apache/cassandra · error · ConfigurationException

Invalid value for progress_barrier_min_consistency_level %s.

Error message

Invalid value for progress_barrier_min_consistency_level %s. Allowed values: %s

What it means

progress_barrier_min_consistency_level must be one of the permitted consistency levels (ALL, EACH_QUORUM, LOCAL_QUORUM, QUORUM, ONE, NODE_LOCAL). DatabaseDescriptor throws this ConfigurationException when the configured value is not in that set.

Source

Thrown at src/java/org/apache/cassandra/config/DatabaseDescriptor.java:1256

        Paxos.setPaxosVariant(conf.paxos_variant);
        if (conf.paxos_state_purging == null)
            conf.paxos_state_purging = PaxosStatePurging.legacy;

        logInitializationOutcome(logger);

        if (conf.max_space_usable_for_compactions_in_percentage < 0 || conf.max_space_usable_for_compactions_in_percentage > 1)
            throw new ConfigurationException("max_space_usable_for_compactions_in_percentage must be between 0 and 1", false);

        if (conf.dump_heap_on_uncaught_exception && DatabaseDescriptor.getHeapDumpPath() == null)
            throw new ConfigurationException(String.format("Invalid configuration. Heap dump is enabled but cannot create heap dump output path: %s.", conf.heap_dump_path != null ? conf.heap_dump_path : "null"));

        conf.sai_options.validate();

        List<ConsistencyLevel> progressBarrierCLsArr = Arrays.asList(ALL, EACH_QUORUM, LOCAL_QUORUM, QUORUM, ONE, NODE_LOCAL);
        Set<ConsistencyLevel> progressBarrierCls = new HashSet<>(progressBarrierCLsArr);
        if (!progressBarrierCls.contains(conf.progress_barrier_min_consistency_level))
        {
            throw new ConfigurationException(String.format("Invalid value for progress_barrier_min_consistency_level %s. Allowed values: %s",
                                                           conf.progress_barrier_min_consistency_level, progressBarrierCLsArr));
        }

        if (!progressBarrierCls.contains(conf.progress_barrier_default_consistency_level))
        {
            throw new ConfigurationException(String.format("Invalid value for.progress_barrier_default_consistency_level %s. Allowed values: %s",
                                                           conf.progress_barrier_default_consistency_level, progressBarrierCLsArr));
        }

        if (conf.native_transport_min_backoff_on_queue_overload.toMilliseconds() <= 0)
            throw new ConfigurationException(" be positive");

        if (conf.native_transport_min_backoff_on_queue_overload.toMilliseconds() >= conf.native_transport_max_backoff_on_queue_overload.toMilliseconds())
            throw new ConfigurationException(String.format("native_transport_min_backoff_on_queue_overload should be strictly less than native_transport_max_backoff_on_queue_overload, but %s >= %s",
                                                           conf.native_transport_min_backoff_on_queue_overload,
                                                           conf.native_transport_max_backoff_on_queue_overload));

        if (conf.use_deterministic_table_id)

View on GitHub (pinned to 88fd0f6a0e)

Solutions

Set progress_barrier_min_consistency_level to one of: ALL, EACH_QUORUM, LOCAL_QUORUM, QUORUM, ONE, NODE_LOCAL
Remove the setting to use the default

Example fix

// before (cassandra.yaml)
progress_barrier_min_consistency_level: TWO
// after
progress_barrier_min_consistency_level: QUORUM

Defensive patterns

Strategy: validation

Validate before calling

java.util.Set<ConsistencyLevel> allowed = java.util.Set.of(ConsistencyLevel.ALL, ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.QUORUM, ConsistencyLevel.ONE, ConsistencyLevel.NODE_LOCAL); if (!allowed.contains(conf.progress_barrier_min_consistency_level)) throw new IllegalArgumentException("progress_barrier_min_consistency_level must be one of " + allowed);

Try / catch

try { DatabaseDescriptor.applySimpleConfig(conf); } catch (ConfigurationException e) { log.error(e.getMessage()); }

Prevention

Only use the six documented CLs for progress barrier settings
Let the default apply unless you specifically need to tune progress barriers

When it happens

Trigger: applySimpleConfig (via toolInitialization/applyAll) with progress_barrier_min_consistency_level set to a value not in the allowed list (e.g. TWO, THREE, LOCAL_ONE, ANY).

Common situations: Typo or unsupported CL chosen for progress barrier configuration; assuming all consistency levels are valid for progress barriers.

Understand the failure class

Background: Invalid enum value errors: "Unknown type", "Invalid scope", "must be one of" — when a string is not on the library's allowed list — this error's family across 23 libraries.

Related errors

AI-assisted analysis of apache/cassandra@88fd0f6a0e (2026-09-10). Data as JSON: /api/errors/81bb842009866764. Report an issue: GitHub.