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Created attachment 16953 [details] Ide log file Description of Problem: Xamarin Studio 6.0.1 (build 9) Sporadic Build Error. Everything is building fine then sporadically will get the following series of errors. Once this happens (a couple of times a day so far) the only way to resolve it is to close the project and re-open it, then builds work fine. Please note that I have attached the 'Ide' log file. *************************** INITIALLY GET THIS ERROR... *************************** Error: /Users/msivers/SystemsTFS/MobileApps/Main/Apps/Next.Droid/Next.Droid.csproj: ../../Shared/Next.Shared/Next.Shared.projitems: Project file could not be imported, it was being imported by /Users/msivers/SystemsTFS/MobileApps/Main/Apps/Next.Droid/Next.Droid.csproj: Out of memory (Next.Droid) Building: Next.Droid (Debug) Build started 09/08/2016 11:45:55. __________________________________________________ Project "/Users/msivers/SystemsTFS/MobileApps/Main/Shared/Next.Localization/Next.Localization.csproj" (Build target(s)): Target PrepareForBuild: Configuration: Debug Platform: AnyCPU Target GenerateSatelliteAssemblies: No input files were specified for target GenerateSatelliteAssemblies, skipping. Target GenerateTargetFrameworkMonikerAttribute: Skipping target "GenerateTargetFrameworkMonikerAttribute" because its outputs are up-to-date. Target CoreCompile: Skipping target "CoreCompile" because its outputs are up-to-date. Done building project "/Users/msivers/SystemsTFS/MobileApps/Main/Shared/Next.Localization/Next.Localization.csproj". Build succeeded. 0 Warning(s) 0 Error(s) Time Elapsed 00:00:00.0514500 ---------------------- Done ---------------------- Build: 1 error, 0 warnings *********************************************************************** I THEN GET THE FOLLOWING ERROR FOR EVERY SUBSEQUENT ATTEMPT TO BUILD... *********************************************************************** /Users/msivers/SystemsTFS/MobileApps/Main/Shared/Next.Localization/Next.Localization.csproj(1,1): Error: Unknown MSBuild failure. Please try building the project again (Next.Localization) Building: Next.Droid (Debug) ---------------------- Done ---------------------- Build: 1 error, 0 warnings
I have updated Xamarin Studio to latest 6.0.2 (build 73) and still have this happening sporadically.
For reference, all our developers on Xamarin Studio (5) have experience this issue. We are experiencing this issue on average 1-2 times an hour and as the only workaround is to reload the solution, it is becoming a significant frustration. Regards.
Same issue here - Error executing task LinkAssemblies: Out of memory .. on initial build, all subsequent builds from this point show... Error Unknown MSBuild failure. Please try building the project again I've found that mono-sgen32 was holding onto 3GB of memory, killing that process and the error went away. Restarting Xamarin Studio has the same effect and fixes the problem. Happening multiple times per hour on 6.0.2 build 73
I am experiencing this as well on 6.1 (alpha channel). It's the 5th time today that I've had to restart XS. XS Version 6.1 (build 5308) Mono 4.6.0 (mono-4.6.0-branch/0cb79a3) (64-bit) If I look at activity monitor, I can see: Main XS Process: 1.34GB mono-sgen32 child process: 3.11GB The child process is presumably the MSBuild process? It has hundreds of open assembly file handles (we have dozens of projects in the solution, targeting *every* Xamarin framework (Android, iOS, Mac Mobile, Mac Desktop, etc) - this results in basically every single framework assembly from every single framework being opened by the process). I assume that `mono-sgen32` is a 32 bit process, and so it really might be out of memory (approaching 4GB, the runtime/GC probably hits that limit even though the OS indicates slightly less physical memory used). For starters, this should probably be a 64 bit process? However, something is definitely leaking. It takes maybe 20-30 builds for the limit to be hit. It manifests as many "Unknown MSBuild failure. Please try building the project again" errors (with nothing of note in the actual build log). These errors are also accompanied with a generic "Out of memory" and "Error executing task MSBuild: Out of memory" errors in the error pane. In the Ide.log we can see the following, presumably related: ERROR [2016-08-12 15:32:05Z]: RunTarget failed System.Exception: MSBuild operation failed ---> System.NullReferenceException: Object reference not set to an instance of an object at System.Xml.XmlEncodedRawTextWriter.FlushBuffer () [0x0009d] in <filename unknown>:0 at System.Xml.XmlEncodedRawTextWriter.Close () [0x00000] in <filename unknown>:0 at System.Xml.XmlRawWriter.Close (System.Xml.WriteState currentState) [0x00000] in <filename unknown>:0 at System.Xml.XmlWellFormedWriter.Close () [0x000b9] in <filename unknown>:0 at System.Xml.XmlWriter.Dispose (System.Boolean disposing) [0x00012] in <filename unknown>:0 at System.Xml.XmlWriter.Dispose () [0x00000] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.GenerateSolutionConfigurationContents (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations) [0x0011e] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.SetupProject (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations) [0x00002] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder+<Run>c__AnonStorey0.<>m__0 () [0x00000] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.BuildEngine.STARunner () [0x00010] in <filename unknown>:0 [MVID] 3a25cb2f0bd44e29b16f27d9ece78a5d 6,7,8,9 [MVID] 6f5b897a4e79420ea17c734c0583d6a2 0,1,2,3,4,5 --- End of inner exception stack trace --- Server stack trace: at MonoDevelop.Projects.MSBuild.BuildEngine.RunSTA (System.Int32 taskId, System.Threading.ThreadStart ts) [0x00117] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.Run (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations, MonoDevelop.Projects.MSBuild.ILogWriter logWriter, MonoDevelop.Projects.MSBuild.MSBuildVerbosity verbosity, System.String[] runTargets, System.String[] evaluateItems, System.String[] evaluateProperties, System.Collections.Generic.Dictionary`2[TKey,TValue] globalProperties, System.Int32 taskId) [0x00049] in <filename unknown>:0 at (wrapper managed-to-native) System.Runtime.Remoting.RemotingServices:InternalExecute (System.Reflection.MethodBase,object,object[],object[]&) at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage (System.MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg) [0x000ca] in <filename unknown>:0 [MVID] 3a25cb2f0bd44e29b16f27d9ece78a5d 0,1 [MVID] 7747cf446af449e194e4b4e70d85e773 3 Exception rethrown at [0]: at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_remoting_wrapper (intptr,intptr) at (wrapper remoting-invoke) MonoDevelop.Projects.MSBuild.ProjectBuilder:Run (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[],MonoDevelop.Projects.MSBuild.ILogWriter,MonoDevelop.Projects.MSBuild.MSBuildVerbosity,string[],string[],string[],System.Collections.Generic.Dictionary`2<string, string>,int) at MonoDevelop.Projects.MSBuild.RemoteProjectBuilder+<Run>c__AnonStorey4.<>m__0 () [0x0000b] in /Users/builder/data/lanes/3509/fc88ad6d/source/monodevelop/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.MSBuild/RemoteProjectBuilder.cs:241 [MVID] 85b319cd37a34a86a692143b44331091 2 ERROR [2016-08-12 15:32:05Z]: RunTarget failed System.Exception: MSBuild operation failed ---> System.NullReferenceException: Object reference not set to an instance of an object at System.Xml.XmlEncodedRawTextWriter.FlushBuffer () [0x0009d] in <filename unknown>:0 at System.Xml.XmlEncodedRawTextWriter.Close () [0x00000] in <filename unknown>:0 at System.Xml.XmlRawWriter.Close (System.Xml.WriteState currentState) [0x00000] in <filename unknown>:0 at System.Xml.XmlWellFormedWriter.Close () [0x000b9] in <filename unknown>:0 at System.Xml.XmlWriter.Dispose (System.Boolean disposing) [0x00012] in <filename unknown>:0 at System.Xml.XmlWriter.Dispose () [0x00000] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.GenerateSolutionConfigurationContents (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations) [0x0011e] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.SetupProject (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations) [0x00002] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder+<Run>c__AnonStorey0.<>m__0 () [0x00000] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.BuildEngine.STARunner () [0x00010] in <filename unknown>:0 [MVID] 3a25cb2f0bd44e29b16f27d9ece78a5d 6,7,8,9 [MVID] 6f5b897a4e79420ea17c734c0583d6a2 0,1,2,3,4,5 --- End of inner exception stack trace --- Server stack trace: at MonoDevelop.Projects.MSBuild.BuildEngine.RunSTA (System.Int32 taskId, System.Threading.ThreadStart ts) [0x00117] in <filename unknown>:0 at MonoDevelop.Projects.MSBuild.ProjectBuilder.Run (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[] configurations, MonoDevelop.Projects.MSBuild.ILogWriter logWriter, MonoDevelop.Projects.MSBuild.MSBuildVerbosity verbosity, System.String[] runTargets, System.String[] evaluateItems, System.String[] evaluateProperties, System.Collections.Generic.Dictionary`2[TKey,TValue] globalProperties, System.Int32 taskId) [0x00049] in <filename unknown>:0 at (wrapper managed-to-native) System.Runtime.Remoting.RemotingServices:InternalExecute (System.Reflection.MethodBase,object,object[],object[]&) at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage (System.MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg) [0x000ca] in <filename unknown>:0 [MVID] 3a25cb2f0bd44e29b16f27d9ece78a5d 0,1 [MVID] 7747cf446af449e194e4b4e70d85e773 3 Exception rethrown at [0]: at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_remoting_wrapper (intptr,intptr) at (wrapper remoting-invoke) MonoDevelop.Projects.MSBuild.ProjectBuilder:Run (MonoDevelop.Projects.MSBuild.ProjectConfigurationInfo[],MonoDevelop.Projects.MSBuild.ILogWriter,MonoDevelop.Projects.MSBuild.MSBuildVerbosity,string[],string[],string[],System.Collections.Generic.Dictionary`2<string, string>,int) at MonoDevelop.Projects.MSBuild.RemoteProjectBuilder+<Run>c__AnonStorey4.<>m__0 () [0x0000b] in /Users/builder/data/lanes/3509/fc88ad6d/source/monodevelop/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.MSBuild/RemoteProjectBuilder.cs:241 [MVID] 85b319cd37a34a86a692143b44331091 2
"wall clock" sampling of mono-sgen32 child process after a build: Build # Memory Used: 1 255MB 2 393MB 3 662MB 4 698MB 5 987MB 6 1.07GB 7 1.30GB 8 1.27GB 9 1.58GB 10 1.76GB 11 1.87GB 12 1.97GB 13 2.02GB 14 2.32GB 15 2.41GB 16 2.76GB 17 2.80GB 18 3.07GB 19 * 3.10GB The 19th build failed with OOM. It's interesting that it seems like there's a big jump roughly every _other_ build. XS itself also grows about 80MB/build.
I also experience this, especially annoying as I also have to do a clean/rebuild after reload as fody onpropertychange generates an exception otherwise. Its done it for all 6.X builds of xamarin studio.
Possibly duplicated by bug #43505
*** Bug 45005 has been marked as a duplicate of this bug. ***
It's a leak in Xamarin.Android. It doesn't happen on XA master. The fix is probably https://github.com/xamarin/xamarin-android/commit/16d65fab5e5c8606c727bea804bb40d105745d13 or https://github.com/xamarin/xamarin-android/commit/fa61551b9007be54c0163f52f5c7bb34d0d4d0ee, or both. It needs to be backported to the cycle8 branch.
Fixed in version 6.2.0.812 (master) Author: Lluis Sanchez Commit: f6e5b6a4796687245fa628ba952be719677ed1f8 (mono/monodevelop)
Fixed in version 6.1.2.29 (cycle8) Author: Lluis Sanchez Commit: 3dbc9bdffb352d0d14d8260a0d897c325c26e4e1 (mono/monodevelop)
Reopening since the issue is not 100% fixed. The error will still happen, but it won't leave the project in an unbuildable state anymore.
*** Bug 44556 has been marked as a duplicate of this bug. ***
We've taken the majority of these patches in C8SR1, which will provide a net improvement in experience. Moving this bug to the Android product and Cycle9 milestone to track the Cecil 0.10 update which is presumed to resolve this issue.
Closing as FIXED because, to the best of my current knowledge, Cycle 9/Xamarin.Android 7.1 doesn't contain the specified memory leak.
I could not reproduce the issue. Do you have any sample to attach where you are able to reproduce this bug? Thanks
I can no longer reproduce this issue in C9.
Marking as Verified/Fixed as per comment #19.
*** Bug 43505 has been marked as a duplicate of this bug. ***