[JENA-898] Building w/tests on Windows requires a lot of disk space

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: Jena 2.12.1, Jena 2.13.0
• Component/s: TDB

Environment

Windows

• Assignee: Unassigned
• Reporter: Stian Soiland-Reyes (old) (Inactive)
• Created: 10/Mar/15 10:27
• Updated: 09/Feb/22 10:31
• Resolved: 09/Feb/22 10:31

Description

mvn clean install

on Windows, in particular of jena-tdb and jena-jdbc-driver-tdb requires a lot of disk space (> 40 GB) as temporary TDB datasets are created per test due to the memory mapped files on Windows not being released (JENA-775, JENA-115)

JENA-897 ensures those files are in target/ when running through Maven, so at least they are removed on mvn clean.

It might be possible to release the ByteBuffers that lock the memory regions using System.gc() (which might not help anyway) - but this adds significant overhead (~ 1s on my machine) – perhaps this could be done pr 10 tests in a @After if on Windows, as a kind of best-effort clean-up?

Issue Links

• relates to: JENA-897 jena-jdbc-tdb tests use %TEMP% instead of target/
• relates to: JENA-115 TxTDB tests fail on Windows
• relates to: JENA-775 Jena TDB doesn't seem to release all file handles when dataset is closed