René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ApacheHttp2Transport connection did not return to the pool when it is failed","articleBody":"Firebase Admin Java SDK v9.6.0\n\n```\nFirebaseOptions.Builder builder = FirebaseOptions.builder()\n...\n.setHttpTransport(new ApacheHttp2Transport(httpClient));\n```\n\n```\nApiFuture\u003cBatchResponse\u003e futures = firebaseMessaging.sendEachAsync(messages, dryRun);\nBatchResponse response;\ntry {\n      response = futures.get(TIME_OUT_MS, TimeUnit.MILLISECONDS);\n } catch (TimeoutException e) {\n   ...\n}\n```\n\n```\nfinal PoolStats total = poolingAsyncClientConnectionManager.getTotalStats();\nreturn String.format(\"Available=%d, leased=%d, pending=%d, max=%d\",\n                total.getAvailable(),\n                total.getLeased(),\n                total.getPending(),\n                total.getMax());\n```\n\nObservation:\nUnder very busy network,  FCM backend may return `Unknown error while making a remote service call: Write Timeout` or other errors.\n\nLog writing (successful or failed response) become slow and slower. Afterward, all pending requests were timed out at ` response = futures.get(TIME_OUT_MS, TimeUnit.MILLISECONDS);`\n\n```\nWhen the program just started:\nAvailable=95, leased=5, pending=0, max=200\n```\n```\nAfter some times:\nAvailable=0, leased=0, pending=0, max=200\n```\n\n-----------------------------------------------------------------------------------------------------------------------\nUpdate:\n\nWhen using `Google APIs Transports`:\nThere is `disconnect` implementation in [google-http-java-client](https://github.com/googleapis/google-http-java-client/blob/main/google-http-client/src/main/java/com/google/api/client/http/apache/ApacheHttpResponse.java#L118)\n\nHowever, when using `ApacheHttp2Transport`:\nThere is no such implementation in [ApacheHttp2Response ](https://github.com/firebase/firebase-admin-java/blob/master/src/main/java/com/google/firebase/internal/ApacheHttp2Response.java)\nwhen it is [disconnected](https://github.com/firebase/firebase-admin-java/blob/master/src/main/java/com/google/firebase/internal/ErrorHandlingHttpClient.java#L113), no matter the response is successfully or failed.","author":{"url":"https://github.com/meor9zcu12","@type":"Person","name":"meor9zcu12"},"datePublished":"2025-09-22T07:28:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/1134/firebase-admin-java/issues/1134"}