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EAP 6 の管理オペレーション read-attribute における JBAS014612: NullPointerException

Solution Verified - Updated -

Issue

ログに以下のエラーが表示されます。

JBAS014612:Operation ("read-attribute") failed - address:([
    ("deployment" => "example.war"),
    ("subsystem" => "web"),
    ("servlet" => "testServlet")
]): java.lang.NullPointerException
    at org.jboss.as.web.WebDeploymentServletDefinition$5.handle(WebDeploymentServletDefinition.java:91)
    at org.jboss.as.web.WebDeploymentServletDefinition$AbstractMetricsHandler$1.execute(WebDeploymentServletDefinition.java:119)
    at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:611)
    at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:489)
    at org.jboss.as.controller.AbstractOperationContext.completeStepInternal(AbstractOperationContext.java:290)

これは何を意味していますか? どんな解決方法がありますか?

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 6.x

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