cassandra_client_request_error

Number of request errors by operation type (timeout, unavailable, failure)

Dimensions:None

Available on:

OpenTelemetry (1)

Interface Metrics (1)

OpenTelemetry

cassandra.client.request.error.count

Number of request errors by operation type (timeout, unavailable, failure)

Dimensions:None

Sources

cassandra.client.request.error.countgithub.com

Knowledge Base (2 documents, 0 chunks)

guideApache Cassandra Monitoring with OpenTelemetry [including dashboards and alerts] | SigNoz3733 wordsscore: 0.95Comprehensive guide on monitoring Apache Cassandra using OpenTelemetry for metrics collection. Covers the complete architecture from JMX metrics exposure to OTel Collector integration with SigNoz, and provides detailed explanations of critical production metrics including latency, compaction, storage, and JVM health indicators.

guideCassandra Performance: The Most Comprehensive Overview You’ll Ever See3493 wordsscore: 0.72This comprehensive guide explains Cassandra performance fundamentals including data modeling, partitioning, denormalization, and write/read operations. It covers internal mechanisms like memtables, SSTables, commit logs, and the token ring architecture. While not explicitly focused on monitoring, it provides deep operational context essential for understanding what to monitor and why certain metrics matter.

Related Insights (3)

JVM Heap Pressure Manifesting as Write Timeoutscritical

When heap usage climbs above 80-90% without GC recovery, or when GC pause times exceed 500ms, Cassandra cannot process requests during stop-the-world pauses. This manifests as WriteTimeoutException at the application layer despite healthy disk and network.

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Hinted Handoff Backlog Indicating Network Partitioncritical

Rising cassandra_storage_count_hints while all nodes appear up in nodetool status indicates silent network partitions or zombie nodes that accept gossip but fail write requests. This causes eventual consistency drift between replicas.

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Dropped Messages Indicate Overload Before Timeoutcritical

cassandra_dropped_messages represents Cassandra's load-shedding mechanism when requests can't be processed within timeout. This is a leading indicator of cluster overload — messages drop before clients see timeouts, revealing capacity problems earlier than error rates.

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