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https://issues.apache.org/jira/browse/JENA-1527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne updated JENA-1527:
--------------------------------
    Summary: GraphTDB caches prefix map across transactions.  (was: GraphDB 
caches prefix map across transactions.)

> GraphTDB caches prefix map across transactions.
> -----------------------------------------------
>
>                 Key: JENA-1527
>                 URL: https://issues.apache.org/jira/browse/JENA-1527
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: TDB
>    Affects Versions: Jena 3.7.0
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>            Priority: Major
>
> The pattern below causes transaction errors ("BlockMgrJournal not active") 
> because the pmap is carried from trasnaction1 to transaction 2 in the 
> GraphBase cache (member "pm").
> {noformat}
>     Graph g = dsg.getGraph(gn1);
>     Txn.executeWrite(dsg, ()->{
>         // Get, do not use. ** GraphBase caches **
>         PrefixMapping pmap = g.getPrefixMapping();
>     });
>     Txn.executeWrite(dsg, ()-> {
>         PrefixMapping pmap = g.getPrefixMapping();
>         pmap.setNsPrefix("x0", "http:/example/x0#");
>     });
> {noformat}



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