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https://issues.apache.org/jira/browse/JENA-352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne updated JENA-352:
-------------------------------
Description:
The parsers need to keep a bNode label to bNode map which (unusual data) can
grow too large. As it takes unusual data, rated as "minor".
outline of solution:
1/ switch to a bNode allocation scheme which has a seed (a large random number
per parser run), and concat or XOR with the claimed bNode label to generate a
unique label without state build up.
2/ (Turtle) don't remember [] bnodes past their usage scope.
3/ Partial - keep a sliding window of bNodes label mappings
4/ Direct allocation for _:label and tracked allocation for []
e.g.
http://mail-archives.apache.org/mod_mbox/jena-users/201112.mbox/%[email protected]%3E
was:
The parsers need to keep a bNode label to bNode map which (unusual data) can
grow too large. As it takes unusual data, rated as "minor".
outline of solution:
1/ which to a bNode allocation scheme which is a large random number per file,
and concat or XOR with the claimed bNode label to generate a unique label
without state build up.
2/ (Turtle) don't remember [] bnodes past their usage scope.
3/ Partial - keep a sliding window of bNodes label mappings
4/ Direct allocation for _:label and tracked allocation for []
e.g.
http://mail-archives.apache.org/mod_mbox/jena-users/201112.mbox/%[email protected]%3E
> Vast numbers of bNodes can overwhelm the parser
> -----------------------------------------------
>
> Key: JENA-352
> URL: https://issues.apache.org/jira/browse/JENA-352
> Project: Apache Jena
> Issue Type: Bug
> Components: RIOT, TDB
> Reporter: Andy Seaborne
> Priority: Minor
>
> The parsers need to keep a bNode label to bNode map which (unusual data) can
> grow too large. As it takes unusual data, rated as "minor".
> outline of solution:
> 1/ switch to a bNode allocation scheme which has a seed (a large random
> number per parser run), and concat or XOR with the claimed bNode label to
> generate a unique label without state build up.
> 2/ (Turtle) don't remember [] bnodes past their usage scope.
> 3/ Partial - keep a sliding window of bNodes label mappings
> 4/ Direct allocation for _:label and tracked allocation for []
> e.g.
> http://mail-archives.apache.org/mod_mbox/jena-users/201112.mbox/%[email protected]%3E
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