{"record":{"id":"9f7d587bf7b4a79d","repo":"apache/cassandra","slug":"failed-to-transfer-all-hints-to","errorCode":null,"errorMessage":"Failed to transfer all hints to ","messagePattern":"Failed to transfer all hints to ","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"src/java/org/apache/cassandra/hints/HintsDispatchExecutor.java","lineNumber":192,"sourceCode":"                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        }\n\n        private boolean transfer(UUID hostId)\n        {\n            catalog.stores()\n                   .map(store -> new DispatchHintsTask(store, hostId, true))\n                   .forEach(Runnable::run);\n\n            return !catalog.hasFiles();\n        }\n    }\n\n    private final class DispatchHintsTask implements Runnable\n    {\n        private final HintsStore store;\n        private final UUID hostId;\n        private final RateLimiter rateLimiter;","sourceCodeStart":174,"sourceCodeEnd":210,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/hints/HintsDispatchExecutor.java#L174-L210","documentation":"The DispatchTask (Major/DispatchTask in HintsDispatchExecutor) throws RuntimeException(\"Failed to transfer all hints to <hostId>\") after logging an error when transfer(hostId) returns false — i.e., not all hint files for the target could be delivered (e.g., the target is not caught up, a hints file failed to send, or the session failed). This is an internal retryable failure surfaced on the dispatch thread.","triggerScenarios":"nodetool transferhints / hinted handoff dispatch when the target node is unreachable mid-transfer, a hints file fails to send over the internode messaging connection, or transfer() exhausts its attempt while some stores/files remain undelivered.","commonSituations":"Target node down or flapping during transfer; network partitions or timeouts between DCs; large hint backlogs that hit connection timeouts; transferring hints to a hostId that was replaced/unknown to the local catalog.","solutions":["Ensure the target node is up and reachable (nodetool status, check gossip/Networking connections), then retry transfer.","Retry the transfer — dispatch is retried automatically with backoff for regular handoff; for manual transferhints rerun the command.","Check for messaging errors/timeouts in logs and fix network/TLS issues between nodes.","If hints are stale beyond max_hint_window_in_ms, they will be dropped; run a repair (nodetool repair) to converge data instead."],"exampleFix":"# before\nnodetool transferhints -- <target-ip>   # fails mid-transfer\n# after\n# ensure target is UP first, then retry\nnodetool status | grep <target-ip>\nnodetool transferhints -- <target-ip>   # retry until transfer() completes\n# alternatively rely on automatic hinted-handoff retries and repair","handlingStrategy":"retry","validationCode":"// before manual transfer, confirm target reachability\nif (!MessagingService.instance().getVersion(targetAddress).isKnown() || !Gossiper.instance.isAlive(targetAddress))\n    throw new IllegalStateException(\"target not alive\");","typeGuard":null,"tryCatchPattern":"try { nodetool transferhints(target); } catch (RuntimeException e) { scheduleRetryWithBackoff(target); }","preventionTips":["Verify the target node is UP and gossip-converged before transferring hints.","Ensure stable internode networking (timeouts, TLS, firewall) between source and target.","Watch dispatch-thread logs for repeated transfer failures and alert.","Run repair for ranges whose hints exceed max_hint_window_in_ms so data converges even when transfer fails."],"tags":["java","hints","network","internode"],"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"}