diff --git a/src/main/java/com/onthegomap/flatmap/reader/ShapefileReader.java b/src/main/java/com/onthegomap/flatmap/reader/ShapefileReader.java
index b31fb996..3158cb25 100644
--- a/src/main/java/com/onthegomap/flatmap/reader/ShapefileReader.java
+++ b/src/main/java/com/onthegomap/flatmap/reader/ShapefileReader.java
@@ -15,7 +15,6 @@ import java.util.zip.ZipFile;
 import org.geotools.data.FeatureSource;
 import org.geotools.data.shapefile.ShapefileDataStore;
 import org.geotools.feature.FeatureCollection;
-import org.geotools.feature.FeatureIterator;
 import org.geotools.geometry.jts.JTS;
 import org.geotools.referencing.CRS;
 import org.locationtech.jts.geom.Geometry;
@@ -29,7 +28,6 @@ import org.opengis.referencing.operation.MathTransform;
 public class ShapefileReader extends Reader implements Closeable {
 
   private final FeatureCollection<SimpleFeatureType, SimpleFeature> inputSource;
-  final FeatureIterator<SimpleFeature> featureIterator;
   private String[] attributeNames;
   private final ShapefileDataStore dataStore;
   private MathTransform transform;
@@ -66,7 +64,6 @@ public class ShapefileReader extends Reader implements Closeable {
       for (int i = 0; i < attributeNames.length; i++) {
         attributeNames[i] = inputSource.getSchema().getDescriptor(i).getLocalName();
       }
-      this.featureIterator = inputSource.features();
     } catch (IOException | FactoryException e) {
       throw new RuntimeException(e);
     }
@@ -113,20 +110,22 @@ public class ShapefileReader extends Reader implements Closeable {
   @Override
   public SourceStep<SourceFeature> read() {
     return next -> {
-      while (featureIterator.hasNext()) {
-        SimpleFeature feature = featureIterator.next();
-        Geometry source = (Geometry) feature.getDefaultGeometry();
-        Geometry transformed = source;
-        if (transform != null) {
-          transformed = JTS.transform(source, transform);
-        }
-        if (transformed != null) {
-          SourceFeature geom = new ReaderFeature(transformed);
-          // TODO
-          //          for (int i = 1; i < attributeNames.length; i++) {
-          //            geom.setTag(attributeNames[i], feature.getAttribute(i));
-          //          }
-          next.accept(geom);
+      try (var iter = inputSource.features()) {
+        while (iter.hasNext()) {
+          SimpleFeature feature = iter.next();
+          Geometry source = (Geometry) feature.getDefaultGeometry();
+          Geometry transformed = source;
+          if (transform != null) {
+            transformed = JTS.transform(source, transform);
+          }
+          if (transformed != null) {
+            SourceFeature geom = new ReaderFeature(transformed);
+            // TODO
+            //          for (int i = 1; i < attributeNames.length; i++) {
+            //            geom.setTag(attributeNames[i], feature.getAttribute(i));
+            //          }
+            next.accept(geom);
+          }
         }
       }
     };
@@ -134,7 +133,6 @@ public class ShapefileReader extends Reader implements Closeable {
 
   @Override
   public void close() {
-    featureIterator.close();
     dataStore.dispose();
   }
 }
diff --git a/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java b/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
index 8df4cff6..7d24002e 100644
--- a/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
+++ b/src/main/java/com/onthegomap/flatmap/worker/WorkQueue.java
@@ -1,11 +1,7 @@
 package com.onthegomap.flatmap.worker;
 
 import com.onthegomap.flatmap.monitoring.Stats;
-import java.io.Closeable;
-import java.io.IOException;
 import java.util.ArrayDeque;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Queue;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
@@ -15,7 +11,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
+public class WorkQueue<T> implements AutoCloseable, Supplier<T>, Consumer<T> {
 
   private final ThreadLocal<Queue<T>> itemWriteBatchProvider = new ThreadLocal<>();
   private final ThreadLocal<Queue<T>> itemReadBatchProvider = new ThreadLocal<>();
@@ -25,7 +21,6 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
   private final int pendingBatchesCapacity;
   private volatile boolean hasIncomingData = true;
   private final AtomicInteger pendingCount = new AtomicInteger(0);
-  private final List<Closeable> closeables = new ArrayList<>();
 
   public WorkQueue(String name, int capacity, int maxBatch, Stats stats) {
     this.pendingBatchesCapacity = capacity / maxBatch;
@@ -42,10 +37,7 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
         }
       }
       hasIncomingData = false;
-      for (Closeable closeable : closeables) {
-        closeable.close();
-      }
-    } catch (InterruptedException | IOException e) {
+    } catch (Exception e) {
       throw new RuntimeException(e);
     }
   }
@@ -123,9 +115,5 @@ public class WorkQueue<T> implements Closeable, Supplier<T>, Consumer<T> {
   public int getCapacity() {
     return pendingBatchesCapacity * batchSize;
   }
-
-  public void alsoClose(Closeable toClose) {
-    closeables.add(toClose);
-  }
 }
 
diff --git a/src/test/java/com/onthegomap/flatmap/reader/ShapefileReaderTest.java b/src/test/java/com/onthegomap/flatmap/reader/ShapefileReaderTest.java
index d0cdd0e3..17df1da9 100644
--- a/src/test/java/com/onthegomap/flatmap/reader/ShapefileReaderTest.java
+++ b/src/test/java/com/onthegomap/flatmap/reader/ShapefileReaderTest.java
@@ -31,21 +31,23 @@ public class ShapefileReaderTest {
 
   @Test
   @Timeout(30)
-  public void testReadShapefile() {
-    Map<String, Integer> counts = new TreeMap<>();
-    List<Geometry> points = new ArrayList<>();
-    Topology.start("test", new InMemory())
-      .fromGenerator("shapefile", reader.read())
-      .addBuffer("reader_queue", 100, 1)
-      .sinkToConsumer("counter", 1, elem -> {
-        String type = elem.getGeometry().getGeometryType();
-        counts.put(type, counts.getOrDefault(type, 0) + 1);
-        points.add(elem.getGeometry());
-      }).await();
-    assertEquals(86, points.size());
-    var gc = GeoUtils.gf.createGeometryCollection(points.toArray(new Geometry[0]));
-    var centroid = gc.getCentroid();
-    assertEquals(-77.0297995, centroid.getX(), 5);
-    assertEquals(38.9119684, centroid.getY(), 5);
+  public void testReadShapefileTwice() {
+    for (int i = 1; i <= 2; i++) {
+      Map<String, Integer> counts = new TreeMap<>();
+      List<Geometry> points = new ArrayList<>();
+      Topology.start("test", new InMemory())
+        .fromGenerator("shapefile", reader.read())
+        .addBuffer("reader_queue", 100, 1)
+        .sinkToConsumer("counter", 1, elem -> {
+          String type = elem.getGeometry().getGeometryType();
+          counts.put(type, counts.getOrDefault(type, 0) + 1);
+          points.add(elem.getGeometry());
+        }).await();
+      assertEquals(86, points.size());
+      var gc = GeoUtils.gf.createGeometryCollection(points.toArray(new Geometry[0]));
+      var centroid = gc.getCentroid();
+      assertEquals(-77.0297995, centroid.getX(), 5, "iter " + i);
+      assertEquals(38.9119684, centroid.getY(), 5, "iter " + i);
+    }
   }
 }