diff --git a/lucene/misc/src/java/org/apache/lucene/misc/index/BPIndexReorderer.java b/lucene/misc/src/java/org/apache/lucene/misc/index/BPIndexReorderer.java
index 9b61c58e7f1..52f1e646ccf 100644
--- a/lucene/misc/src/java/org/apache/lucene/misc/index/BPIndexReorderer.java
+++ b/lucene/misc/src/java/org/apache/lucene/misc/index/BPIndexReorderer.java
@@ -74,7 +74,9 @@ import org.apache.lucene.util.OfflineSorter.BufferSize;
  *
  * Directory targetDir = FSDirectory.open(targetPath);
  * BPIndexReorderer reorderer = new BPIndexReorderer();
- * reorderer.setForkJoinPool(ForkJoinPool.commonPool());
+ * ForkJoinPool pool = new ForkJoinPool(Runtime.getRuntime().availableProcessors(),
+ *     p -> new ForkJoinWorkerThread(p) {}, null, random().nextBoolean());
+ * reorderer.setForkJoinPool(pool);
  * reorderer.setFields(Collections.singleton("body"));
  * CodecReader reorderedReaderView = reorderer.reorder(SlowCodecReaderWrapper.wrap(reader), targetDir);
  * try (IndexWriter w = new IndexWriter(targetDir, new IndexWriterConfig().setOpenMode(OpenMode.CREATE))) {
diff --git a/lucene/misc/src/test/org/apache/lucene/misc/index/TestBPIndexReorderer.java b/lucene/misc/src/test/org/apache/lucene/misc/index/TestBPIndexReorderer.java
index 4b6a9a85037..13d6989ff74 100644
--- a/lucene/misc/src/test/org/apache/lucene/misc/index/TestBPIndexReorderer.java
+++ b/lucene/misc/src/test/org/apache/lucene/misc/index/TestBPIndexReorderer.java
@@ -21,6 +21,7 @@ import static org.apache.lucene.misc.index.BPIndexReorderer.fastLog2;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinWorkerThread;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field.Store;
 import org.apache.lucene.document.StoredField;
@@ -47,7 +48,11 @@ public class TestBPIndexReorderer extends LuceneTestCase {
 
   public void testSingleTermWithForkJoinPool() throws IOException {
     int concurrency = TestUtil.nextInt(random(), 1, 8);
-    ForkJoinPool pool = new ForkJoinPool(concurrency);
+    // The default ForkJoinPool implementation uses a thread factory that removes all permissions on
+    // threads, so we need to create our own to avoid tests failing with FS-based directories.
+    ForkJoinPool pool =
+        new ForkJoinPool(
+            concurrency, p -> new ForkJoinWorkerThread(p) {}, null, random().nextBoolean());
     try {
       doTestSingleTerm(pool);
     } finally {