{"record":{"id":"db7c84bcf5a94898","repo":"apache/cassandra","slug":"failed-to-transfer-all-hints-to-will-retry","errorCode":null,"errorMessage":"Failed to transfer all hints to {}: {}; will retry in {} seconds","messagePattern":"Failed to transfer all hints to (.+?): (.+?); will retry in (.+?) seconds","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"src/java/org/apache/cassandra/hints/HintsDispatchExecutor.java","lineNumber":176,"sourceCode":"         */\n        private final Supplier<UUID> hostIdSupplier;\n\n        private TransferHintsTask(HintsCatalog catalog, Supplier<UUID> hostIdSupplier)\n        {\n            this.catalog = catalog;\n            this.hostIdSupplier = hostIdSupplier;\n        }\n\n        @Override\n        public void run()\n        {\n            UUID hostId = hostIdSupplier.get();\n            InetAddressAndPort address = StorageService.instance.getEndpointForHostId(hostId);\n            logger.info(\"Transferring all hints to {}: {}\", address, hostId);\n            if (transfer(hostId))\n                return;\n\n            logger.warn(\"Failed to transfer all hints to {}: {}; will retry in {} seconds\", address, hostId, 10);\n\n            try\n            {\n                TimeUnit.SECONDS.sleep(10);\n            }\n            catch (InterruptedException e)\n            {\n                throw new UncheckedInterruptedException(e);\n            }\n\n            hostId = hostIdSupplier.get();\n            logger.info(\"Transferring all hints to {}: {}\", address, hostId);\n            if (!transfer(hostId))\n            {\n                logger.error(\"Failed to transfer all hints to {}: {}\", address, hostId);\n                throw new RuntimeException(\"Failed to transfer all hints to \" + hostId);\n            }\n        }","sourceCodeStart":158,"sourceCodeEnd":194,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/hints/HintsDispatchExecutor.java#L158-L194","documentation":"HintsService's dispatch task transfers all accumulated hints to a target host (typically when a node is declared alive again after HINTED_HANDOFF or via 'nodetool truncat... / hint delivery'). If transfer(hostId) fails to deliver everything, the run loop logs this warning, sleeps 10 seconds, and retries until successful or cancelled.","triggerScenarios":"MaxHintsTransferAttempts-style run loop where transfer() returns false because the target endpoint is unavailable, the internode messaging fails, or the target hostId has no resolvable endpoint (getEndpointForHostId returns null).","commonSituations":"Target node flapping up/down during handoff; node decommissioned but its hostId still referenced; network instability between DCs during hinted handoff.","solutions":["Confirm the target node is actually up and reachable (nodetool status, ping gossip port)","Check whether the hostId maps to a live endpoint; if the node was replaced/decommissioned, clear stale hints (nodetool truncatehints or delete hints files)","Inspect logs on both ends for messaging failures during the transfer window","If the target is gone permanently, remove pending hints for that hostId"],"exampleFix":"// before: retrying forever for a decommissioned host\n// after: drop hints for the dead hostId\nnodetool truncatehints --by-host <dead-host-uuid>  # or remove files in hints dir","handlingStrategy":"retry","validationCode":"// before transfer, check the target is resolvable and alive\nInetAddressAndPort ep = StorageService.instance.getEndpointForHostId(hostId);\nboolean transferable = ep != null && FailureDetector.instance.isAlive(ep);","typeGuard":null,"tryCatchPattern":"if (!transfer(hostId)) {\n  logger.warn(\"Hints transfer to {} incomplete; retrying\", hostId);\n  TimeUnit.SECONDS.sleep(retryDelaySeconds);\n}","preventionTips":["Verify target node health before expecting handoff to complete","Clean up hints for decommissioned/replaced hosts (truncatehints)","Watch for repeated warnings — indicates persistent connectivity issues","Ensure time synchronization and stable messaging between DCs"],"tags":["hints","handoff","retry","transfer"],"backgroundTag":"network-request-failed","analyzedSha":"88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1","analyzedAt":"2026-09-10T07:29:22.284Z","contentChangedAt":"2026-09-10T07:29:22.284Z","schemaVersion":2},"datasetVersion":"2026-09-17T15:17:12.973Z"}