diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriter.java
index 2d57488..9e40949 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriter.java
@@ -1548,6 +1548,7 @@
 		endPhase(monitor);
 	}
 
+	@SuppressWarnings("Finally")
 	private void parallelDeltaSearch(ProgressMonitor monitor,
 			ObjectToPack[] list, int cnt, int threads) throws IOException {
 		DeltaCache dc = new ThreadSafeDeltaCache(config);
@@ -1569,15 +1570,22 @@
 			// Caller didn't give us a way to run the tasks, spawn up a
 			// temporary thread pool and make sure it tears down cleanly.
 			ExecutorService pool = Executors.newFixedThreadPool(threads);
+			Throwable e1 = null;
 			try {
 				runTasks(pool, pm, taskBlock, errors);
+			} catch (Exception e) {
+				e1 = e;
 			} finally {
 				pool.shutdown();
 				for (;;) {
 					try {
-						if (pool.awaitTermination(60, TimeUnit.SECONDS))
+						if (pool.awaitTermination(60, TimeUnit.SECONDS)) {
 							break;
+						}
 					} catch (InterruptedException e) {
+						if (e1 != null) {
+							e.addSuppressed(e1);
+						}
 						throw new IOException(JGitText
 								.get().packingCancelledDuringObjectsWriting, e);
 					}