概要 Tomcat (6.0.36、7.0.14以降)では、処理に時間がかかっているリクエストを検知することができます。server.xmlのHost要素内に、次のようにStuckThreadDetectionValveを定義すると、 <Valve className="org.apache.catalina.valves.StuckThreadDetectionValve" threshold="300" /> 05-Nov-2015 20:26:09.857 WARNING [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.valves.StuckThreadDetectionValve.notifyStuckThreadDetected Thread "http-nio-18080
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