Device either A) builds and runs successfully or B) fails and shows a meaningful error message indicating some sort of issue on the developer's part
Device builds android project and dependencies successfully and fails upon deployment with the following error message:
Severity Code Description Project File Line Suppression State
Error Command too long
at Mono.AndroidTools.Adb.AdbClient.GetCommandBuffer(String command) in C:\A\1\36\s\External\androidtools\Mono.AndroidTools\Adb\AdbClient.cs:line 258
at Mono.AndroidTools.Adb.AdbClient.BeginWriteCommand(String command, AsyncCallback callback, Object state) in C:\A\1\36\s\External\androidtools\Mono.AndroidTools\Adb\AdbClient.cs:line 227
at Mono.AndroidTools.Adb.AdbClient.BeginWriteCommandWithStatus(String command, AsyncCallback callback, Object state) in C:\A\1\36\s\External\androidtools\Mono.AndroidTools\Adb\AdbClient.cs:line 274
at System.Threading.Tasks.TaskFactory`1.FromAsyncImpl[TArg1](Func`4 beginMethod, Func`2 endFunction, Action`1 endAction, TArg1 arg1, Object state, TaskCreationOptions creationOptions)
at Mono.AndroidTools.Internal.AdbClientTaskExtensions.WriteCommandWithStatusAsync(AdbClient client, String command, TaskCreationOptions options) in C:\A\1\36\s\External\androidtools\Mono.AndroidTools\Internal\AdbClientTaskExtensions.cs:line 62
at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass62_0.<RunShellCommand>b__0(Task t) in C:\A\1\36\s\External\androidtools\Mono.AndroidTools\AndroidDevice.cs:line 403
at System.Threading.Tasks.ContinuationResultTaskFromTask`1.InnerInvoke()
at System.Threading.Tasks.Task.Execute() 0
Microsoft Visual Studio Enterprise 2019
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Some background on this. For d16-9 we had to completely re-write the fast deployment system, This is because API 30 no longer supports things the old fast deployment system was relying on. You can see the release notes at [1].
The key feature is the run-as shell command. Somehow we are generating an adb command which is longer that 1024 characters.
It wold be helpful to have the diagnostic output for the error though if you can provide it. Its possible we might be able to work around any restrictions on the device. If you run the following command from a Developer Command Prompt
msbuild <your android csproj> /restore /t:Install /bl /p: _FastDeploymentDiagnosticLogging=true
the post the msbuild.binlog ( you might have to zip it first). That will help us diagnose the problem your particular device is having.
To work around this issue you can disable fast deployment in the IDE or by setting <EmbedAssembliesIntoApk> to false in the csproj.
[1] https://docs.microsoft.com/en-us/xamarin/android/release-notes/11/11.2#rewritten-fast-deployment-system
@ptabatt do you have a build log I could take a look at as mentioned in https://github.com/xamarin/xamarin-android/issues/5710#issuecomment-793008449.
I think I have found the issue, but I'd like to add a unit test which will replicate the problem.
@ptabatt can you do that log again please, that one had not changes so it skipped all the targets. So uninstall the app from the device and run the command again, it should reproduce the error.
Two things:
1) Does this command write to any log file anywhere I can find in my solution? I can't find it; I'm copying and pasting from the dev console and it's too long.
2) The command only builds the project and you're having me send you the build log, but the error is on deployment. Is this intentional?
@ptabatt the /t:Install target does the installation/deployment. So it should do the deployment
@ptabatt the command
msbuild <your android csproj> /restore /t:Install /bl /p:_FastDeploymentDiagnosticLogging=true
will produce a msbuild.binlog file in the same directory that you run it from. It will build the app and send it to the attached device/emulator so it should contain all the data we need.
I see, thanks. Sorry for the delay.
@ptabatt
That was great thanks, but it didn't have the error you reported? Does that error only show up in the IDE or have you seen it on the command line as well?
Only saw it on the IDE. I never build/deploy my app this way
Can you use this VS extension to grab a log from inside the IDE?
https://marketplace.visualstudio.com/items?itemName=VisualStudioProductTeam.ProjectSystemTools
Hit this play button to start recording, then cause the issue:

And you should be able to right-click to save a failing log, thanks!
This started for me after updating to 11.2.0.21 this morning (from whatever the previous 11.2.* stable release was, I'm not running any pre-releases). I'm using macOS 11.2.3 w/ JetBrains Rider (and VSMac for updating components). Is there anything I can provide to help?

@mportune-bw you can try @dellis1972's example to get a log at the command-line: https://github.com/xamarin/xamarin-android/issues/5710#issuecomment-794303827
If it only happens in VS Mac (your screenshot looks like Mac), maybe just enable diagnostic logging and see if you can save the log to a file.
You might also put <_FastDeploymentDiagnosticLogging>true</_FastDeploymentDiagnosticLogging> directly in your .csproj file so you always get extra logging for Fast Deployment.
Here's the msbuild output. Let me know if this has what you need or if I need to try something else.
Ok, that's it, this command is too long:
DEBUG RunShellCommand emulator-5554 "run-as" "com.x8bit.bitwarden" "mkdir" "-p" "files/.__override__" "files/.__override__/sl" "files/.__override__/sk" "files/.__override__/zh-Hans" "files/.__override__/zh-Hant" "files/.__override__/pl" "files/.__override__/vi" "files/.__override__/sv" "files/.__override__/he" "files/.__override__/be" "files/.__override__/da" "files/.__override__/ja" "files/.__override__/el" "files/.__override__/lv" "files/.__override__/it" "files/.__override__/ca" "files/.__override__/cs" "files/.__override__/ru" "files/.__override__/en-GB" "files/.__override__/ro" "files/.__override__/en-IN" "files/.__override__/uk" "files/.__override__/sr" "files/.__override__/pt-PT" "files/.__override__/si" "files/.__override__/ml" "files/.__override__/hr" "files/.__override__/pt-BR" "files/.__override__/hu" "files/.__override__/nl" "files/.__override__/bg" "files/.__override__/bn" "files/.__override__/af" "files/.__override__/nb" "files/.__override__/hi" "files/.__override__/de" "files/.__override__/ko" "files/.__override__/fi" "files/.__override__/id" "files/.__override__/fr" "files/.__override__/es" "files/.__override__/et" "files/.__override__/fa" "files/.__override__/th" "files/.__override__/tr". [45ms]
These are the bin logs from the tool @jonathanpeppers mentioned
Hi, I am facing the same issue with latest stable Visual Studio for Mac and its dependencies: is there any feasible workaround in the meantime? I have Fast Assembly Deployment disabled, although the Deploying to Device panel shows the following:
Install FastDeployment Tools
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : Command too long
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at Mono.AndroidTools.Adb.AdbClient.GetCommandBuffer (System.String command) [0x0006d] in /Users/builder/azdo/_work/278/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/Adb/AdbClient.cs:265
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at Mono.AndroidTools.Adb.AdbClient.BeginWriteCommand (System.String command, System.AsyncCallback callback, System.Object state) [0x00006] in /Users/builder/azdo/_work/278/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/Adb/AdbClient.cs:227
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at Mono.AndroidTools.Adb.AdbClient.BeginWriteCommandWithStatus (System.String command, System.AsyncCallback callback, System.Object state) [0x0000a] in /Users/builder/azdo/_work/278/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/Adb/AdbClient.cs:275
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncImpl[TArg1] (System.Func`4[T1,T2,T3,TResult] beginMethod, System.Func`2[T,TResult] endFunction, System.Action`1[T] endAction, TArg1 arg1, System.Object state, System.Threading.Tasks.TaskCreationOptions creationOptions) [0x000f9] in /Users/builder/jenkins/workspace/build-package-osx-mono/2020-02/external/bockbuild/builds/mono-x64/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/FutureFactory.cs:919
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at System.Threading.Tasks.TaskFactory.FromAsync[TArg1] (System.Func`4[T1,T2,T3,TResult] beginMethod, System.Action`1[T] endMethod, TArg1 arg1, System.Object state, System.Threading.Tasks.TaskCreationOptions creationOptions) [0x00000] in <36514b14425c4337b446653c547aa9c3>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at Mono.AndroidTools.Internal.AdbClientTaskExtensions.WriteCommandWithStatusAsync (Mono.AndroidTools.Adb.AdbClient client, System.String command, System.Threading.Tasks.TaskCreationOptions options) [0x00000] in /Users/builder/azdo/_work/278/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/Internal/AdbClientTaskExtensions.cs:62
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at Mono.AndroidTools.AndroidDevice+<>c__DisplayClass62_0.<RunShellCommand>b__0 (System.Threading.Tasks.Task t) [0x0000f] in /Users/builder/azdo/_work/278/s/xamarin-android/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/AndroidDevice.cs:403
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at System.Threading.Tasks.ContinuationResultTaskFromTask`1[TResult].InnerInvoke () [0x00024] in <36514b14425c4337b446653c547aa9c3>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(590,5): error : at System.Threading.Tasks.Task.Execute () [0x00000] in /Users/builder/jenkins/workspace/build-package-osx-mono/2020-02/external/bockbuild/builds/mono-x64/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2319
Done building target "_Upload" in project "Poseidon.Android.csproj" -- FAILED.
Done building project "***.Android.csproj" -- FAILED.
Build FAILED.
Thank you in advance :-)
@MarcosCobena apparently there is a Bug in VSForMac which does not update the EmbedAssembliesIntoApk element when you click it via the IDE https://developercommunity.visualstudio.com/t/Cant-Disable-Fast-Assembly-Deployment-O/1362042
I Suggest you manually disable it in the csproj by adding the following to your Debug configuration ProeprtyGroup section.
<EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
That should allow you to at least deploy until d16-3 SR 2 is released which contains a fix.
@dellis1972 it worked! Thank you so much :-)
Just updated to v11.2.2.1 stable and this appears to be fixed. Thank you!
Hello Community,
I still continue to get this error even after upgrading VS for Windows to 16.9.2 & Xamarin.Android.SDK is 11.2.2.1.
I upgraded VS after reading the release notes where this issue is marked as fixed but doesnt seem like it unless I am doing something wrong.
I even deleted my bin/obj folders but that didnt help either.
@ataparia can you attach a log as mentioned above? The fix in VS 16.9.2 increased the limit to 4096, but we will be able to have a proper fix in a future 16.10 release.
@jonathanpeppers The solution builds fine and thus the command msbuild
AndroidBuildLog.txt
I enabled "Diagnostics"logging on VS and attached the build/deploy output.
AndroidDeployLog.txt
For the sake of completeness I should mention I'm using Jetbrains Rider for development/deployment, but use the VS Installer for updating Xamarin components. Hopefully this helps focus the troubleshooting since 11.2.2.1 fixed the issue for me.
@ataparia I have an idea why the fix might be working for you command-line, but not when inside Visual Studio.
Check if your VS is installed in Enterprise, Professional, or Community. Mine is installed in C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise
Make a backup of this file somewhere (just in case):
"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\Xamarin.VisualStudio\Mono.AndroidTools.dll"
Then open an administrator command-prompt and run:
> copy "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\Android\Mono.AndroidTools.dll" "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\Xamarin.VisualStudio\Mono.AndroidTools.dll"
Next, restart Visual Studio and see if that solves the problem or not. Thanks!
@jonathanpeppers Thank you so very much. Yes copying that dll did fix the issue. Does future updates of VS 2019 will override the dll again or will this issue be fixed once and for all in the next versions?
@ataparia they are looking to get this file updated in a future service release, thanks.
Most helpful comment
@ataparia I have an idea why the fix might be working for you command-line, but not when inside Visual Studio.
Check if your VS is installed in
Enterprise,Professional, orCommunity. Mine is installed inC:\Program Files (x86)\Microsoft Visual Studio\2019\EnterpriseMake a backup of this file somewhere (just in case):
Then open an administrator command-prompt and run:
Next, restart Visual Studio and see if that solves the problem or not. Thanks!