[seam-issues] [JBoss JIRA] Created: (JBSEAM-4697) SubscriptionRegistry.subscribe can cause thread to freeze

Mark Torres (JIRA) jira-events at lists.jboss.org
Tue Aug 24 19:39:11 EDT 2010


SubscriptionRegistry.subscribe can cause thread to freeze
---------------------------------------------------------

                 Key: JBSEAM-4697
                 URL: https://jira.jboss.org/browse/JBSEAM-4697
             Project: Seam
          Issue Type: Bug
          Components: Remoting
    Affects Versions: 2.1.2.GA
         Environment: ubuntu hardy, j2se 64-bit build 1.6.0_17-b04, jboss 4.2.3
            Reporter: Mark Torres


We ran into an issue where we got really high cpu usage on one instance of our application. Upon inspection in yourkit profiler, we found that the following threads we're consuming all the cpu(see stacktraces below).

Upon googling, we saw several posts where concurrent access to hashmap can cause it to enter into an infinite loop.
http://lightbody.net/blog/2005/07/hashmapget_can_cause_an_infini.html

Subscription registry is using a HashMap and HashSet(for user tokens) below the covers, so I think this issue can be fixed by just using ConcurrentHashMap and ConcurrentHashSet respectively.

  Thread: ajp-172.17.8.20-8209-2 : priority:5, demon:true, threadId:228, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) 



  Thread: ajp-172.17.8.20-8209-6 : priority:5, demon:true, threadId:279, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
                org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
                org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
                org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495) 


    Thread: ajp-172.17.8.20-8209-10 : priority:5, demon:true, threadId:5336, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) 


 Thread: ajp-172.17.8.20-8209-18 : priority:5, demon:true, threadId:10515, threadState:RUNNABLE, lockName:null

                java.util.HashMap.transfer(HashMap.java:527)
                java.util.HashMap.resize(HashMap.java:506)
                java.util.HashMap.addEntry(HashMap.java:810)
                java.util.HashMap.put(HashMap.java:416)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) 



   Thread: ajp-172.17.8.20-8209-21 : priority:5, demon:true, threadId:10518, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) 



   Thread: ajp-172.17.8.20-8209-26 : priority:5, demon:true, threadId:10523, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) 



   Thread: ajp-172.17.8.20-8209-29 : priority:5, demon:true, threadId:16450, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 


  Thread: ajp-172.17.8.20-8209-35 : priority:5, demon:true, threadId:26542, threadState:RUNNABLE, lockName:null

                java.util.HashMap.put(HashMap.java:405)
                org.jboss.seam.remoting.messaging.SubscriptionRegistry.subscribe(SubscriptionRegistry.java:121)
                org.jboss.seam.remoting.messaging.SubscriptionRequest.subscribe(SubscriptionRequest.java:22)
                org.jboss.seam.remoting.SubscriptionHandler.handle(SubscriptionHandler.java:68)
                org.jboss.seam.remoting.Remoting.getResource(Remoting.java:111)
                org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
                org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
                org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
                org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) 

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