JBoss EAP server high response times and high CPU with many HttpManagementService threads

Issue

JBoss EAP high response times and high CPU. Many HttpManagementService-threads are running and all high CPU consumer threads are HttpManagementService-threads. An example of one of threads is like this:

"HttpManagementService-threads - 4223" prio=10 tid=0x00007f1d040f8800 nid=0x7596 runnable [0x00007f1ca5b03000]
   java.lang.Thread.State: RUNNABLE
    at java.util.regex.Matcher.appendReplacement(Matcher.java:756)
    at java.util.regex.Matcher.replaceAll(Matcher.java:906)
    at java.lang.String.replace(String.java:2180)
    at org.jboss.as.jpa.hibernate4.management.QueryName.displayable(QueryName.java:187)
    at org.jboss.as.jpa.hibernate4.management.QueryName.<init>(QueryName.java:120)
    at org.jboss.as.jpa.hibernate4.management.QueryName.queryName(QueryName.java:110)
    at org.jboss.as.jpa.hibernate4.management.HibernateStatisticsResource.getQueryNames(HibernateStatisticsResource.java:345)
    at org.jboss.as.jpa.hibernate4.management.HibernateStatisticsResource.hasQuery(HibernateStatisticsResource.java:332)
    at org.jboss.as.jpa.hibernate4.management.HibernateStatisticsResource.hasChild(HibernateStatisticsResource.java:81)
    at org.jboss.as.controller.OperationContextImpl.getAuthorizationResource(OperationContextImpl.java:1168)
    at org.jboss.as.controller.OperationContextImpl.getBasicAuthorizationResponse(OperationContextImpl.java:1126)
    at org.jboss.as.controller.OperationContextImpl.authorize(OperationContextImpl.java:1049)
    at org.jboss.as.controller.OperationContextImpl.authorize(OperationContextImpl.java:845)
    at org.jboss.as.controller.operations.global.ReadResourceHandler.doExecuteInternal(ReadResourceHandler.java:265)
    at org.jboss.as.controller.operations.global.ReadResourceHandler.doExecute(ReadResourceHandler.java:142)
    at org.jboss.as.controller.operations.global.GlobalOperationHandlers$AbstractMultiTargetHandler.execute(GlobalOperationHandlers.java:249)
    at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:601)
    at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:479)
    at org.jboss.as.controller.AbstractOperationContext.completeStepInternal(AbstractOperationContext.java:283)
    at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:278)
    at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:231)
    at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:137)
    at org.jboss.as.controller.ModelControllerImpl$3.execute(ModelControllerImpl.java:437)
    at org.jboss.as.controller.ModelControllerImpl$3.execute(ModelControllerImpl.java:427)
    at org.jboss.as.domain.http.server.DomainApiHandler.processRequest(DomainApiHandler.java:325)
    at org.jboss.as.domain.http.server.DomainApiHandler.doHandle(DomainApiHandler.java:229)
    at org.jboss.as.domain.http.server.DomainApiHandler.handle(DomainApiHandler.java:236)
    at org.jboss.as.domain.http.server.security.SubjectAssociationHandler$1.run(SubjectAssociationHandler.java:69)
    at org.jboss.as.domain.http.server.security.SubjectAssociationHandler$1.run(SubjectAssociationHandler.java:65)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:94)
    at org.jboss.as.domain.http.server.security.SubjectAssociationHandler.handleRequest(SubjectAssociationHandler.java:65)
    at org.jboss.as.domain.http.server.security.SubjectAssociationHandler.handle(SubjectAssociationHandler.java:59)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:78)
    at org.jboss.sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:69)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:81)
    at org.jboss.sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:710)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:78)
    at org.jboss.as.domain.http.server.RealmReadinessFilter.doFilter(RealmReadinessFilter.java:47)
    at org.jboss.as.domain.http.server.DmrFailureReadinessFilter.doFilter(DmrFailureReadinessFilter.java:45)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:81)
    at org.jboss.sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:682)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
    at org.jboss.threads.JBossThread.run(JBossThread.java:122)