{"record":{"id":"71fd863f6e105c77","repo":"risingwavelabs/risingwave","slug":"checkpoint-read-max-in-flight-chunks-must-be-gre","errorCode":null,"errorMessage":"`checkpoint_read_max_in_flight_chunks` must be greater than 0","messagePattern":"`checkpoint_read_max_in_flight_chunks` must be greater than 0","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"src/meta/node/src/lib.rs","lineNumber":638,"sourceCode":"        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.parallelism_control_batch_size == 0 {\n        let error_msg = \"`parallelism_control_batch_size` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.checkpoint_read_chunk_size == 0 {\n        let error_msg = \"`checkpoint_read_chunk_size` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.checkpoint_read_max_in_flight_chunks == 0 {\n        let error_msg = \"`checkpoint_read_max_in_flight_chunks` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.compaction_task_id_refill_capacity == 0 {\n        let error_msg = \"`compaction_task_id_refill_capacity` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.iceberg_compaction_report_timeout_sec == 0 {\n        let error_msg = \"`iceberg_compaction_report_timeout_sec` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);\n    }\n\n    if config.meta.iceberg_compaction_config_refresh_interval_sec == 0 {\n        let error_msg = \"`iceberg_compaction_config_refresh_interval_sec` must be greater than 0\";\n        tracing::error!(error_msg);\n        panic!(\"{}\", error_msg);","sourceCodeStart":620,"sourceCodeEnd":656,"githubUrl":"https://github.com/risingwavelabs/risingwave/blob/6469eb736d691e8e9b8a419a57edd6429ca77417/src/meta/node/src/lib.rs#L620-L656","documentation":"validate_config in src/meta/node/src/lib.rs:638 panics when `config.meta.checkpoint_read_max_in_flight_chunks` is 0. This is the concurrency limit for in-flight checkpoint read chunks; zero means no reads may ever be issued, so it is rejected at startup.","triggerScenarios":"Meta node startup with `meta.checkpoint_read_max_in_flight_chunks` set to 0 in the config.","commonSituations":"Attempts to throttle checkpoint reads to zero during maintenance, or wrong unit assumption (thinking it is a percentage).","solutions":["Set `meta.checkpoint_read_max_in_flight_chunks` to a positive integer (e.g. the default).","To reduce checkpoint read pressure, lower it to a small positive value like 1 instead of 0.","Remove the config line to restore the default."],"exampleFix":"// before\n[meta]\ncheckpoint_read_max_in_flight_chunks = 0\n\n// after\n[meta]\ncheckpoint_read_max_in_flight_chunks = 4","handlingStrategy":"validation","validationCode":"assert!(cfg.meta.checkpoint_read_max_in_flight_chunks > 0, \"checkpoint_read_max_in_flight_chunks must be > 0\");","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Express throttling as small positive integers, never zero.","Run `./risedev c`/smoke-start in staging before production rollout of config changes.","Keep a change log for meta config knobs."],"tags":["config","meta-node","checkpoint","validation"],"backgroundTag":"invalid-config-value","analyzedSha":"6469eb736d691e8e9b8a419a57edd6429ca77417","analyzedAt":"2026-09-11T21:06:21.487Z","contentChangedAt":"2026-09-11T21:06:21.487Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}