Ivan Radovanovic wrote: > Although this dead lock problem continues to potentially exists it seems > that problem is after all OS specific - there is some weird behavior of > fam/gamin reporting that bin/*.dll files are changed, causing ASP.Net > runtime trying to restart application, while at the same time trying to > compile *.aspx, *.ascx etc. The issue might be in FAM FileSystemWatcher backend then.
> Maybe deadlock can occur in normal conditions too (servicing some > request that would need compiling of some control/page that is not > compiled yet and replacing something in bin directory at the same time), > but that should be rare enough :-) The BuildManager in 2.4 has some bugs indeed, which in certain cases can lead to deadlocks (it's, among others, related to recursive dependencies between application files). For that reason I rewrote BuildManager for 2.6+ - if the problem you're seeing turns out to be an issue with more than few environments, I can just copy the new code to 2.4 branch for a future release. If you can come up with a test case that triggers the issue on your system, then please file a bug report and attach the testcase including OS/environment details. marek > > Regards > > Ivan Radovanovic napisa: >> Hello, I am experiencing weird deadlock in .net applications running >> latest release version of mono (2.4.2.3) on FreeBSD (I don't think it is >> OS specific, and it doesn't show all the times, but still often enough >> so I can trace it) >> >> Stack from thread 1: >> at >> System.Web.Compilation.BuildManager.RemoveVirtualPathFromCaches(System.Web.VirtualPath >> >> virtualPath) >> at >> System.Web.Compilation.BuildManager.OnVirtualPathChanged(System.String >> key, System.Object value, CacheItemRemovedReason removedReason) >> at System.Web.Caching.Cache.InvokePrivateCallbacks() >> at System.Web.HttpRuntime.ShutdownAppDomain(System.Object args) >> ==================================================================== >> Stack from thread 2: >> at System.Web.Caching.Cache.Add(System.String key, System.Object >> value, System.Web.Caching.CacheDependency dependencies, DateTime >> absoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority >> priority, System.Web.Caching.CacheItemRemovedCallback onRemoveCallback) >> at System.Web.Compilation.BuildManager.AddToCache(System.String >> virtualPath, System.Web.Compilation.BuildProvider bp) >> at >> System.Web.Compilation.BuildManager.GenerateAssembly(System.Web.Compilation.AssemblyBuilder >> >> abuilder, System.Collections.Generic.List`1 buildItems, >> System.Web.VirtualPath virtualPath, BuildKind buildKind) >> at >> System.Web.Compilation.BuildManager.BuildAssembly(System.Web.VirtualPath >> virtualPath) >> at System.Web.Compilation.BuildManager.GetCompiledType(System.String >> virtualPath) >> at System.Web.Compilation.AspComponentFoundry+TagNameFoundry.LoadType() >> at >> System.Web.Compilation.AspComponentFoundry+TagNameFoundry.GetType(System.String >> >> componentName, System.String ByRef source, System.String ByRef ns) >> at >> System.Web.Compilation.AspComponentFoundry.CreateComponent(System.Web.Compilation.Foundry >> >> foundry, System.String tagName, System.String prefix, System.String tag) >> at >> System.Web.Compilation.AspComponentFoundry.GetComponent(System.String >> tagName) >> at System.Web.UI.RootBuilder.GetChildControlType(System.String >> tagName, IDictionary attribs) >> at System.Web.UI.ControlBuilder.CreateSubBuilder(System.String tagid, >> System.Collections.Hashtable atts, System.Type childType, >> System.Web.UI.TemplateParser parser, ILocation location) >> at System.Web.Compilation.AspGenerator.ProcessTag(ILocation location, >> System.String tagid, System.Web.Compilation.TagAttributes atts, TagType >> tagtype, Boolean ByRef ignored) >> at System.Web.Compilation.AspGenerator.TagParsed(ILocation location, >> TagType tagtype, System.String tagid, >> System.Web.Compilation.TagAttributes attributes) >> at System.Web.Compilation.AspParser.OnTagParsed(TagType tagtype, >> System.String id, System.Web.Compilation.TagAttributes attributes) >> at System.Web.Compilation.AspParser.Parse() >> at System.Web.Compilation.AspGenerator.Parse(System.IO.TextReader >> reader, System.String filename, Boolean doInitParser) >> at System.Web.Compilation.GenericBuildProvider`1.Parse() >> at System.Web.Compilation.GenericBuildProvider`1.get_CodeCompilerType() >> at >> System.Web.Compilation.BuildManager.GetCodeDomProviderType(System.Web.Compilation.BuildProvider >> >> provider) >> at >> System.Web.Compilation.BuildManager+BuildItem..ctor(System.Web.Compilation.BuildProvider >> >> provider) >> at >> System.Web.Compilation.BuildManager.LoadBuildProviders(System.Web.VirtualPath >> >> virtualPath, System.String virtualDir, >> System.Collections.Generic.Dictionary`2 vpCache, BuildKind ByRef kind, >> System.String ByRef assemblyBaseName) >> at >> System.Web.Compilation.BuildManager.BuildAssembly(System.Web.VirtualPath >> virtualPath) >> at System.Web.Compilation.BuildManager.GetCompiledType(System.String >> virtualPath) >> at System.Web.Compilation.AspComponentFoundry+TagNameFoundry.LoadType() >> at >> System.Web.Compilation.AspComponentFoundry+TagNameFoundry.GetType(System.String >> >> componentName, System.String ByRef source, System.String ByRef ns) >> at >> System.Web.Compilation.AspComponentFoundry.CreateComponent(System.Web.Compilation.Foundry >> >> foundry, System.String tagName, System.String prefix, System.String tag) >> at >> System.Web.Compilation.AspComponentFoundry.GetComponent(System.String >> tagName) >> at System.Web.UI.RootBuilder.GetChildControlType(System.String >> tagName, IDictionary attribs) >> at System.Web.UI.ControlBuilder.CreateSubBuilder(System.String tagid, >> System.Collections.Hashtable atts, System.Type childType, >> System.Web.UI.TemplateParser parser, ILocation location) >> at System.Web.Compilation.AspGenerator.ProcessTag(ILocation location, >> System.String tagid, System.Web.Compilation.TagAttributes atts, TagType >> tagtype, Boolean ByRef ignored) >> at System.Web.Compilation.AspGenerator.TagParsed(ILocation location, >> TagType tagtype, System.String tagid, >> System.Web.Compilation.TagAttributes attributes) >> at System.Web.Compilation.AspParser.OnTagParsed(TagType tagtype, >> System.String id, System.Web.Compilation.TagAttributes attributes) >> at System.Web.Compilation.AspParser.Parse() >> at System.Web.Compilation.AspGenerator.Parse(System.IO.TextReader >> reader, System.String filename, Boolean doInitParser) >> at System.Web.Compilation.GenericBuildProvider`1.Parse() >> at System.Web.Compilation.GenericBuildProvider`1.get_CodeCompilerType() >> at >> System.Web.Compilation.BuildManager.GetCodeDomProviderType(System.Web.Compilation.BuildProvider >> >> provider) >> at >> System.Web.Compilation.BuildManager+BuildItem..ctor(System.Web.Compilation.BuildProvider >> >> provider) >> at >> System.Web.Compilation.BuildManager.LoadBuildProviders(System.Web.VirtualPath >> >> virtualPath, System.String virtualDir, >> System.Collections.Generic.Dictionary`2 vpCache, BuildKind ByRef kind, >> System.String ByRef assemblyBaseName) >> at >> System.Web.Compilation.BuildManager.BuildAssembly(System.Web.VirtualPath >> virtualPath) >> at System.Web.Compilation.BuildManager.GetCompiledType(System.String >> virtualPath) >> at >> System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(System.String >> >> virtualPath, System.Type requiredBaseType) >> at System.Web.UI.PageParser.GetCompiledPageInstance(System.String >> virtualPath, System.String inputFile, System.Web.HttpContext context) >> at System.Web.UI.PageHandlerFactory.GetHandler(System.Web.HttpContext >> context, System.String requestType, System.String url, System.String path) >> at System.Web.HttpApplication.GetHandler(System.Web.HttpContext >> context, System.String url, Boolean ignoreContextHandler) >> at System.Web.HttpApplication.GetHandler(System.Web.HttpContext >> context, System.String url) >> at System.Web.HttpApplication+<Pipeline>c__Iterator2.MoveNext() >> at System.Web.HttpApplication.Tick() >> at System.Web.HttpApplication.Start(System.Object x) >> at >> System.Web.HttpApplication.System.Web.IHttpHandler.ProcessRequest(System.Web.HttpContext >> >> context) >> at System.Web.HttpRuntime.Process(System.Web.HttpWorkerRequest req) >> at System.Web.HttpRuntime.RealProcessRequest(System.Object o) >> at System.Web.HttpRuntime.ProcessRequest(System.Web.HttpWorkerRequest >> wr) >> at Mono.WebServer.MonoWorkerRequest.ProcessRequest() >> at >> Mono.WebServer.BaseApplicationHost.ProcessRequest(Mono.WebServer.MonoWorkerRequest >> >> mwr) >> at Mono.WebServer.XSPApplicationHost.ProcessRequest(Int32 reqId, >> Int64 localEPAddr, Int32 localEPPort, Int64 remoteEPAdds, Int32 >> remoteEPPort, System.String verb, System.String path, System.String >> queryString, System.String protocol, System.Byte[] inputBuffer, >> System.String redirect, IntPtr socket, Mono.WebServer.SslInformations ssl) >> at Mono.WebServer.XSPWorker.RunInternal(System.Object state) >> =============================================================================== >> >> >> >> As you can see there is deadlock between >> System.Web.Compilation.BuildManager.AddToCache (thread 2, second item) >> and System.Web.Compilation.BuildManager.GenerateAssembly (both using >> lock (buildCacheLock)) and between System.Web.Caching.Cache.Add and >> System.Web.Caching.Cache.InvokePrivateCallbacks() (both using lock(cache)) >> >> I am curious if someone is working on this bug (is this known bug?) or I >> should try to fix it myself? >> >> Best regards, >> Ivan >> > _______________________________________________ > Mono-devel-list mailing list > Mono-devel-list@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/mono-devel-list > _______________________________________________ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
