MTA doesn't work on VSCode+OSX+OpenJDK 16.0.1 because of illegal reflection calls

[deftdawg]

dd@MBP % cd "/Users/dd/Library/Application Support/Code/User/globalStorage/redhat.mta-vscode-extension/.mta/tooling/vscode/mta-cli/mta-cli-5.2.0.Final/bin"

dd@MBP bin % java --version
openjdk 16.0.1 2021-04-20
OpenJDK Runtime Environment AdoptOpenJDK-16.0.1+9 (build 16.0.1+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK-16.0.1+9 (build 16.0.1+9, mixed mode, sharing)

dd@MBP bin % ./mta-cli
Increasing the maximum of open files to 10000.
Using MTA at /Users/dd/Library/Application Support/Code/User/globalStorage/redhat.mta-vscode-extension/.mta/tooling/vscode/mta-cli/mta-cli-5.2.0.Final
MTA execution failed due to: null
java.lang.ExceptionInInitializerError
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.DefineClassHelper.<clinit>(DefineClassHelper.java:216)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:128)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:552)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:537)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.ProxyFactory.createClass1(ProxyFactory.java:473)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:444)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$3.call(ClassLoaderAdapterCallback.java:1044)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.enhance(ClassLoaderAdapterCallback.java:957)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.enhance(ClassLoaderAdapterCallback.java:937)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterBuilder.enhance(ClassLoaderAdapterBuilder.java:63)
	at org.jboss.forge.furnace.se.FurnaceFactory.getInstance(FurnaceFactory.java:68)
	at org.jboss.forge.furnace.se.FurnaceFactory.getInstance(FurnaceFactory.java:33)
	at org.jboss.windup.bootstrap.Bootstrap.run(Bootstrap.java:292)
	at org.jboss.windup.bootstrap.Bootstrap.main(Bootstrap.java:113)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @654b5005
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.SecurityActions$3.run(SecurityActions.java:94)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.SecurityActions$3.run(SecurityActions.java:90)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.SecurityActions.getMethodHandle(SecurityActions.java:89)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.DefineClassHelper$SecuredPrivileged$2.getDefineClassMethodHandle(DefineClassHelper.java:143)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.DefineClassHelper$SecuredPrivileged$2.<init>(DefineClassHelper.java:136)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.DefineClassHelper$SecuredPrivileged.<clinit>(DefineClassHelper.java:134)
	... 15 more

[deftdawg]

This issue can be worked around by applying the following to the exec call in mta-cli

--add-opens java.base/java.lang=ALL-UNNAMED

So the line looks like this:

exec "$JAVACMD" $MODULES "${MTA_DEBUG_ARGS[@]}" $MTA_OPTS --add-opens java.base/java.lang=ALL-UNNAMED -Dforge.standalone=true -Dforge.home="${MTA_HOME}" -Dwindup.home="${MTA_HOME}" \
   -cp "${MTA_HOME}"/lib/'*' $MTA_MAIN_CLASS "${QUOTED_ARGS[@]}" "${ADDONS_DIR[@]}"

[deftdawg]

Related to this once you get past the initial reflection errors there's another ... must add this also:

--add-opens java.base/java.util=ALL-UNNAMED

error:

Migration Toolkit for Applications (MTA) CLI, version [ 5.2.0.Final ] - by Red Hat, Inc. [ https://developers.redhat.com/products/mta/overview/ ]

Failed to start MTA!
java.lang.RuntimeException: Could not retrieve ClassLoader whitelist from callback [org.jboss.forge.furnace.se.FurnaceFactory$1@62e136d3].
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.whitelistContainsAll(ClassLoaderAdapterCallback.java:638)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.enhance(ClassLoaderAdapterCallback.java:948)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.enhanceResult(ClassLoaderAdapterCallback.java:252)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.access$200(ClassLoaderAdapterCallback.java:38)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$2.call(ClassLoaderAdapterCallback.java:125)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.invoke(ClassLoaderAdapterCallback.java:97)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.java_util_concurrent_Future_$$_jvst73b_2.get(java_util_concurrent_Future_$$_jvst73b_2.java)
	at org.jboss.windup.bootstrap.commands.windup.ToolingModeCommand.execute(ToolingModeCommand.java:58)
	at org.jboss.windup.bootstrap.Bootstrap.toolingMode(Bootstrap.java:545)
	at org.jboss.windup.bootstrap.Bootstrap.main(Bootstrap.java:111)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make public final boolean java.util.HashMap$HashIterator.hasNext() accessible: module java.base does not "opens java.util" to unnamed module @530612ba
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
	at java.base/java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:130)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$2.call(ClassLoaderAdapterCallback.java:120)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.invoke(ClassLoaderAdapterCallback.java:97)
	at org.jboss.forge.furnace.proxy.javassist.util.proxy.java_util_Iterator_$$_jvst73b_5.hasNext(java_util_Iterator_$$_jvst73b_5.java)
	at org.jboss.forge.furnace.se.FurnaceFactory$1.call(FurnaceFactory.java:85)
	at org.jboss.forge.furnace.se.FurnaceFactory$1.call(FurnaceFactory.java:71)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.whitelistContainsAll(ClassLoaderAdapterCallback.java:628)
	... 10 more
Calling ToolingModeRunner...
Using Data:
input: [/Users/dd/projects/hlink-web/HLinkWeb]
output: /Users/dd/Library/Application Support/Code/User/globalStorage/redhat.mta-vscode-extension/.mta/tooling/vscode/7ss1bqtb0-i7i5a7u05
sourceMode: true
skipReport: false
ignorePatterns: []
windupHome: /Users/dd/Library/Application Support/Code/User/globalStorage/redhat.mta-vscode-extension/.mta/tooling/vscode/mta-cli/mta-cli-5.2.0.Final
source: [websphere, java, log4j, oraclejdk]
target: [cloud-readiness, openjdk, linux]
userRulesDirectory: []
MTA execution failed due to: No services of type [org.jboss.windup.tooling.ToolingModeRunner] could be found in any started addons.
org.jboss.forge.furnace.exception.ContainerException: No services of type [org.jboss.windup.tooling.ToolingModeRunner] could be found in any started addons.
	at org.jboss.forge.furnace.impl.addons.ImportedImpl.get(ImportedImpl.java:79)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$2.call(ClassLoaderAdapterCallback.java:124)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.invoke(ClassLoaderAdapterCallback.java:97)
	at org.jboss.forge.furnace.services.Imported_$$_jvst73b_6.get(Imported_$$_jvst73b_6.java)
	at org.jboss.windup.bootstrap.commands.windup.ToolingModeCommand.analyze(ToolingModeCommand.java:130)
	at org.jboss.windup.bootstrap.commands.windup.ToolingModeCommand.execute(ToolingModeCommand.java:65)
	at org.jboss.windup.bootstrap.Bootstrap.toolingMode(Bootstrap.java:545)
	at org.jboss.windup.bootstrap.Bootstrap.main(Bootstrap.java:111)