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Context: https://dev.azure.com/xamarin/public/_build/results?buildId=40929&view=logs&j=cfef19e4-4225-5e84-636a-86ba2231ac21&t=cd3bc6c3-ac29-5320-67c9-5fb59fc8e05c&l=732

dotnet/maui has hit some build failures such as:

error XARSD7000: System.Xml.XmlException: Root element is missing.
error XARSD7000:   at System.Xml.XmlTextReaderImpl.Throw (System.Exception e) [0x00027] in <cd2a19182af54ce694ec155c18cdf0fc>:0
error XARSD7000:   at System.Xml.XmlTextReaderImpl.ThrowWithoutLineInfo (System.String res) [0x00017] in <cd2a19182af54ce694ec155c18cdf0fc>:0
error XARSD7000:   at System.Xml.XmlTextReaderImpl.ParseDocumentContent () [0x0035d] in <cd2a19182af54ce694ec155c18cdf0fc>:0
error XARSD7000:   at System.Xml.XmlTextReaderImpl.Read () [0x0008c] in <cd2a19182af54ce694ec155c18cdf0fc>:0
error XARSD7000:   at System.Xml.XmlReader.MoveToContent () [0x0003a] in <cd2a19182af54ce694ec155c18cdf0fc>:0
error XARSD7000:   at System.Xml.Linq.XElement.Load (System.Xml.XmlReader reader, System.Xml.Linq.LoadOptions options) [0x0000e] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
error XARSD7000:   at System.Xml.Linq.XElement.Parse (System.String text, System.Xml.Linq.LoadOptions options) [0x00016] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
error XARSD7000:   at System.Xml.Linq.XElement.Parse (System.String text) [0x00000] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
error XARSD7000:   at Xamarin.Android.Tools.JdkInfo+<GetLibexecJdkPaths>d__56.MoveNext () [0x0007e] in <2f2fbe285c184b618ed10818f205c9e8>:0
error XARSD7000:   at System.Linq.Enumerable+DistinctIterator`1[TSource].MoveNext () [0x00028] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00029] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].ToArray () [0x0003e] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.Buffer`1[TElement]..ctor (System.Collections.Generic.IEnumerable`1[T] source) [0x0000a] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.OrderedEnumerable`1+<GetEnumerator>d__3[TElement].MoveNext () [0x0001e] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.Enumerable+ConcatIterator`1[TSource].MoveNext () [0x0002b] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00029] in <22add0566d954580989fae334638a101>:0
error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkBase.GetValidPath (System.Func`2[T,TResult] pathValidator, System.String ctorParam, System.Func`1[TResult] getPreferredPath, System.Func`1[TResult] getAllPaths) [0x00040] in <2f2fbe285c184b618ed10818f205c9e8>:0
error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkBase.Initialize (System.String androidSdkPath, System.String androidNdkPath, System.String javaSdkPath) [0x00030] in <2f2fbe285c184b618ed10818f205c9e8>:0
error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkInfo..ctor (System.Action`2[T1,T2] logger, System.String androidSdkPath, System.String androidNdkPath, System.String javaSdkPath) [0x00025] in <2f2fbe285c184b618ed10818f205c9e8>:0
error XARSD7000:   at Xamarin.Android.Tasks.MonoAndroidHelper.RefreshAndroidSdk (System.String sdkPath, System.String ndkPath, System.String javaPath, Microsoft.Build.Utilities.TaskLoggingHelper logHelper) [0x00005] in <5a1df33220564ef787578ac3c7e67d03>:0
error XARSD7000:   at Xamarin.Android.Tasks.ResolveSdks.RunTask () [0x000ac] in <5a1df33220564ef787578ac3c7e67d03>:0
error XARSD7000:   at Xamarin.Android.Tasks.AndroidTask.Execute () [0x00000] in <5a1df33220564ef787578ac3c7e67d03>:0

Looking at the method in question, it doesn't handle XmlException
and warn appropriately.

I don't have the actual output of /usr/libexec/java_home from
these machines, but I suspect it's printing some message before the
XML or no XML at all.

Context: https://dev.azure.com/xamarin/public/_build/results?buildId=40929&view=logs&j=cfef19e4-4225-5e84-636a-86ba2231ac21&t=cd3bc6c3-ac29-5320-67c9-5fb59fc8e05c&l=732

dotnet/maui has hit some build failures such as:

    error XARSD7000: System.Xml.XmlException: Root element is missing.
    error XARSD7000:   at System.Xml.XmlTextReaderImpl.Throw (System.Exception e) [0x00027] in <cd2a19182af54ce694ec155c18cdf0fc>:0
    error XARSD7000:   at System.Xml.XmlTextReaderImpl.ThrowWithoutLineInfo (System.String res) [0x00017] in <cd2a19182af54ce694ec155c18cdf0fc>:0
    error XARSD7000:   at System.Xml.XmlTextReaderImpl.ParseDocumentContent () [0x0035d] in <cd2a19182af54ce694ec155c18cdf0fc>:0
    error XARSD7000:   at System.Xml.XmlTextReaderImpl.Read () [0x0008c] in <cd2a19182af54ce694ec155c18cdf0fc>:0
    error XARSD7000:   at System.Xml.XmlReader.MoveToContent () [0x0003a] in <cd2a19182af54ce694ec155c18cdf0fc>:0
    error XARSD7000:   at System.Xml.Linq.XElement.Load (System.Xml.XmlReader reader, System.Xml.Linq.LoadOptions options) [0x0000e] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
    error XARSD7000:   at System.Xml.Linq.XElement.Parse (System.String text, System.Xml.Linq.LoadOptions options) [0x00016] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
    error XARSD7000:   at System.Xml.Linq.XElement.Parse (System.String text) [0x00000] in <7a9b77c9c73b43f99a32b1ba98596ce4>:0
    error XARSD7000:   at Xamarin.Android.Tools.JdkInfo+<GetLibexecJdkPaths>d__56.MoveNext () [0x0007e] in <2f2fbe285c184b618ed10818f205c9e8>:0
    error XARSD7000:   at System.Linq.Enumerable+DistinctIterator`1[TSource].MoveNext () [0x00028] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00029] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].ToArray () [0x0003e] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.Buffer`1[TElement]..ctor (System.Collections.Generic.IEnumerable`1[T] source) [0x0000a] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.OrderedEnumerable`1+<GetEnumerator>d__3[TElement].MoveNext () [0x0001e] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.Enumerable+ConcatIterator`1[TSource].MoveNext () [0x0002b] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00029] in <22add0566d954580989fae334638a101>:0
    error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkBase.GetValidPath (System.Func`2[T,TResult] pathValidator, System.String ctorParam, System.Func`1[TResult] getPreferredPath, System.Func`1[TResult] getAllPaths) [0x00040] in <2f2fbe285c184b618ed10818f205c9e8>:0
    error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkBase.Initialize (System.String androidSdkPath, System.String androidNdkPath, System.String javaSdkPath) [0x00030] in <2f2fbe285c184b618ed10818f205c9e8>:0
    error XARSD7000:   at Xamarin.Android.Tools.AndroidSdkInfo..ctor (System.Action`2[T1,T2] logger, System.String androidSdkPath, System.String androidNdkPath, System.String javaSdkPath) [0x00025] in <2f2fbe285c184b618ed10818f205c9e8>:0
    error XARSD7000:   at Xamarin.Android.Tasks.MonoAndroidHelper.RefreshAndroidSdk (System.String sdkPath, System.String ndkPath, System.String javaPath, Microsoft.Build.Utilities.TaskLoggingHelper logHelper) [0x00005] in <5a1df33220564ef787578ac3c7e67d03>:0
    error XARSD7000:   at Xamarin.Android.Tasks.ResolveSdks.RunTask () [0x000ac] in <5a1df33220564ef787578ac3c7e67d03>:0
    error XARSD7000:   at Xamarin.Android.Tasks.AndroidTask.Execute () [0x00000] in <5a1df33220564ef787578ac3c7e67d03>:0

Looking at the method in question, it doesn't handle `XmlException`
and warn appropriately.

I don't have the *actual* output of `/usr/libexec/java_home` from
these machines, but I suspect it's printing some message before the
XML or no XML at all.
@jonathanpeppers jonathanpeppers requested a review from jonpryor June 2, 2021 22:10
@jonathanpeppers
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After talking with the dotnet/maui team, this was a new pool they just setup.

It probably doesn't have a Java at all, and so /usr/libexec/java_home is probably outputting an empty string?

@jonathanpeppers
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Fixes: dotnet/android#5992

@jonpryor jonpryor merged commit 79e3b97 into dotnet:main Jun 4, 2021
@jonathanpeppers jonathanpeppers deleted the jdkinfo-xmlexception branch June 4, 2021 20:11
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2 participants