[jboss-jira] [JBoss JIRA] Created: (JBAS-8369) JBoss AS CPU loop - incorrect synchronization on HashMap?

[Stephen Potter (JIRA)]

JBoss AS CPU loop - incorrect synchronization on HashMap?
---------------------------------------------------------

                 Key: JBAS-8369
                 URL: https://jira.jboss.org/browse/JBAS-8369
             Project: JBoss Application Server
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Web (Tomcat) service
    Affects Versions: JBossAS-5.1.0.GA
         Environment: SUSE Linux 2.6.27.19-5-default #1 SMP 2009-02-28 04:40:21 +0100 x86_64 x86_64 x86_64 GNU/Linux
            Reporter: Stephen Potter
            Assignee: Remy Maucherat


Web application becomes unresponsive.  JBoss java CPU at 340%.  jstack shows 3 JBoss web threads in HashMap.get suggesting that the cause is incorrectly synchronized use of a HashMap.  Extract of stack dump:

"ajp-127.0.0.1-50113-55" daemon prio=10 tid=0x000000004c364800 nid=0x4f1 runnable [0x00007f6f09cd7000]
   java.lang.Thread.State: RUNNABLE
	at java.util.HashMap.get(HashMap.java:303)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:71)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.web.tomcat.service.injection.TomcatInjectionUtils.processDynamicBeanAnnotations(TomcatInjectionUtils.java:59)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processAnnotations(TomcatInjectionContainer.java:407)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processDynamicBeanAnnotations(TomcatInjectionContainer.java:382)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:274)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:265)
	at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:145)
	- locked <0x00007f6f8d353200> (a org.apache.jasper.servlet.JspServletWrapper)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        . . . . . . . . . . . . . 

"ajp-127.0.0.1-50113-15" daemon prio=10 tid=0x000000005caa6800 nid=0x15f2 runnable [0x00007f6f4073d000]
   java.lang.Thread.State: RUNNABLE
	at java.util.HashMap.get(HashMap.java:303)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:71)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.web.tomcat.service.injection.TomcatInjectionUtils.processDynamicBeanAnnotations(TomcatInjectionUtils.java:59)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processAnnotations(TomcatInjectionContainer.java:407)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processDynamicBeanAnnotations(TomcatInjectionContainer.java:382)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:274)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:265)
	at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:145)
	- locked <0x00007f6fd8a886b0> (a org.apache.jasper.servlet.JspServletWrapper)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        . . . . . . . . . . . . . 

"ajp-127.0.0.1-50113-6" daemon prio=10 tid=0x00000000418f0000 nid=0x25d7 runnable [0x00007f6f41045000]
   java.lang.Thread.State: RUNNABLE
	at java.util.HashMap.get(HashMap.java:303)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:71)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.injection.InjectionUtil.collapseXmlMethodInjectors(InjectionUtil.java:92)
	at org.jboss.web.tomcat.service.injection.TomcatInjectionUtils.processDynamicBeanAnnotations(TomcatInjectionUtils.java:59)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processAnnotations(TomcatInjectionContainer.java:407)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.processDynamicBeanAnnotations(TomcatInjectionContainer.java:382)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:274)
	at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:265)
	at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:145)
	- locked <0x00007f6fd40a01b8> (a org.apache.jasper.servlet.JspServletWrapper)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        . . . . . . . . . . . . . 





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