5:39 p.m.
Chasing after another problem I found several blocked task threads, best as I can
determine:
InMemorySessionmanager$SessionImpl.invalidate() is invoked.
This method is synchronized, and the call blocks inside
SesssionListeners.sessionDestroyed() (separate issue there...)
Later, InMemorySessionmanager$SessionImpl.bumpTimeout() is invoked from another thread.
This method is also synchronized, and blocks waiting for invalidate() to complete. As the
first thread is indefinitely blocked inside invalidate(), this second thread also remains
blocked indefinitely.
In my environment it appears to make an existing problem slightly more severe.
Found in 1.1.0, but it looks like it's in both 1.1.7 and the master branch as well.
Using RHEL, Java 7, Wildfly 8.2
invalidate() Thread trace (excerpt):
* (blocked) - sun.misc.Unsafe.park(boolean, long)
* ...
* org.jboss.seam.contexts.ServletLifecycle.endSession(javax.servlet.http.HttpSession)
(line: 187)
*
org.jboss.seam.servlet.SeamListener.sessionDestroyed(javax.servlet.http.HttpSessionEvent)
(line: 59)
*
io.undertow.servlet.core.ApplicationListeners.sessionDestroyed(javax.servlet.http.HttpSession)
(line: 264)
*
io.undertow.servlet.core.SessionListenerBridge.sessionDestroyed(io.undertow.server.session.Session,
io.undertow.server.HttpServerExchange,
io.undertow.server.session.SessionListener$SessionDestroyedReason) (line: 67)
*
io.undertow.server.session.SessionListeners.sessionDestroyed(io.undertow.server.session.Session,
io.undertow.server.HttpServerExchange,
io.undertow.server.session.SessionListener$SessionDestroyedReason) (line: 61)
*
io.undertow.server.session.InMemorySessionManager$SessionImpl.invalidate(io.undertow.server.HttpServerExchange,
io.undertow.server.session.SessionListener$SessionDestroyedReason) (line: 413)
*
io.undertow.server.session.InMemorySessionManager$SessionImpl.invalidate(io.undertow.server.HttpServerExchange)
(line: 399)
* io.undertow.servlet.spec.HttpSessionImpl.invalidate() (line: 197)
* ...
bumpTimeout() Thread trace:
* io.undertow.server.session.InMemorySessionManager$SessionImpl.bumpTimeout() (line:
271)
*
io.undertow.server.session.InMemorySessionManager$SessionImpl.getAttribute(java.lang.String)
(line: 355)
*
io.undertow.servlet.util.SavedRequest.tryRestoreRequest(io.undertow.server.HttpServerExchange,
javax.servlet.http.HttpSession) (line: 124)
*
io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 67)
*
io.undertow.security.handlers.SecurityInitialHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 76)
*
io.undertow.server.handlers.PredicateHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 43)
*
org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 61)
*
io.undertow.server.handlers.PredicateHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 43)
*
io.undertow.server.handlers.PredicateHandler.handleRequest(io.undertow.server.HttpServerExchange)
(line: 43)
*
io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(io.undertow.server.HttpServerExchange,
io.undertow.servlet.handlers.ServletChain,
io.undertow.servlet.handlers.ServletRequestContext, javax.servlet.ServletRequest,
javax.servlet.ServletResponse) (line: 261)
*
io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(io.undertow.server.HttpServerExchange,
io.undertow.servlet.handlers.ServletRequestContext,
io.undertow.servlet.handlers.ServletChain, javax.servlet.DispatcherType) (line: 247)
*
io.undertow.servlet.handlers.ServletInitialHandler.access$000(io.undertow.servlet.handlers.ServletInitialHandler,
io.undertow.server.HttpServerExchange, io.undertow.servlet.handlers.ServletRequestContext,
io.undertow.servlet.handlers.ServletChain, javax.servlet.DispatcherType)
*
io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(io.undertow.server.HttpServerExchange)
(line: 166)
* io.undertow.server.Connectors.executeRootHandler(io.undertow.server.HttpHandler,
io.undertow.server.HttpServerExchange) (line: 197)
* io.undertow.server.HttpServerExchange$1.run() (line: 759)
*
java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker)
(line: 1145)
* java.util.concurrent.ThreadPoolExecutor$Worker.run() (line: 615)
* java.lang.Thread.run() (line: 745)
//EricP
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