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From "Damian Steer (JIRA)" <>
Subject [jira] [Created] (JENA-101) Memory leak in Fuseki
Date Mon, 15 Aug 2011 22:55:27 GMT
Memory leak in Fuseki

                 Key: JENA-101
             Project: Jena
          Issue Type: Bug
          Components: Fuseki
            Reporter: Damian Steer
            Priority: Minor

Steps to reproduce:

1. Start fuseki in memory mode with updates enabled.
2. Repeatedly PUT an N-Triple or turtle file to the same graph.
3. Attach VisualVM.
4. Memory use slowly grows and is not all collected.


The parser uses the sink SinkTriplesToGraph, which registers itself with the global RIOT event
manager. The sink is never closed by fuseki, and so is never unregistered, which means the
sink remains reachable. The sink also has a reference to the graph, so each added graph remains

Closing the sink seems to fix the issue. Not clear if this is especially a memory mode issue.

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