0 Replies Latest reply on Mar 21, 2018 2:02 PM by Mi Gr

    Multiple threads consuming high CPU load

    Mi Gr Newbie

      Hi everybody,

       

      on our server running Wildfly-10.1.0.Final we're observing a weird behaviour. About once a day there are two or three threads consuming between 25-30% CPU load each and they keep running forever.

      It's not clear what causes those threads to "go crazy" and what they are doing. The stack trace below doesn't really give any clue (at least not to me). Does anyone have an idea how to get to the root of the problem?

       

      Thanks very much in advance!

       

      Stack Trace

      default task-56 [366] (RUNNABLE)

         org.xnio.conduits.StreamSinkChannelWrappingConduit.awaitWritable line: 99

         org.xnio.conduits.ConduitStreamSinkChannel.awaitWritable line: 134

         io.undertow.channels.DetachableStreamSinkChannel.awaitWritable line: 87

         io.undertow.server.HttpServerExchange$WriteDispatchChannel.awaitWritable line: 1962

         org.xnio.channels.Channels.writeBlocking line: 154

         io.undertow.servlet.spec.ServletOutputStreamImpl.write line: 283

         io.undertow.io.BlockingSenderImpl.writeBuffer line: 190

         io.undertow.io.BlockingSenderImpl.send line: 71

         io.undertow.server.handlers.resource.CachedResource.serve line: 187

         io.undertow.servlet.handlers.DefaultServlet.serveFileBlocking line: 332

         io.undertow.servlet.handlers.DefaultServlet.doGet line: 180

         javax.servlet.http.HttpServlet.service line: 687

         javax.servlet.http.HttpServlet.service line: 790

         io.undertow.servlet.handlers.ServletHandler.handleRequest line: 85

         io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest line: 62

         io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest line: 36

         org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest line: 78

         io.undertow.server.handlers.PredicateHandler.handleRequest line: 43

         io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest line: 131

         io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest line: 57

         io.undertow.server.handlers.PredicateHandler.handleRequest line: 43

         io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest line: 53

         io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest line: 46

         io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest line: 64

         io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest line: 59

         io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest line: 60

         io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest line: 77

         io.undertow.security.handlers.NotificationReceiverHandler.handleRequest line: 50

         io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest line: 43

         io.undertow.server.handlers.PredicateHandler.handleRequest line: 43

         org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest line: 61

         io.undertow.server.handlers.PredicateHandler.handleRequest line: 43

         io.undertow.server.handlers.PredicateHandler.handleRequest line: 43

         io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest line: 292

         io.undertow.servlet.handlers.ServletInitialHandler.access$100 line: 81

         io.undertow.servlet.handlers.ServletInitialHandler$2.call line: 138

         io.undertow.servlet.handlers.ServletInitialHandler$2.call line: 135

         io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call line: 48

         io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call line: 43

         io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call line: 44

         io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call line: 44

         io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call line: 44

         io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call line: 44

         io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call line: 44

         io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest line: 272

         io.undertow.servlet.handlers.ServletInitialHandler.access$000 line: 81

         io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest line: 104

         io.undertow.server.Connectors.executeRootHandler line: 202

         io.undertow.server.HttpServerExchange$1.run line: 805

         java.util.concurrent.ThreadPoolExecutor.runWorker line: 1142

         java.util.concurrent.ThreadPoolExecutor$Worker.run line: 617

         java.lang.Thread.run line: 745