{"record":{"id":"f77e5127de676d10","repo":"apache/cassandra","slug":"ignoring-schema-push-request-from-please-upgra","errorCode":null,"errorMessage":"Ignoring schema push request from {}, please upgrade","messagePattern":"Ignoring schema push request from (.+?), please upgrade","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"src/java/org/apache/cassandra/schema/SchemaPushVerbHandler.java","lineNumber":45,"sourceCode":"import org.apache.cassandra.net.Message;\n\n/**\n * Called when node receives updated schema state from the schema migration coordinator node.\n * Such happens when user makes local schema migration on one of the nodes in the ring\n * (which is going to act as coordinator) and that node sends (pushes) it's updated schema state\n * (in form of mutations) to all the alive nodes in the cluster.\n * @deprecated See CEP-21\n */\n@Deprecated(since = \"CEP-21\")\npublic final class SchemaPushVerbHandler implements IVerbHandler<Collection<Mutation>>\n{\n    public static final SchemaPushVerbHandler instance = new SchemaPushVerbHandler();\n\n    private static final Logger logger = LoggerFactory.getLogger(SchemaPushVerbHandler.class);\n\n    public void doVerb(final Message<Collection<Mutation>> message)\n    {\n        logger.warn(\"Ignoring schema push request from {}, please upgrade\", message.from());\n    }\n}\n","sourceCodeStart":27,"sourceCodeEnd":48,"githubUrl":"https://github.com/apache/cassandra/blob/88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1/src/java/org/apache/cassandra/schema/SchemaPushVerbHandler.java#L27-L48","documentation":"SchemaPushVerbHandler.doVerb receives a SCHEMA_PUSH message (legacy push-based schema propagation from a pre-4.0 node) and refuses to apply it. Cassandra 4+ uses pull-based gossip schema convergence, so pushed schema mutations from older nodes are deliberately ignored to prevent schema corruption during a mixed-version rolling upgrade.","triggerScenarios":"A cluster node running Cassandra < 4.0 sends a SCHEMA_PUSH verb message to a 4.0+ node; the handler unconditionally logs this warning and returns without processing.","commonSituations":"Rolling upgrades from 3.x to 4.x where an old node still pushes schema changes; operator sees the warning during a mixed-version window and wonders why DDL from an old node does not propagate.","solutions":["Upgrade the old node(s) sending schema push requests to Cassandra 4.0 or later.","Complete the rolling upgrade promptly and verify all nodes report the same schema version.","If the warning persists after upgrade, identify the sender address in the log and check its version via nodetool version / gossip info."],"exampleFix":"// before (3.x node pushing schema)\n// N/A - node-side behavior\n// after\n# upgrade all 3.x nodes to 4.x so pull-based schema agreement is used\n$ nodetool upgradesstables  # after upgrading each node","handlingStrategy":"validation","validationCode":"// before mixing versions, check all nodes are >= 4.0\nMap<InetAddress, String> versions = StorageService.instance.getReleaseVersions();\nboolean mixed = versions.values().stream().anyMatch(v -> v.startsWith(\"3.\") || v.startsWith(\"2.\"));\nif (mixed) throw new IllegalStateException(\"Complete rolling upgrade before DDL changes\");","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Never run DDL while the cluster has mixed 3.x/4.x versions.","Use nodetool gossipinfo or system.peers_v2 to verify node versions during upgrades.","Monitor logs for this warning during rolling upgrades; it flags an old sender."],"tags":["schema","mixed-version","upgrade","internal-messaging"],"backgroundTag":"unsupported-operation","analyzedSha":"88fd0f6a0eaed8943f05ac9e8f947882b8ddc8f1","analyzedAt":"2026-09-10T07:29:22.284Z","contentChangedAt":"2026-09-10T07:29:22.284Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}