--- layout: default title: "Vipimo vya Kiufundi vya Uanzishaji na Kukomesha Kazi kwa Ufasaha (Import/Export)" parent: "Swahili (Beta)" --- # Vipimo vya Kiufundi vya Uanzishaji na Kukomesha Kazi kwa Ufasaha (Import/Export) > **Beta Translation:** This document was translated via Machine Learning and as such may not be 100% accurate. All non-English languages are currently classified as Beta. ## Tatizo Hivi sasa, mlango wa TrustGraph unapoteza ujumbe wakati wa kufunga muunganisho wa websocket katika operesheni za uanzishaji na kukomesha kazi. Hii hutokea kwa sababu ya migogoro ambapo ujumbe unaendelea hutupwa kabla ya kufika kwa lengo lake (mifereji ya Pulsar kwa uanzishaji, wateja wa websocket kwa kukomesha kazi). ### Masuala ya Upande wa Uanzishaji 1. Picha ya folyo ya `asyncio.Queue` ya mchapishaji haijafunguliwa wakati wa kukomesha kazi. 2. Websocket hufungwa kabla ya kuhakikisha kwamba ujumbe uliopangwa kufika kwenye Pulsar. <<<<<<< HEAD 3. Hakuna mfumo wa uthibitisho wa uwasilishaji wa ujumbe kwa mafanikio. ### Masuala ya Upande wa Kukomesha Kazi 1. Ujumbe unaidhinishwa katika Pulsar kabla ya uwasilishaji wa mafanikio kwa wateja. 2. Muda uliopangwa (timeouts) husababisha kupotea kwa ujumbe wakati mifereji imejaa. 3. Hakuna mfumo wa kudhibiti kasi (backpressure) wa kushughulikia watumiaji (consumers) ambao ni polepole. ======= 3. Hakuna mfumo wa utambuzi kwa uwasilishaji wa ujumbe unaofanikiwa. ### Masuala ya Upande wa Kukomesha Kazi 1. Ujumbe hutambuliwa katika Pulsar kabla ya uwasilishaji wa mafanikio kwa wateja. 2. Muda uliopangwa (timeouts) husababisha kupotea kwa ujumbe wakati mifereji imejaa. 3. Hakuna mfumo wa kudhibiti kasi (backpressure) kwa kushughulikia watumiaji (consumers) ambao ni polepole. >>>>>>> 82edf2d (New md files from RunPod) 4. Vituo vingi vya kuhifadhi ambapo data inaweza kupotea. ## Muhtasari wa Muundo ``` Import Flow: Client -> Websocket -> TriplesImport -> Publisher -> Pulsar Queue Export Flow: Pulsar Queue -> Subscriber -> TriplesExport -> Websocket -> Client ``` ## Marekebisho Yanayopendekezwa ### 1. Maboresho ya Mchapishaji (Upande wa Uingizaji) #### A. Kusafisha Kina Kesi ya Mfululizo **Faili**: `trustgraph-base/trustgraph/base/publisher.py` ```python class Publisher: def __init__(self, client, topic, schema=None, max_size=10, chunking_enabled=True, drain_timeout=5.0): self.client = client self.topic = topic self.schema = schema self.q = asyncio.Queue(maxsize=max_size) self.chunking_enabled = chunking_enabled self.running = True self.draining = False # New state for graceful shutdown self.task = None self.drain_timeout = drain_timeout async def stop(self): """Initiate graceful shutdown with draining""" self.running = False self.draining = True if self.task: # Wait for run() to complete draining await self.task async def run(self): """Enhanced run method with integrated draining logic""" while self.running or self.draining: try: producer = self.client.create_producer( topic=self.topic, schema=JsonSchema(self.schema), chunking_enabled=self.chunking_enabled, ) drain_end_time = None while self.running or self.draining: try: # Start drain timeout when entering drain mode if self.draining and drain_end_time is None: drain_end_time = time.time() + self.drain_timeout logger.info(f"Publisher entering drain mode, timeout={self.drain_timeout}s") # Check drain timeout if self.draining and time.time() > drain_end_time: if not self.q.empty(): logger.warning(f"Drain timeout reached with {self.q.qsize()} messages remaining") self.draining = False break # Calculate wait timeout based on mode if self.draining: # Shorter timeout during draining to exit quickly when empty timeout = min(0.1, drain_end_time - time.time()) else: # Normal operation timeout timeout = 0.25 # Get message from queue id, item = await asyncio.wait_for( self.q.get(), timeout=timeout ) # Send the message (single place for sending) if id: producer.send(item, { "id": id }) else: producer.send(item) except asyncio.TimeoutError: # If draining and queue is empty, we're done if self.draining and self.q.empty(): logger.info("Publisher queue drained successfully") self.draining = False break continue except asyncio.QueueEmpty: # If draining and queue is empty, we're done if self.draining and self.q.empty(): logger.info("Publisher queue drained successfully") self.draining = False break continue # Flush producer before closing if producer: producer.flush() producer.close() except Exception as e: logger.error(f"Exception in publisher: {e}", exc_info=True) if not self.running and not self.draining: return # If handler drops out, sleep a retry await asyncio.sleep(1) async def send(self, id, item): """Send still works normally - just adds to queue""" if self.draining: # Optionally reject new messages during drain raise RuntimeError("Publisher is shutting down, not accepting new messages") await self.q.put((id, item)) ``` **Manufaa Muhimu ya Ubunifu:** **Eneo Moja la Kutuma:** Wito wote wa `producer.send()` hutokea katika sehemu moja ndani ya mbinu ya `run()`. <<<<<<< HEAD **Mashine ya Hali Safi:** Hali tatu wazi - inafanya kazi, inatakatishwa, imesimama. **Ulinzi wa Muda:** Haingii katika hali ya kukwama kwa muda usio na kikomo wakati wa utaratibu wa utakatishaji. **Ufuatiliaji Bora:** Uandikaji wazi wa maendeleo ya utaratibu wa utakatishaji na mabadiliko ya hali. **Kukataa kwa Ujumbe (Hiari):** Inaweza kukataa ujumbe mpya wakati wa awamu ya kuzima. ======= **Mashine ya Hali Safi:** Hali tatu wazi - inafanya kazi, inachosha, imesimama. **Ulinzi wa Muda:** Haitemei kwa muda usio na kikomo wakati wa kuchosha. **Ufuatiliaji Bora:** Uandikaji wazi wa maendeleo ya kuchosha na mabadiliko ya hali. **Kukataa Ujumbe wa Hiari:** Inaweza kukataa ujumbe mpya wakati wa awamu ya kuzima. >>>>>>> 82edf2d (New md files from RunPod) #### B. Mpangilio Ulioboreshwa wa Kuzima **Faili:** `trustgraph-flow/trustgraph/gateway/dispatch/triples_import.py` ```python class TriplesImport: async def destroy(self): """Enhanced destroy with proper shutdown order""" # Step 1: Stop accepting new messages self.running.stop() # Step 2: Wait for publisher to drain its queue logger.info("Draining publisher queue...") await self.publisher.stop() # Step 3: Close websocket only after queue is drained if self.ws: await self.ws.close() ``` ### 2. Maboresho kwa Wateja (Upande wa Uhamisho) #### A. Mfumo Uliounganishwa wa Utoaji **Faili**: `trustgraph-base/trustgraph/base/subscriber.py` ```python class Subscriber: def __init__(self, client, topic, subscription, consumer_name, schema=None, max_size=100, metrics=None, backpressure_strategy="block", drain_timeout=5.0): # ... existing init ... self.backpressure_strategy = backpressure_strategy self.running = True self.draining = False # New state for graceful shutdown self.drain_timeout = drain_timeout self.pending_acks = {} # Track messages awaiting delivery async def stop(self): """Initiate graceful shutdown with draining""" self.running = False self.draining = True if self.task: # Wait for run() to complete draining await self.task async def run(self): """Enhanced run method with integrated draining logic""" while self.running or self.draining: if self.metrics: self.metrics.state("stopped") try: self.consumer = self.client.subscribe( topic = self.topic, subscription_name = self.subscription, consumer_name = self.consumer_name, schema = JsonSchema(self.schema), ) if self.metrics: self.metrics.state("running") logger.info("Subscriber running...") drain_end_time = None while self.running or self.draining: # Start drain timeout when entering drain mode if self.draining and drain_end_time is None: drain_end_time = time.time() + self.drain_timeout logger.info(f"Subscriber entering drain mode, timeout={self.drain_timeout}s") # Stop accepting new messages from Pulsar during drain self.consumer.pause_message_listener() # Check drain timeout if self.draining and time.time() > drain_end_time: async with self.lock: total_pending = sum( q.qsize() for q in list(self.q.values()) + list(self.full.values()) ) if total_pending > 0: logger.warning(f"Drain timeout reached with {total_pending} messages in queues") self.draining = False break # Check if we can exit drain mode if self.draining: async with self.lock: all_empty = all( q.empty() for q in list(self.q.values()) + list(self.full.values()) ) if all_empty and len(self.pending_acks) == 0: logger.info("Subscriber queues drained successfully") self.draining = False break # Process messages only if not draining if not self.draining: try: msg = await asyncio.to_thread( self.consumer.receive, timeout_millis=250 ) except _pulsar.Timeout: continue except Exception as e: logger.error(f"Exception in subscriber receive: {e}", exc_info=True) raise e if self.metrics: self.metrics.received() # Process the message await self._process_message(msg) else: # During draining, just wait for queues to empty await asyncio.sleep(0.1) except Exception as e: logger.error(f"Subscriber exception: {e}", exc_info=True) finally: # Negative acknowledge any pending messages for msg in self.pending_acks.values(): self.consumer.negative_acknowledge(msg) self.pending_acks.clear() if self.consumer: self.consumer.unsubscribe() self.consumer.close() self.consumer = None if self.metrics: self.metrics.state("stopped") if not self.running and not self.draining: return # If handler drops out, sleep a retry await asyncio.sleep(1) async def _process_message(self, msg): """Process a single message with deferred acknowledgment""" # Store message for later acknowledgment msg_id = str(uuid.uuid4()) self.pending_acks[msg_id] = msg try: id = msg.properties()["id"] except: id = None value = msg.value() delivery_success = False async with self.lock: # Deliver to specific subscribers if id in self.q: delivery_success = await self._deliver_to_queue( self.q[id], value ) # Deliver to all subscribers for q in self.full.values(): if await self._deliver_to_queue(q, value): delivery_success = True # Acknowledge only on successful delivery if delivery_success: self.consumer.acknowledge(msg) del self.pending_acks[msg_id] else: # Negative acknowledge for retry self.consumer.negative_acknowledge(msg) del self.pending_acks[msg_id] async def _deliver_to_queue(self, queue, value): """Deliver message to queue with backpressure handling""" try: if self.backpressure_strategy == "block": # Block until space available (no timeout) await queue.put(value) return True elif self.backpressure_strategy == "drop_oldest": # Drop oldest message if queue full if queue.full(): try: queue.get_nowait() if self.metrics: self.metrics.dropped() except asyncio.QueueEmpty: pass await queue.put(value) return True elif self.backpressure_strategy == "drop_new": # Drop new message if queue full if queue.full(): if self.metrics: self.metrics.dropped() return False await queue.put(value) return True except Exception as e: logger.error(f"Failed to deliver message: {e}") return False ``` **Manufaa Muhimu ya Ubunifu (kulingana na mtindo wa Mchapishaji):** **Eneo Moja la Ufuatiliaji**: Ufuatiliaji wote wa ujumbe hutokea katika njia ya `run()` <<<<<<< HEAD **Mashine Safi ya Hali**: Hali tatu wazi - inafanya kazi, inachosha, imesimama **Kusitisha Wakati wa Kuchosha**: Inasimamisha kupokea ujumbe mpya kutoka Pulsar wakati inachosha folyo zilizopo **Ulinzi wa Muda**: Haingii katika hali ya kukwama kwa muda usio na kikomo wakati wa kuchosha ======= **Mashine ya Hali Safi**: Hali tatu wazi - inafanya kazi, inatakatishwa, imesimama **Kusitisha Wakati wa Kufyatua**: Inasimamisha kupokea ujumbe mpya kutoka Pulsar wakati wa kufyatua folyo zilizopo **Ulinzi wa Muda**: Haingii katika hali ya kukamatwa kwa muda usio na kikomo wakati wa kufyatua >>>>>>> 82edf2d (New md files from RunPod) **Usafi Sawa**: Inatambua vibaya ujumbe wowote usiofikishwa wakati wa kuzima #### B. Maboresho ya Kidhibiti cha Uhamisho **Faili**: `trustgraph-flow/trustgraph/gateway/dispatch/triples_export.py` ```python class TriplesExport: async def destroy(self): """Enhanced destroy with graceful shutdown""" # Step 1: Signal stop to prevent new messages self.running.stop() # Step 2: Wait briefly for in-flight messages await asyncio.sleep(0.5) # Step 3: Unsubscribe and stop subscriber (triggers queue drain) if hasattr(self, 'subs'): await self.subs.unsubscribe_all(self.id) await self.subs.stop() # Step 4: Close websocket last if self.ws and not self.ws.closed: await self.ws.close() async def run(self): """Enhanced run with better error handling""" self.subs = Subscriber( client = self.pulsar_client, topic = self.queue, consumer_name = self.consumer, subscription = self.subscriber, schema = Triples, backpressure_strategy = "block" # Configurable ) await self.subs.start() self.id = str(uuid.uuid4()) q = await self.subs.subscribe_all(self.id) consecutive_errors = 0 max_consecutive_errors = 5 while self.running.get(): try: resp = await asyncio.wait_for(q.get(), timeout=0.5) await self.ws.send_json(serialize_triples(resp)) consecutive_errors = 0 # Reset on success except asyncio.TimeoutError: continue except queue.Empty: continue except Exception as e: logger.error(f"Exception sending to websocket: {str(e)}") consecutive_errors += 1 if consecutive_errors >= max_consecutive_errors: logger.error("Too many consecutive errors, shutting down") break # Brief pause before retry await asyncio.sleep(0.1) # Graceful cleanup handled in destroy() ``` ### 3. Maboresho ya Kawaida ya Soketi **Faili**: `trustgraph-flow/trustgraph/gateway/endpoint/socket.py` ```python class SocketEndpoint: async def listener(self, ws, dispatcher, running): """Enhanced listener with graceful shutdown""" async for msg in ws: if msg.type == WSMsgType.TEXT: await dispatcher.receive(msg) continue elif msg.type == WSMsgType.BINARY: await dispatcher.receive(msg) continue else: # Graceful shutdown on close logger.info("Websocket closing, initiating graceful shutdown") running.stop() # Allow time for dispatcher cleanup await asyncio.sleep(1.0) break async def handle(self, request): """Enhanced handler with better cleanup""" # ... existing setup code ... try: async with asyncio.TaskGroup() as tg: running = Running() dispatcher = await self.dispatcher( ws, running, request.match_info ) worker_task = tg.create_task( self.worker(ws, dispatcher, running) ) lsnr_task = tg.create_task( self.listener(ws, dispatcher, running) ) except ExceptionGroup as e: logger.error("Exception group occurred:", exc_info=True) # Attempt graceful dispatcher shutdown try: await asyncio.wait_for( dispatcher.destroy(), timeout=5.0 ) except asyncio.TimeoutError: logger.warning("Dispatcher shutdown timed out") except Exception as de: logger.error(f"Error during dispatcher cleanup: {de}") except Exception as e: logger.error(f"Socket exception: {e}", exc_info=True) finally: # Ensure dispatcher cleanup if dispatcher and hasattr(dispatcher, 'destroy'): try: await dispatcher.destroy() except: pass # Ensure websocket is closed if ws and not ws.closed: await ws.close() return ws ``` ## Chaguo za Usanidi Ongeza usaidizi wa usanidi ili kurekebisha tabia: ```python # config.py class GracefulShutdownConfig: # Publisher settings PUBLISHER_DRAIN_TIMEOUT = 5.0 # Seconds to wait for queue drain PUBLISHER_FLUSH_TIMEOUT = 2.0 # Producer flush timeout # Subscriber settings SUBSCRIBER_DRAIN_TIMEOUT = 5.0 # Seconds to wait for queue drain BACKPRESSURE_STRATEGY = "block" # Options: "block", "drop_oldest", "drop_new" SUBSCRIBER_MAX_QUEUE_SIZE = 100 # Maximum queue size before backpressure # Socket settings SHUTDOWN_GRACE_PERIOD = 1.0 # Seconds to wait for graceful shutdown MAX_CONSECUTIVE_ERRORS = 5 # Maximum errors before forced shutdown # Monitoring LOG_QUEUE_STATS = True # Log queue statistics on shutdown METRICS_ENABLED = True # Enable metrics collection ``` ## Mkakati wa Majaribio ### Majaribio ya Kitengo ```python async def test_publisher_queue_drain(): """Verify Publisher drains queue on shutdown""" publisher = Publisher(...) # Fill queue with messages for i in range(10): await publisher.send(f"id-{i}", {"data": i}) # Stop publisher await publisher.stop() # Verify all messages were sent assert publisher.q.empty() assert mock_producer.send.call_count == 10 async def test_subscriber_deferred_ack(): """Verify Subscriber only acks on successful delivery""" subscriber = Subscriber(..., backpressure_strategy="drop_new") # Fill queue to capacity queue = await subscriber.subscribe("test") for i in range(100): await queue.put({"data": i}) # Try to add message when full msg = create_mock_message() await subscriber._process_message(msg) # Verify negative acknowledgment assert msg.negative_acknowledge.called assert not msg.acknowledge.called ``` ### Majaribio ya Uunganishaji ```python async def test_import_graceful_shutdown(): """Test import path handles shutdown gracefully""" # Setup import_handler = TriplesImport(...) await import_handler.start() # Send messages messages = [] for i in range(100): msg = {"metadata": {...}, "triples": [...]} await import_handler.receive(msg) messages.append(msg) # Shutdown while messages in flight await import_handler.destroy() # Verify all messages reached Pulsar received = await pulsar_consumer.receive_all() assert len(received) == 100 async def test_export_no_message_loss(): """Test export path doesn't lose acknowledged messages""" # Setup Pulsar with test messages for i in range(100): await pulsar_producer.send({"data": i}) # Start export handler export_handler = TriplesExport(...) export_task = asyncio.create_task(export_handler.run()) # Receive some messages received = [] for _ in range(50): msg = await websocket.receive() received.append(msg) # Force shutdown await export_handler.destroy() # Continue receiving until websocket closes while not websocket.closed: try: msg = await websocket.receive() received.append(msg) except: break # Verify no acknowledged messages were lost assert len(received) >= 50 ``` <<<<<<< HEAD ## Mpango wa Utendaji ======= ## Mpango wa Utumizaji >>>>>>> 82edf2d (New md files from RunPod) ### Awamu ya 1: Marekebisho Muhimu (Wiki ya 1) Marekebisho ya muda wa utambuzi wa mshabiki (kuzuia upotevu wa ujumbe) Ongeza utaratibu wa kusafisha folyo ya mchapishaji <<<<<<< HEAD Tuma kwenye mazingira ya majaribio ### Awamu ya 2: Kusitisha kwa Ufasaha (Wiki ya 2) Lenga kusitisha kwa ufasaha Ongeza mikakati ya shinikizo nyuma ======= Toa toleo kwenye mazingira ya majaribio ### Awamu ya 2: Kusitisha kwa Ufasaha (Wiki ya 2) Lenga utaratibu wa usitishaji Ongeza mikakati ya kupunguza mzigo >>>>>>> 82edf2d (New md files from RunPod) Vipimo vya utendaji ### Awamu ya 3: Ufuatiliaji na Urekebishaji (Wiki ya 3) Ongeza vipimo vya kina ya folyo Ongeza arifa za upotevu wa ujumbe Rekebisha maadili ya muda wa kusubiri kulingana na data ya uzalishaji ## Ufuatiliaji na Arifa ### Vipimo vya Kufuata `publisher.queue.depth` - Ukubwa wa sasa wa folyo ya mchapishaji `publisher.messages.dropped` - Ujumbe uliopotea wakati wa kusitisha `subscriber.messages.negatively_acknowledged` - Utoaji ambao haujafanikiwa <<<<<<< HEAD `websocket.graceful_shutdowns` - Kusitisha kwa ufasaha ambavyo vimefanikiwa `websocket.forced_shutdowns` - Kusitisha kwa nguvu/kwa muda mrefu ======= `websocket.graceful_shutdowns` - Usitishaji wa ufasaha ambao umefanikiwa `websocket.forced_shutdowns` - Usitishaji wa lazima/wa muda >>>>>>> 82edf2d (New md files from RunPod) ### Arifa Kina cha folyo ya mchapishaji > 80% ya uwezo Upotevu wowote wa ujumbe wakati wa kusitisha Kiwango cha kukataa cha mshabiki > 1% <<<<<<< HEAD Muda wa kusitisha umepita ======= Muda wa kusitisha ambao umevuka >>>>>>> 82edf2d (New md files from RunPod) ## Ulinganifu na Mifumo ya Zamani Marekebisho yote yanahifadhi ulinganifu na mifumo ya zamani: Tabia ya kawaida haibadiliki bila usanidi Uwekaji wa sasa unaendelea kufanya kazi Kupungua kwa utendaji ikiwa vipengele vipya havipatikani ## Masuala ya Usalama Vipengele vipya vya mashambulizi haviongezwi <<<<<<< HEAD Shinikizo nyuma huzuia mashambulizi ya kutumia kumbukumbu nyingi Mipaka inayoweza kusanidiwa huzuia matumizi mabaya ya rasilimali ======= Kupunguza mzigo huzuia mashambulizi ya kutokwa na kumbukumbu Mipaka inayoweza kusanidiwa inazuia unyonyaji wa rasilimali >>>>>>> 82edf2d (New md files from RunPod) ## Athari za Utendaji Uwezekano mdogo wakati wa operesheni ya kawaida Kusitisha kunaweza kuchukua sekunde 5 zaidi (inaweza kusanidiwa) Matumizi ya kumbukumbu yanapingika na mipaka ya ukubwa wa folyo Athari ya CPU ni ndogo (<1% ya ongezeko)