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commit 922af08ceb34048a6464e80270806feee04efb74 Author: Andy Seaborne <[email protected]> AuthorDate: Wed Jun 4 18:40:46 2025 +0100 GH-3240: Explicit after releasing handled to MappedByteBuffer objects --- .../src/main/java/org/apache/jena/tdb2/sys/StoreConnection.java | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/jena-tdb2/src/main/java/org/apache/jena/tdb2/sys/StoreConnection.java b/jena-tdb2/src/main/java/org/apache/jena/tdb2/sys/StoreConnection.java index 89ff6053cf..98b2839900 100644 --- a/jena-tdb2/src/main/java/org/apache/jena/tdb2/sys/StoreConnection.java +++ b/jena-tdb2/src/main/java/org/apache/jena/tdb2/sys/StoreConnection.java @@ -148,6 +148,15 @@ public class StoreConnection sConn.lock.unlock(); ProcessFileLock.release(sConn.lock); } + // https://bugs.openjdk.org/browse/JDK-4724038 + // Release of memory mapped files. + // + // This can help with memory mapped buffers but this is not a guarantee. + // TDB2 does not hand out the MappedByBuffer the reference and + // closing nulls the references. The GC usually causes the clearup. + // + // This does not fix the MS-Windows specific issue. + Runtime.getRuntime().gc(); } /** Create or fetch a {@link ProcessFileLock} for a Location */
