diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
index 1519873..96a0649 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
@@ -186,13 +186,12 @@
 		// make sure gc() has caused creation of a new packfile
 		assertNotEquals(oldPackName, newPackName);
 
-		// Even when asking again for the set of packfiles outdated data
-		// will be returned. As long as the repository can work on cached data
-		// it will do so and not detect that a new packfile exists.
-		assertNotEquals(getSinglePack(repository).getPackName(), newPackName);
+		// When asking again for the set of packfiles the new updated data
+		// will be returned because of the rescan of the pack directory.
+		assertEquals(getSinglePack(repository).getPackName(), newPackName);
 
-		// Only when accessing object content it is required to rescan the pack
-		// directory and the new packfile will be detected.
+		// When accessing object content the new packfile refreshed from
+		// the rescan triggered from the list of packs.
 		repository.getObjectDatabase().open(b).getSize();
 		assertEquals(getSinglePack(repository).getPackName(), newPackName);
 		assertNotNull(getSinglePack(repository).getBitmapIndex());
diff --git a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
index aa9a177..bbfd0b0 100644
--- a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
+++ b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
@@ -64,6 +64,8 @@
 binaryHunkInvalidLength=Binary hunk, line {0}: input corrupt; expected length byte, got 0x{1}
 binaryHunkLineTooShort=Binary hunk, line {0}: input ended prematurely
 binaryHunkMissingNewline=Binary hunk, line {0}: input line not terminated by newline
+bitmapAccessErrorForPackfile=Error whilst trying to access bitmap file for {}
+bitmapFailedToGet=Failed to get bitmap index file {}
 bitmapMissingObject=Bitmap at {0} is missing {1}.
 bitmapsMustBePrepared=Bitmaps must be prepared before they may be written.
 bitmapUseNoopNoListener=Use NOOP instance for no listener
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
index a84b9d0..ef464e3 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
@@ -94,6 +94,8 @@
 	/***/ public String binaryHunkInvalidLength;
 	/***/ public String binaryHunkLineTooShort;
 	/***/ public String binaryHunkMissingNewline;
+	/***/ public String bitmapAccessErrorForPackfile;
+	/***/ public String bitmapFailedToGet;
 	/***/ public String bitmapMissingObject;
 	/***/ public String bitmapsMustBePrepared;
 	/***/ public String bitmapUseNoopNoListener;
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/Pack.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/Pack.java
index 3866c9f..212dbb2 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/Pack.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/Pack.java
@@ -1173,6 +1173,19 @@
 		return null;
 	}
 
+	synchronized void refreshBitmapIndex(PackFile bitmapIndexFile) {
+		this.bitmapIdx = Optionally.empty();
+		this.invalid = false;
+		this.bitmapIdxFile = bitmapIndexFile;
+		try {
+			getBitmapIndex();
+		} catch (IOException e) {
+			LOG.warn(JGitText.get().bitmapFailedToGet, bitmapIdxFile, e);
+			this.bitmapIdx = Optionally.empty();
+			this.bitmapIdxFile = null;
+		}
+	}
+
 	private synchronized PackReverseIndex getReverseIdx() throws IOException {
 		if (invalid) {
 			throw new PackInvalidException(packFile, invalidatingCause);
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackDirectory.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackDirectory.java
index b1da1cb..8221cff 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackDirectory.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackDirectory.java
@@ -118,10 +118,13 @@
 	}
 
 	Collection<Pack> getPacks() {
-		PackList list = packList.get();
-		if (list == NO_PACKS) {
-			list = scanPacks(list);
-		}
+		PackList list;
+		do {
+			list = packList.get();
+			if (list == NO_PACKS) {
+				list = scanPacks(list);
+			}
+		} while (searchPacksAgain(list));
 		Pack[] packs = list.packs;
 		return Collections.unmodifiableCollection(Arrays.asList(packs));
 	}
@@ -457,6 +460,13 @@
 					&& !oldPack.getFileSnapshot().isModified(packFile)) {
 				forReuse.remove(packFile.getName());
 				list.add(oldPack);
+				try {
+					if(oldPack.getBitmapIndex() == null) {
+						oldPack.refreshBitmapIndex(packFilesByExt.get(BITMAP_INDEX));
+					}
+				} catch (IOException e) {
+					LOG.warn(JGitText.get().bitmapAccessErrorForPackfile, oldPack.getPackName(), e);
+				}
 				continue;
 			}