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

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 Assignee: Shane Bryzak 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)