally
> (begine-commit-end) or non-transactionally.
>
> Andy
If the store is corrupted, it happened at sometime in the past. These
are silent errors that cause the messages like you are seeing only at
some later time.
I suggest you rebuild the database. Upgrading to the latest release
(Fuseki 1.3.1 or Fuseki 2.3.1, Jena 3.0.1) would be a good idea.
If you can reproducibly cause this error from a clean server, we might
be able to help but the information so far does not enable anyone to
reproduce the situation.
Andy
Updated Information Related to this error "Error 500: No known
block type for 0"
Posted by Abduladem Eljamel <a_...@yahoo.co.uk>.
Hi,,This email is to update the information in previous email related to this error:"Error 500: No known block type for 0" I found that the TDB data store is corrupted after I useFuseki server to query it?After loading the store to Fuseki server and query it, Igot the message above even when use Jena API to query. If I don't use Fuseki, Ican still query the store with any problems. I am using Fusekei 1.0.2 with default settings. Thiscommand I use:fuseki-server --loc=myTDBLocation /myName ThanksAbdul
From: Andy Seaborne <an...@apache.org>
To: users@jena.apache.org
Sent: Wednesday, 23 March 2016, 17:38
Subject: Re: Error 500: No known block type for 0
On 22/03/16 19:37, Abduladem Eljamel wrote:
> Hi allI hope you are all fine.I have a TDB store contains a small data. When I query that data directly from JENA, I got results and it works fine. But when I use Fuseki server (1.0.2) to query the same data with the same SPARQL code, I got this error:
> Error 500: No known block type for 0
>
> The data contains two named graphs and the SPARQL query is:
>
> SELECT * WHERE { GRAPH ?g { ?s ?p ?o}}
>
> I would be very gratefull if any one tell me what is the cause of this error.
>
> Thans in advance
> Abdul
>
A possible cause is that you used non-transactionally in the past and
didn't flush changes to disk one time, or the app crashed.
The files on disk are in a bad state and you need to reload the data.
Fuseki always updates TDB transactionally if the service is acting
directly on TDB. Direct use from Jena can be transactionally
(begine-commit-end) or non-transactionally.
Andy
Re: Error 500: No known block type for 0
Posted by Andy Seaborne <an...@apache.org>.
On 22/03/16 19:37, Abduladem Eljamel wrote:
> Hi allI hope you are all fine.I have a TDB store contains a small data. When I query that data directly from JENA, I got results and it works fine. But when I use Fuseki server (1.0.2) to query the same data with the same SPARQL code, I got this error:
> Error 500: No known block type for 0
>
> The data contains two named graphs and the SPARQL query is:
>
> SELECT * WHERE { GRAPH ?g { ?s ?p ?o}}
>
> I would be very gratefull if any one tell me what is the cause of this error.
>
> Thans in advance
> Abdul
>
A possible cause is that you used non-transactionally in the past and
didn't flush changes to disk one time, or the app crashed.
The files on disk are in a bad state and you need to reload the data.
Fuseki always updates TDB transactionally if the service is acting
directly on TDB. Direct use from Jena can be transactionally
(begine-commit-end) or non-transactionally.
Andy