Tom den Braber created JENA-1586:
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Summary: Fuseki does not close files of dataset when the dataset
is removed
Key: JENA-1586
URL: https://issues.apache.org/jira/browse/JENA-1586
Project: Apache Jena
Issue Type: Bug
Components: Fuseki
Affects Versions: Jena 3.6.0
Environment: Debian 9.5 with Jena 3.6.0
Reporter: Tom den Braber
When you remove a TDB-dataset over HTTP from the Fuseki server, Fuseki does not
close the file.
Steps to reproduce:
First: create a dataset over HTTP with name 'x'. Then, delete the dataset with
name 'x'. Now inspect the open files of the fuseki process by running {{lsof -p
<FUSEKI_PROCESS_ID> }}you see that a dataset with name 'x' is still opened by
the Fuseki-process.
Impact:
When a Fuseki process runs for a long time, and many datasets are created and
deleted, it will in the end lead to a situation in which you cannot create new
datasets anymore. Each attempt to creating a dataset will lead to a HTTP
response code 500 with message 'java.nio.file.FileSystemException:
/var/lib/fuseki/templates/config-tdb: Too many open files'. Also, keeping the
files open leads (I suspect) to a higher memory usage than strictly needed.
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