Graalvm native-image support

Hello, I’ve tried to build a native-image for simple setup with “http4s-blaze-core” % “0.21.4”. sbt 'show graalvm-native-image:packageBin'

and got errors:

[info] Set current project to Scala Seed Project (in build file:/Users/dmitriy/projects/scala/tmp/blaze-graalvm-test/)
[info] Wrote /Users/dmitriy/projects/scala/tmp/blaze-graalvm-test/target/scala-2.13/scala-seed-project_2.13-0.1.0-SNAPSHOT.pom
[info] Build on Server(pid: 72024, port: 59014)
[info] [Scala Seed Project:72024]    classlist:   5,490.36 ms,  2.79 GB
[info] [Scala Seed Project:72024]        (cap):   2,018.71 ms,  2.79 GB
[info] [Scala Seed Project:72024]        setup:   2,307.80 ms,  2.79 GB
[error] warning: unknown locality of class Lscala/util/hashing/MurmurHash3$accum$1;, assuming class is not local. To remove the warning report an issue to the library or language author. The issue is caused by Lscala/util/hashing/MurmurHash3$accum$1; which is not following the naming convention.
[info] [Scala Seed Project:72024]   (typeflow):   8,087.28 ms,  2.94 GB
[info] [Scala Seed Project:72024]    (objects):   9,236.84 ms,  2.94 GB
[info] [Scala Seed Project:72024]   (features):     314.38 ms,  2.94 GB
[info] [Scala Seed Project:72024]     analysis:  18,062.00 ms,  2.94 GB
[error] Error: Unsupported features in 3 methods
[error] Detailed message:
[error] Error: com.oracle.graal.pointsto.constraints.UnresolvedElementException: Discovered unresolved type during parsing: org.slf4j.impl.StaticLoggerBinder. To diagnose the issue you can use the --allow-incomplete-classpath option. The missing type is then reported at run time when it is accessed the first time.
[error] Trace: 
[error]         at parsing org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:418)
[error] Call path from entry point to org.slf4j.LoggerFactory.getILoggerFactory(): 
[error]         at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:408)[error]         at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)[error]         at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup.<init>(NIO1SocketServerGroup.scala:95)[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup$.apply(NIO1SocketServerGroup.scala:47)[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup$.fixedGroup(NIO1SocketServerGroup.scala:61)[error]         at example.Main$.main(Hello.scala:34)
[error]         at example.Main.main(Hello.scala)
[error]         at com.oracle.svm.core.JavaMainWrapper.runCore(JavaMainWrapper.java:151)
[error]         at com.oracle.svm.core.JavaMainWrapper.run(JavaMainWrapper.java:186)
[error]         at com.oracle.svm.core.code.IsolateEnterStub.JavaMainWrapper_run_5087f5482cc9a6abc971913ece43acb471d2631b(generated:0)
[error] Error: com.oracle.graal.pointsto.constraints.UnsupportedFeatureException: Invoke with MethodHandle argument could not be reduced to at most a single call or single field acce
ss. The method handle must be a compile time constant, e.g., be loaded from a `static final` field. Method that contains the method handle invocation: java.lang.invoke.MethodHandle.i
nvokeBasic()
[error] To diagnose the issue, you can add the option --report-unsupported-elements-at-runtime. The error is then reported at run time when the invoke is executed.
[error] Trace: 
[error]         at parsing java.lang.invoke.LambdaForm$MH/414370096.invoke_MT(LambdaForm$MH)
[error] Call path from entry point to java.lang.invoke.LambdaForm$MH/414370096.invoke_MT(Object, Object): 
[error]         at java.lang.invoke.LambdaForm$MH/414370096.invoke_MT(LambdaForm$MH)
[error]         at scala.runtime.Statics.releaseFence(Statics.java:148)
[error]         at org.http4s.blaze.channel.ChannelHead.<init>(ChannelHead.scala:9)
[error]         at org.http4s.blaze.channel.nio1.NIO1HeadStage.<init>(NIO1HeadStage.scala:111)
[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup.fromKey$1(NIO1SocketServerGroup.scala:270)
[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup.$anonfun$handleClientChannel$2(NIO1SocketServerGroup.scala:286)
[error]         at org.http4s.blaze.channel.nio1.NIO1SocketServerGroup$$Lambda$171/702574143.apply(Unknown Source)
[error]         at org.http4s.blaze.channel.nio1.SelectorLoop$$anon$2.run(SelectorLoop.scala:148)
[error]         at com.oracle.svm.core.jdk.RuntimeSupport.executeHooks(RuntimeSupport.java:144)
[error]         at com.oracle.svm.core.jdk.RuntimeSupport.executeStartupHooks(RuntimeSupport.java:89)
[error]         at com.oracle.svm.core.JavaMainWrapper.runCore(JavaMainWrapper.java:143)
[error]         at com.oracle.svm.core.JavaMainWrapper.run(JavaMainWrapper.java:186)
[error]         at com.oracle.svm.core.code.IsolateEnterStub.JavaMainWrapper_run_5087f5482cc9a6abc971913ece43acb471d2631b(generated:0)
[error] Error: com.oracle.svm.hosted.substitute.DeletedElementException: Unsupported type java.lang.invoke.MemberName is reachable: All methods from java.lang.invoke should have been
 replaced during image building.
[error] To diagnose the issue, you can add the option --report-unsupported-elements-at-runtime. The unsupported element is then reported at run time when it is accessed the first tim
e.
[error] Trace: 
[error]         at parsing java.lang.invoke.MethodHandles$Lookup.findVirtual(MethodHandles.java:861)
[error] Call path from entry point to java.lang.invoke.MethodHandles$Lookup.findVirtual(Class, String, MethodType): 
[error]         no path found from entry point to target method
[error] Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
[error] Error: Image build request failed with exit status 1
[error] java.lang.RuntimeException: Failed to run List(native-image, --class-path, /Users/dmitriy/projects/scala/tmp/blaze-graalvm-test/target/scala-2.13/scala-seed-project_2.13-0.1.
0-SNAPSHOT.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/blaze-core_2.13/0.14.12/blaze-core_2.13-0.14.12.jar:/Users/dmitriy/Library/Caches/Cou
rsier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-core_2.13/2.1.1/cats-core_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/ht
tp4s-core_2.13/0.21.4/http4s-core_2.13-0.21.4.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.2/scala-library-2.13.2.jar:
/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-macros_2.13/2.1.1/cats-macros_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https
/repo1.maven.org/maven2/org/eclipse/jetty/alpn/alpn-api/1.1.3.v20160715/alpn-api-1.1.3.v20160715.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s
/http4s-blaze-core_2.13/0.21.4/http4s-blaze-core_2.13-0.21.4.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/chrisdavenport/vault_2.13/2.0.0/vault_2.13-2.0.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-effect_2.13/2.1.3/cats-effect_2.13-2.1.3.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/twitter/hpack/1.0.2/hpack-1.0.2.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/co/fs2/fs2-io_2.13/2.3.0/fs2-io_2.13-2.3.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/parboiled_2.13/2.0.1/parboiled_2.13-2.0.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/co/fs2/fs2-core_2.13/2.3.0/fs2-core_2.13-2.3.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-kernel_2.13/2.1.1/cats-kernel_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/blaze-http_2.13/0.14.12/blaze-http_2.13-0.14.12.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/log4s/log4s_2.13/1.8.2/log4s_2.13-1.8.2.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/chrisdavenport/unique_2.13/2.0.0/unique_2.13-2.0.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scodec/scodec-bits_2.13/1.1.14/scodec-bits_2.13-1.1.14.jar, -H:Name=Scala Seed Project, --no-fallback, example.Main), exit status: 1
[error]         at scala.sys.package$.error(package.scala:30)
[error]         at com.typesafe.sbt.packager.graalvmnativeimage.GraalVMNativeImagePlugin$.buildLocal(GraalVMNativeImagePlugin.scala:115)
[error]         at com.typesafe.sbt.packager.graalvmnativeimage.GraalVMNativeImagePlugin$.$anonfun$scopedSettings$7(GraalVMNativeImagePlugin.scala:76)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error]         at sbt.std.Transform$$anon$4.work(Transform.scala:67)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:281)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:19)
[error]         at sbt.Execute.work(Execute.scala:290)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:281)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error]         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error]         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error]         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error]         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[error]         at java.lang.Thread.run(Thread.java:748)
[error] (Graalvm-native-image / packageBin) Failed to run List(native-image, --class-path, /Users/dmitriy/projects/scala/tmp/blaze-graalvm-test/target/scala-2.13/scala-seed-project_2.13-0.1.0-SNAPSHOT.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/blaze-core_2.13/0.14.12/blaze-core_2.13-0.14.12.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-core_2.13/2.1.1/cats-core_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/http4s-core_2.13/0.21.4/http4s-core_2.13-0.21.4.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.2/scala-library-2.13.2.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-macros_2.13/2.1.1/cats-macros_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/jetty/alpn/alpn-api/1.1.3.v20160715/alpn-api-1.1.3.v20160715.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/http4s-blaze-core_2.13/0.21.4/http4s-blaze-core_2.13-0.21.4.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/chrisdavenport/vault_2.13/2.0.0/vault_2.13-2.0.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-effect_2.13/2.1.3/cats-effect_2.13-2.1.3.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/twitter/hpack/1.0.2/hpack-1.0.2.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/co/fs2/fs2-io_2.13/2.3.0/fs2-io_2.13-2.3.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/parboiled_2.13/2.0.1/parboiled_2.13-2.0.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/co/fs2/fs2-core_2.13/2.3.0/fs2-core_2.13-2.3.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/typelevel/cats-kernel_2.13/2.1.1/cats-kernel_2.13-2.1.1.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/http4s/blaze-http_2.13/0.14.12/blaze-http_2.13-0.14.12.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/log4s/log4s_2.13/1.8.2/log4s_2.13-1.8.2.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/chrisdavenport/unique_2.13/2.0.0/unique_2.13-2.0.0.jar:/Users/dmitriy/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scodec/scodec-bits_2.13/1.1.14/scodec-bits_2.13-1.1.14.jar, -H:Name=Scala Seed Project, --no-fallback, example.Main), exit status: 1
[error] Total time: 28 s, completed Apr 30, 2020 1:45:33 PM

Do you have any plans to implement native-image support?

You can find my test repo here: https://github.com/dkovalenko/blaze-graalvm-test To build using docker, without local native-image installation you can uncomment

// graalVMNativeImageGraalVersion := Some("20.0.0")

in build.sbt

Thank you.

[rossabaker]

You’re using the raw blaze backend without any of the http4s wrapper. I would change the dependency to "org.http4s" %% “blaze-http” % “0.14.2”. http4s-blaze-core` pulls that in transitively, but it’s way more than you need.

I am not a GraalVM expert, but it looks like you’re failing on a missing slf4j backend. Someone mentioned the java.util.logging backend as a good choice. I would try also adding "org.slf4j" % "slf4j-jdk14" % "1.7.30" as a dependency.

There is work on documenting GraalVM use with the rest of http4s at https://github.com/http4s/http4s/issues/3299. You’re one level deeper, but may find more tips there.

[dkovalenko]

Thank you!