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OpenTelemetry and SigNoz Resolve 20-Second Kubernetes API Lag in 15 Minutes

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A Kubernetes API began experiencing 20-second response delays that standard CPU and memory metrics failed to explain. The engineer deployed SigNoz via Helm and used the OpenTelemetry Operator to auto-instrument a Java application without modifying its source code. Distributed traces quickly revealed that the database itself was healthy, and the bottleneck was occurring before any database call was made. Correlated JVM metrics exposed thread deadlocks caused by application threads waiting on asynchronous external responses. Patching the thread pool logic restored response times to milliseconds, highlighting auto-instrumentation as a fast, vendor-neutral debugging approach.

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OpenTelemetry and SigNoz Resolve 20-Second Kubernetes API Lag in 15 Minutes · ShortSingh