diff --git a/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/TripleSourceIterationWrapper.java b/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/TripleSourceIterationWrapper.java
index 1a057dc595a..b588a055046 100644
--- a/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/TripleSourceIterationWrapper.java
+++ b/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/TripleSourceIterationWrapper.java
@@ -48,9 +48,6 @@ public boolean hasNext() throws QueryEvaluationException {
 		} catch (QueryEvaluationException e) {
 			throw e;
 		} catch (Exception e) {
-			if (e instanceof InterruptedException) {
-				Thread.currentThread().interrupt();
-			}
 			throw new QueryEvaluationException(e);
 		}
 	}
@@ -75,9 +72,6 @@ public T next() throws QueryEvaluationException {
 		} catch (IllegalStateException | QueryEvaluationException e) {
 			throw e;
 		} catch (Exception e) {
-			if (e instanceof InterruptedException) {
-				Thread.currentThread().interrupt();
-			}
 			throw new QueryEvaluationException(e);
 		}
 	}
diff --git a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbRecordIterator.java b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbRecordIterator.java
index dbdb69479f7..896df84de25 100644
--- a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbRecordIterator.java
+++ b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbRecordIterator.java
@@ -26,18 +26,20 @@
 import java.nio.ByteBuffer;
 import java.util.concurrent.locks.StampedLock;
 
-import org.eclipse.rdf4j.sail.SailException;
 import org.eclipse.rdf4j.sail.lmdb.TripleStore.TripleIndex;
 import org.eclipse.rdf4j.sail.lmdb.TxnManager.Txn;
 import org.eclipse.rdf4j.sail.lmdb.Varint.GroupMatcher;
 import org.lwjgl.PointerBuffer;
 import org.lwjgl.system.MemoryStack;
 import org.lwjgl.util.lmdb.MDBVal;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * A record iterator that wraps a native LMDB iterator.
  */
 class LmdbRecordIterator implements RecordIterator {
+	private static final Logger log = LoggerFactory.getLogger(LmdbRecordIterator.class);
 	private final Pool pool;
 
 	private final TripleIndex index;
@@ -126,6 +128,11 @@ class LmdbRecordIterator implements RecordIterator {
 	public long[] next() {
 		long stamp = txnLock.readLock();
 		try {
+			if (closed) {
+				log.debug("Calling next() on an LmdbRecordIterator that is already closed, returning null");
+				return null;
+			}
+
 			if (txnRefVersion != txnRef.version()) {
 				// cursor must be renewed
 				mdb_cursor_renew(txn, cursor);
diff --git a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbUtil.java b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbUtil.java
index 9a2c68f7083..25459309f3c 100644
--- a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbUtil.java
+++ b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbUtil.java
@@ -16,7 +16,6 @@
 
 import static org.lwjgl.system.MemoryStack.stackPush;
 import static org.lwjgl.system.MemoryUtil.NULL;
-import static org.lwjgl.util.lmdb.LMDB.MDB_DBS_FULL;
 import static org.lwjgl.util.lmdb.LMDB.MDB_KEYEXIST;
 import static org.lwjgl.util.lmdb.LMDB.MDB_NOTFOUND;
 import static org.lwjgl.util.lmdb.LMDB.MDB_RDONLY;
@@ -32,7 +31,6 @@
 import java.nio.ByteBuffer;
 import java.nio.IntBuffer;
 import java.util.Comparator;
-import java.util.concurrent.ConcurrentHashMap;
 
 import org.lwjgl.PointerBuffer;
 import org.lwjgl.system.MemoryStack;
diff --git a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/TxnRecordCache.java b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/TxnRecordCache.java
index 73dff3fb1a8..9974f6a2df2 100644
--- a/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/TxnRecordCache.java
+++ b/core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/TxnRecordCache.java
@@ -45,7 +45,6 @@
 import java.nio.file.Path;
 
 import org.apache.commons.io.FileUtils;
-import org.eclipse.rdf4j.sail.SailException;
 import org.lwjgl.PointerBuffer;
 import org.lwjgl.system.MemoryStack;
 import org.lwjgl.util.lmdb.MDBStat;
diff --git a/core/sail/lmdb/src/test/java/org/eclipse/rdf4j/sail/lmdb/benchmark/QueryBenchmark.java b/core/sail/lmdb/src/test/java/org/eclipse/rdf4j/sail/lmdb/benchmark/QueryBenchmark.java
index 1f9f3311d40..504b9cd3b5c 100644
--- a/core/sail/lmdb/src/test/java/org/eclipse/rdf4j/sail/lmdb/benchmark/QueryBenchmark.java
+++ b/core/sail/lmdb/src/test/java/org/eclipse/rdf4j/sail/lmdb/benchmark/QueryBenchmark.java
@@ -112,7 +112,7 @@ public class QueryBenchmark {
 
 	public static void main(String[] args) throws RunnerException {
 		Options opt = new OptionsBuilder()
-				.include("QueryBenchmark") // adapt to run other benchmark tests
+				.include("QueryBenchmark.*") // adapt to run other benchmark tests
 				.forks(1)
 				.build();