diff --git a/aio/src/app/layout/doc-viewer/doc-viewer.component.ts b/aio/src/app/layout/doc-viewer/doc-viewer.component.ts
index 5a5ed3f4d0..26c0528a84 100644
--- a/aio/src/app/layout/doc-viewer/doc-viewer.component.ts
+++ b/aio/src/app/layout/doc-viewer/doc-viewer.component.ts
@@ -143,10 +143,18 @@ export class DocViewerComponent implements OnDestroy {
         switchMap(() => this.swapViews(addTitleAndToc)),
         tap(() => this.docRendered.emit()),
         catchError(err => {
-          const errorMessage = (err instanceof Error) ? err.stack : err;
+          const errorMessage = `${(err instanceof Error) ? err.stack : err}`;
           this.logger.error(new Error(`[DocViewer] Error preparing document '${doc.id}': ${errorMessage}`));
           this.nextViewContainer.innerHTML = '';
           this.setNoIndex(true);
+
+          // TODO(gkalpak): Remove this once gathering debug info is no longer needed.
+          if (/loading chunk \d+ failed/i.test(errorMessage)) {
+            // Print some info to help with debugging.
+            // (There is no reason to wait for this async call to complete before continuing.)
+            printSwDebugInfo();
+          }
+
           return this.void$;
         }),
     );
@@ -244,3 +252,63 @@ export class DocViewerComponent implements OnDestroy {
     );
   }
 }
+
+// Helpers
+/**
+ * Print some info regarding the ServiceWorker and the caches contents to help debugging potential
+ * issues with failing to find resources in the cache.
+ * (See https://github.com/angular/angular/issues/28114.)
+ */
+async function printSwDebugInfo(): Promise<void> {
+  console.log(`\nServiceWorker: ${navigator.serviceWorker?.controller?.state ?? 'N/A'}`);
+
+  if (typeof caches === 'undefined') {
+    console.log('\nCaches: N/A');
+  } else {
+    const allCacheNames = await caches.keys();
+    const swCacheNames = allCacheNames.filter(name => name.startsWith('ngsw:/:'));
+
+    await findCachesAndPrintEntries(swCacheNames, 'db:control', true, ['manifests']);
+    await findCachesAndPrintEntries(swCacheNames, 'assets:app-shell:cache', false);
+    await findCachesAndPrintEntries(swCacheNames, 'assets:app-shell:meta', true);
+  }
+
+  console.warn(
+      '\nIf you see this error, please report an issue at ' +
+      'https://github.com/angular/angular/issues/new?template=3-docs-bug.md including the above logs.');
+
+  // Internal helpers
+  async function findCachesAndPrintEntries(
+      swCacheNames: string[], nameSuffix: string, includeValues: boolean,
+      ignoredKeys: string[] = []): Promise<void> {
+    const cacheNames = swCacheNames.filter(name => name.endsWith(nameSuffix));
+
+    for (const cacheName of cacheNames) {
+      const cacheEntries = await getCacheEntries(cacheName, includeValues, ignoredKeys);
+      await printCacheEntries(cacheName, cacheEntries);
+    }
+  }
+
+  async function getCacheEntries(
+      name: string, includeValues: boolean,
+      ignoredKeys: string[] = []): Promise<{key: string, value?: object}[]> {
+    const ignoredUrls = new Set(ignoredKeys.map(key => new Request(key).url));
+
+    const cache = await caches.open(name);
+    const keys = (await cache.keys()).map(req => req.url).filter(url => !ignoredUrls.has(url));
+    const entries = await Promise.all(keys.map(async key => ({
+      key,
+      value: !includeValues ? undefined : await (await cache.match(key))?.json(),
+    })));
+
+    return entries;
+  }
+
+  function printCacheEntries(name: string, entries: {key: string, value?: object}[]): void {
+    const entriesStr = entries
+        .map(({key, value}) => `  - ${key}${!value ? '' : `: ${JSON.stringify(value)}`}`)
+        .join('\n');
+
+    console.log(`\nCache: ${name} (${entries.length} entries)\n${entriesStr}`);
+  }
+}
diff --git a/goldens/size-tracking/aio-payloads.json b/goldens/size-tracking/aio-payloads.json
index fef0112d62..18cd9550d2 100755
--- a/goldens/size-tracking/aio-payloads.json
+++ b/goldens/size-tracking/aio-payloads.json
@@ -3,7 +3,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 3033,
-        "main-es2015": 449310,
+        "main-es2015": 450953,
         "polyfills-es2015": 52343
       }
     }
@@ -12,7 +12,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 3033,
-        "main-es2015": 449759,
+        "main-es2015": 451402,
         "polyfills-es2015": 52493
       }
     }
@@ -21,9 +21,9 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 3153,
-        "main-es2015": 435362,
+        "main-es2015": 437005,
         "polyfills-es2015": 52493
       }
     }
   }
-}
\ No newline at end of file
+}