{"id":"4657446abff99e1d","repo":"redis/redis-py","slug":"redis-cluster-cannot-be-connected-please-provide-465744","errorCode":null,"errorMessage":"Redis Cluster cannot be connected. Please provide at least one reachable node: {str(exception)}","messagePattern":"Redis Cluster cannot be connected\\. Please provide at least one reachable node: (.+?)","errorType":"exception","errorClass":"RedisClusterException","httpStatus":null,"severity":"error","filePath":"redis/cluster.py","lineNumber":2774,"sourceCode":"                            if tmp_slot.name != target_node.name:\n                                disagreements.append(\n                                    f\"{tmp_slot.name} vs {target_node.name} on slot: {i}\"\n                                )\n\n                                if len(disagreements) > 5:\n                                    raise RedisClusterException(\n                                        f\"startup_nodes could not agree on a valid \"\n                                        f\"slots cache: {', '.join(disagreements)}\"\n                                    )\n\n                fully_covered = self.check_slots_coverage(tmp_slots)\n                if fully_covered:\n                    # Don't need to continue to the next startup node if all\n                    # slots are covered\n                    break\n\n            if not startup_nodes_reachable:\n                raise RedisClusterException(\n                    f\"Redis Cluster cannot be connected. Please provide at least \"\n                    f\"one reachable node: {str(exception)}\"\n                ) from exception\n\n            # Create Redis connections to all nodes\n            self.create_redis_connections(list(tmp_nodes_cache.values()))\n\n            # Check if the slots are not fully covered\n            if not fully_covered and self._require_full_coverage:\n                # Despite the requirement that the slots be covered, there\n                # isn't a full coverage\n                raise RedisClusterException(\n                    f\"All slots are not covered after query all startup_nodes. \"\n                    f\"{len(tmp_slots)} of {REDIS_CLUSTER_HASH_SLOTS} \"\n                    f\"covered...\"\n                )\n\n            # Set the tmp variables to the real variables","sourceCodeStart":2756,"sourceCodeEnd":2792,"githubUrl":"https://github.com/redis/redis-py/blob/da03cdc7e8731092b13e395605c3c1fb2de25de1/redis/cluster.py#L2756-L2792","documentation":"Error \"Redis Cluster cannot be connected. Please provide at least one reachable node: {str(exception)}\" thrown in redis/redis-py.","triggerScenarios":"Thrown at redis/cluster.py:2774 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"da03cdc7e8731092b13e395605c3c1fb2de25de1","analyzedAt":"2026-08-04T20:26:47.563Z","schemaVersion":2}