{"record":{"id":"4440e766e8c8be86","repo":"pinpoint-apm/pinpoint","slug":"buffermetric-initialize-fail","errorCode":null,"errorMessage":"BufferMetric initialize fail: {}","messagePattern":"BufferMetric initialize fail: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/context/provider/stat/buffer/BufferMetricProvider.java","lineNumber":57,"sourceCode":"\n    @Override\n    public BufferMetric get() {\n        BufferMetric bufferMetric = createBufferMetric(BUFFER_METRIC);\n        logger.info(\"loaded : {}\", bufferMetric);\n        return bufferMetric;\n    }\n\n    private BufferMetric createBufferMetric(String classToLoad) {\n        if (classToLoad == null) {\n            return BufferMetric.UNSUPPORTED_BUFFER_METRIC;\n        }\n        try {\n            @SuppressWarnings(\"unchecked\")\n            Class<BufferMetric> bufferMetricClass = (Class<BufferMetric>) Class.forName(classToLoad);\n            Constructor<BufferMetric> bufferMetricConstructor = bufferMetricClass.getConstructor();\n            return bufferMetricConstructor.newInstance();\n        } catch (ReflectiveOperationException e) {\n            logger.warn(\"BufferMetric initialize fail: {}\", classToLoad);\n            return BufferMetric.UNSUPPORTED_BUFFER_METRIC;\n        }\n    }\n}\n","sourceCodeStart":39,"sourceCodeEnd":62,"githubUrl":"https://github.com/pinpoint-apm/pinpoint/blob/744c3d3075e595656abb1ae331ad2c0e4c9eb996/agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/context/provider/stat/buffer/BufferMetricProvider.java#L39-L62","documentation":"BufferMetricProvider logs this warning when reflective creation of the configured BufferMetric class fails with a ReflectiveOperationException, then returns BufferMetric.UNSUPPORTED_BUFFER_METRIC. The metric layer keeps running but buffer statistics are reported as unsupported. It is a graceful-degradation path, not a crash.","triggerScenarios":"Class.forName fails for the buffer metric class name derived from the JVM/version, or the class has no public no-arg constructor, or instantiation throws.","commonSituations":"Running an unusual or newer JVM where the expected MBean buffer pool metric class is absent; agent jar is partially deployed/instrumentation stripped; package rename between Pinpoint versions.","solutions":["Read the chained ReflectiveOperationException to see whether the class was not found or the constructor was missing","Verify the agent jar is intact and contains the expected buffer metric classes (e.g. DefaultBufferMetric)","If the JVM genuinely lacks the buffer-pool MBeans, accept the UNSUPPORTED_BUFFER_METRIC fallback — buffer metrics are simply not collectible on that platform","Upgrade/downgrade Pinpoint agent to a version supporting the target JVM"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"Class<?> c = Class.forName(\"com.navercorp.pinpoint.profiler.context.provider.stat.buffer.BufferMetricProvider\"); // plus verify agent jar integrity: jar tf pinpoint-agent.jar | grep BufferMetric","typeGuard":null,"tryCatchPattern":"try { return bufferMetricConstructor.newInstance(); } catch (ReflectiveOperationException e) { logger.warn(\"BufferMetric initialize fail: {}\", classToLoad); return BufferMetric.UNSUPPORTED_BUFFER_METRIC; }","preventionTips":["Use a Pinpoint agent version tested against your exact JVM major version","Verify agent jar checksums after deployment to catch truncated artifacts","Check whether your JVM exposes the BufferPoolMXBean metrics at all","Treat UNSUPPORTED_BUFFER_METRIC dashboards as a platform signal, not an alert"],"tags":["reflection","metrics","fallback","jmx"],"backgroundTag":"class-not-found","analyzedSha":"744c3d3075e595656abb1ae331ad2c0e4c9eb996","analyzedAt":"2026-09-07T18:48:45.289Z","contentChangedAt":"2026-09-07T18:48:45.289Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}