General discussion

[nickcoast]

a@a-b:~/code/scala.js/scala-webapp-template$ sbt dev-web
a@b:~/scala-webapp-template$ sbt dev-web
Unrecognized VM option 'CMSClassUnloadingEnabled'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
copying runtime jar...
mkdir: cannot create directory ‘’: No such file or directory
Unrecognized VM option 'CMSClassUnloadingEnabled'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Unrecognized VM option 'CMSClassUnloadingEnabled'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

I'm new to Scala and Java so I'm sure the answer should be obvious but I've been struggling with it so I thought I'd ask for some help.

I did some Googling and found that CMSClassUnloadingEnabled option was deprecated before Java 14.
Is that true?
What version of Java should I use?

https://stackoverflow.com/questions/70214788/unrecognized-vm-option-cmsclassunloadingenabled-after-switching-to-java-17

I tried this:

$ sdk use java 11.0.16-tem
$ sbt dev-web

And got a about 8 warnings and some errors.

[info] welcome to sbt 1.6.2 (Eclipse Adoptium Java 11.0.16)
[info] loading settings for project global-plugins from plugins.sbt ...
[info] loading global plugins from /home/a/.sbt/1.0/plugins
[info] loading settings for project scala-webapp-template-build from plugins.sbt ...
[info] loading project definition from /home/a/code/scala.js/scala-webapp-template/project
[info] loading settings for project root from build.sbt ...
[info] BuildInfo settings:
[info] (apiUrl,None)
[info] BuildInfo settings:
[info] (apiUrl,None)
[info] set current project to root (in build file:/home/a/code/scala.js/scala-webapp-template/)
[warn] there are 8 keys that are not used by any other settings/tasks:
[warn]  
[warn] * admin / Compile / fastOptJS / webpackExtraArgs
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:199
[warn] * admin / Compile / fullOptJS / webpackExtraArgs
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:200
[warn] * apiJS / Compile / stMinimize
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:274
[warn] * commonJS / Compile / stMinimize
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:249
[warn] * ui / Compile / stMinimize
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:310
[warn] * web / Compile / fastOptJS / webpackExtraArgs
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:199
[warn] * web / Compile / fullOptJS / webpackExtraArgs
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:200
[warn] * web / Compile / stMinimize
[warn]   +- /home/a/code/scala.js/scala-webapp-template/build.sbt:388
[warn]  
[warn] note: a setting might still be used by a command; to exclude a key from this `lintUnused` check
[warn] either append it to `Global / excludeLintKeys` or call .withRank(KeyRanks.Invisible) on the key
[warn] sbt 0.13 shell syntax is deprecated; use slash syntax instead: web / Compile / fastOptJS / startWebpackDevServer
[info] Updating NPM dependencies
[info] Using lockfile /home/a/code/scala.js/scala-webapp-template/web/yarn.lock
[error] Usage: yarn [options]
[error] yarn: error: no such option: --non-interactive
[info] Updating NPM dependencies
[info] Using lockfile /home/a/code/scala.js/scala-webapp-template/lib/ui/yarn.lock
[error] Usage: yarn [options]
[error] yarn: error: no such option: --non-interactive
[error] java.lang.RuntimeException: Non-zero exit code: 2
[error] 	at scala.sys.package$.error(package.scala:30)
[error] 	at scalajsbundler.util.Commands$.$anonfun$run$9(Commands.scala:38)
[error] 	at scala.util.Either.fold(Either.scala:192)
[error] 	at scalajsbundler.util.Commands$.run(Commands.scala:38)
[error] 	at scalajsbundler.ExternalCommand.run(ExternalCommand.scala:22)
[error] 	at scalajsbundler.ExternalCommand$.$anonfun$install$1(ExternalCommand.scala:90)
[error] 	at scalajsbundler.ExternalCommand$.syncYarnLockfile(ExternalCommand.scala:46)
[error] 	at scalajsbundler.ExternalCommand$.install(ExternalCommand.scala:89)
[error] 	at scalajsbundler.sbtplugin.NpmUpdateTasks$.$anonfun$npmInstallDependencies$1(NpmUpdateTasks.scala:59)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$1(FileFunction.scala:80)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$4(FileFunction.scala:153)
[error] 	at sbt.util.Difference.apply(Tracked.scala:414)
[error] 	at sbt.util.Difference.apply(Tracked.scala:394)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$3(FileFunction.scala:149)
[error] 	at sbt.util.Difference.apply(Tracked.scala:414)
[error] 	at sbt.util.Difference.apply(Tracked.scala:389)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$2(FileFunction.scala:148)
[error] 	at scalajsbundler.sbtplugin.NpmUpdateTasks$.npmInstallDependencies(NpmUpdateTasks.scala:62)
[error] 	at scalajsbundler.sbtplugin.ScalaJSBundlerPlugin$.$anonfun$perConfigSettings$7(ScalaJSBundlerPlugin.scala:650)
[error] 	at scala.Function1.$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$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:829)
[error] java.lang.RuntimeException: Non-zero exit code: 2
[error] 	at scala.sys.package$.error(package.scala:30)
[error] 	at scalajsbundler.util.Commands$.$anonfun$run$9(Commands.scala:38)
[error] 	at scala.util.Either.fold(Either.scala:192)
[error] 	at scalajsbundler.util.Commands$.run(Commands.scala:38)
[error] 	at scalajsbundler.ExternalCommand.run(ExternalCommand.scala:22)
[error] 	at scalajsbundler.ExternalCommand$.$anonfun$install$1(ExternalCommand.scala:90)
[error] 	at scalajsbundler.ExternalCommand$.syncYarnLockfile(ExternalCommand.scala:46)
[error] 	at scalajsbundler.ExternalCommand$.install(ExternalCommand.scala:89)
[error] 	at scalajsbundler.sbtplugin.NpmUpdateTasks$.$anonfun$npmInstallDependencies$1(NpmUpdateTasks.scala:59)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$1(FileFunction.scala:80)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$4(FileFunction.scala:153)
[error] 	at sbt.util.Difference.apply(Tracked.scala:414)
[error] 	at sbt.util.Difference.apply(Tracked.scala:394)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$3(FileFunction.scala:149)
[error] 	at sbt.util.Difference.apply(Tracked.scala:414)
[error] 	at sbt.util.Difference.apply(Tracked.scala:389)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$2(FileFunction.scala:148)
[error] 	at scalajsbundler.sbtplugin.NpmUpdateTasks$.npmInstallDependencies(NpmUpdateTasks.scala:62)
[error] 	at scalajsbundler.sbtplugin.ScalaJSBundlerPlugin$.$anonfun$perConfigSettings$7(ScalaJSBundlerPlugin.scala:650)
[error] 	at scala.Function1.$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$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:829)
[error] (ui / Compile / npmInstallDependencies) Non-zero exit code: 2
[error] (web / Compile / npmInstallDependencies) Non-zero exit code: 2
[error] Total time: 1 s, completed Sep 27, 2022, 7:00:50 PM

[AlexITC]

I really haven't tried with jdk 17 but there seems to be an unknown jvm option involved.

The recommended way is to leverage https://sdkman.io/ and pick the jdk from https://github.com/wiringbits/scala-webapp-template/blob/master/.sdkmanrc (which seems out of date), java 11.0.16-tem should work.

sbt dev-web

It does print some warnings but the logs you shared show the problem:

[error] Usage: yarn [options]
[error] yarn: error: no such option: --non-interactive

I'd bet you are using an incompatible yarn version, I'd suggest to use https://github.com/nvm-sh/nvm to pick the supported node version (https://github.com/wiringbits/scala-webapp-template/blob/master/.nvmrc), then, install yarn (I have 1.22.11).

If you get more issues, feel free to comment, I'm in the process to update the docs.

[AlexITC]

@nickcoast please check the docs and let us know if you get into any other issues: https://github.com/wiringbits/scala-webapp-template/blob/master/docs/setup-dev-environment.md

[nickcoast]

EDIT: I see you added some docs since the time I started composing this reply. I will take a look. Thanks again.

---

Thank you so much! Your suggestions helped me get past those issues and get this working.

Just in case it might be useful for your documentation, I'll note a couple problems I worked through . Though they may be basic and obvious to others.

• yarn: I had to use global option to fix the yarn problem. npm install --global yarn.

• postgres: Pretty sure I ran this query, CREATE EXTENSION IF NOT EXISTS CITEXT, during set up, but got error on localhost:9000, Ran the query again and clicked the 'resolve' - no change. No user* tables created. Finally, deleted play_evolutions table and restarted the Scala server, and all tables got created.

• Creating a new account worked (db records were added), but I received no confirmation on the frontend (still shows filled in form - see screenshot below). I assume that's because of failure to communicate with the AWS service that would exist in production. I ran the query UPDATE users SET verified_on = '2022-09-29'; and now login works.

Here's the new account error:
software.amazon.awssdk.services.ses.model.SesException: The security token included in the request is invalid. (Service: Ses, Status Code: 403, Request ID: 0974de2c-0ab8-463b-a806-f34fbd2b4f93)

Here's the form after submission, with the AWS error:

Also, the Ubuntu Setup section was helpful but, perhaps naively, I assumed all other dependencies would be handled in the build process. As you pointed out, I needed the right node version to get yarn to work. But again, maybe that's just me not having enough experience with these technologies and maybe your target audience is more savvy.

Thanks again!

[AlexITC]

Thanks for getting back and sharing the useful insights, I'll take your suggestions and update the docs again.

yarn: I had to use global option to fix the yarn problem. npm install --global yarn.

I included this a couple of hours ago.

postgres: Pretty sure I ran this query, CREATE EXTENSION IF NOT EXISTS CITEXT, during set up, but got error on localhost:9000, Ran the query again and clicked the 'resolve' - no change. No user* tables created. Finally, deleted play_evolutions table and restarted the Scala server, and all tables got created.

People commonly fails to connect to the database before creating the extension, there is a chance you experienced the same.

Creating a new account worked (db records were added), but I received no confirmation on the frontend (still shows filled in form - see screenshot below). I assume that's because of failure to communicate with the AWS service that would exist in production. I ran the query UPDATE users SET verified_on = '2022-09-29'; and now login works.

Oh, good catch! most emails are sent through a background job but it seems this is not the case when you are creating an account.

Also, the Ubuntu Setup section was helpful but, perhaps naively, I assumed all other dependencies would be handled in the build process. As you pointed out, I needed the right node version to get yarn to work. But again, maybe that's just me not having enough experience with these technologies and maybe your target audience is more savvy.

Which section are you referring to?

all other dependencies would be handled in the build process

There are some native dependencies required, I tried making that clear on the new docs, yarn was particularly hidden.

maybe your target audience is more savvy.

I'm actually trying to make the process as simple as possible, we have had this project mostly for internal usage, hence, the support has been handled through our internal chats.

[AlexITC]

Oh, good catch! most emails are sent through a background job but it seems this is not the case when you are creating an account.

Now I finally remember why it was done this way, most emails are sent through the background job unless they include sensitive information, for example, the token used to verify an email or to recover a password, I created #285 to simplify this process, now, there are no more errors when an account is created but AWS is not used.

[nickcoast]

That makes sense, works great.

Your new docs for Architecture are extremely helpful. I've added some models but am was getting a 500 Internal Server error when running server/run and I'm wondering if you can help me find a log that would show me the error text. localhost:9000 was showing some useful information, but after I added some more code I'm just getting a 500 Internal Server Error.

Nothing is logged in ~.logs/application.log, nor in the Postgresql log, for this error.

The error went away after I added 2.sql evolution, but I would still like to know where I can find error information. Thank you!

https://github.com/nickcoast/fbn-scala

Also, by the way, in case you will be adding any IDE docs, I will share a couple things I found helpful in IntelliJ. I created 1 run configuration each for server/run, dev-web, and dev-admin and combined them under a "Compound" configuration that runs all 3 at once. Before that, I was running one in IntelliJ's sbt console, and the other two in IntelliJ terminal windows, which didn't seem like the right way to do it.

Also, I added *.iml to .gitignore to ignore IntelliJ's files, and added .envrc to ignore the direnv file from your docs.

[AlexITC]

Your new docs for Architecture are extremely helpful

Glad you liked that, there is still work to be done to adapt the code to make such separations clear.

I've added some models but am was getting a 500 Internal Server error when running server/run and I'm wondering if you can help me find a log that would show me the error text. localhost:9000 was showing some useful information, but after I added some more code I'm just getting a 500 Internal Server Error.

Logs are printed to stdout, could it be anything related to your compound IDE settings? I tend to run the app by launching 3 terminals, the one where I execute sbt server/run prints the logs, in any case, file logs should be found at ~/logs/application.log (see logback.xml)

The error went away after I added 2.sql evolution, but I would still like to know where I can find error information. Thank you!

This is actually weird, I'd bet there is something else going on but it is hard to tell without logs.

I see you got into some trouble with sql parsers, feel free to ask questions about those.

[nickcoast]

Thank you!
Actually it turns my 2.sql evolution did not cause the change in the failure mode. It was a new syntax syntax error from when I git merged, and I guess the web interface for Scala Play stopped at the syntax error. After I fixed it, the 500 error came back, but only if I added my new implicit val Case Class parsers to daos/package.scala. (If commented them out, a different Scala Play error page came up) I am guessing that it's because the parsers rely on bytecode and my IDE did not recompile it yet. Does that sound right?

I don't know if my parsers, etc, are really working until I try some read/write but at least there are no compile or runtime errors yet.

So, the server seems to be working and my next steps will be creating new widgets and/or pages.

By the way, the evolutions error happened because I already created my tables, so evolutions could not CREATE TABLE. I clicked "resolved" on the web interface but nothing changed. I had to DROP my tables, run DELETE FROM play_evolutions WHERE id = 2, and restart the server so that 2.sql could be reapplied and marked successful in the play_evolutions table. Is that normal?

Thanks so much for your help!

[AlexITC]

Actually it turns my 2.sql evolution did not cause the change in the failure mode

Which makes sense, in any case, I'd expect it to cause a failure.

After I fixed it, the 500 error came back, but only if I added my new implicit val Case Class parsers to daos/package.scala. (If commented them out, a different Scala Play error page came up) I am guessing that it's because the parsers rely on bytecode and my IDE did not recompile it yet. Does that sound right?

It is hard to know without logs.

I don't know if my parsers, etc, are really working until I try some read/write but at least there are no compile or runtime errors yet.

Usually, you write a simple test to verify that (check tests for repositories).

By the way, the evolutions error happened because I already created my tables, so evolutions could not CREATE TABLE. I clicked "resolved" on the web interface but nothing changed. I had to DROP my tables, run DELETE FROM play_evolutions WHERE id = 2, and restart the server so that 2.sql could be reapplied and marked successful in the play_evolutions table. Is that normal?

Usually, the UI should work but I tend to update play_evolutions table directly when such details occur, same way, repository tests help you to make sure evolutions can be applied correctly.

[nickcoast]

Hi Alex,

I added some routes, a controller, actions, repos. I'm getting an error related to java.time.Instant but the error output doesn't seem to point to anywhere in my code. Do you have any tips on how I could debug this?

Thank you

Output from sbt server/test

nick@asdf:~/code/scala.js/fbn$ sbt server/test
[info] welcome to sbt 1.6.2 (Eclipse Adoptium Java 11.0.16)
[info] loading settings for project global-plugins from plugins.sbt ...
[info] loading global plugins from /home/nick/.sbt/1.0/plugins
[info] loading settings for project fbn-build from plugins.sbt ...
[info] loading project definition from /home/nick/code/scala.js/fbn/project
[info] loading settings for project root from build.sbt ...
[info] BuildInfo settings:
[info] (apiUrl,None)
[info] BuildInfo settings:
[info] (apiUrl,None)
[info] set current project to root (in build file:/home/nick/code/scala.js/fbn/)
[warn] there are 8 keys that are not used by any other settings/tasks:
[warn]  
[warn] * admin / Compile / fastOptJS / webpackExtraArgs
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:199
[warn] * admin / Compile / fullOptJS / webpackExtraArgs
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:200
[warn] * apiJS / Compile / stMinimize
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:274
[warn] * commonJS / Compile / stMinimize
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:249
[warn] * ui / Compile / stMinimize
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:310
[warn] * web / Compile / fastOptJS / webpackExtraArgs
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:199
[warn] * web / Compile / fullOptJS / webpackExtraArgs
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:200
[warn] * web / Compile / stMinimize
[warn]   +- /home/nick/code/scala.js/fbn/build.sbt:388
[warn]  
[warn] note: a setting might still be used by a command; to exclude a key from this `lintUnused` check
[warn] either append it to `Global / excludeLintKeys` or call .withRank(KeyRanks.Invisible) on the key
[info] compiling 3 Scala sources to /home/nick/code/scala.js/fbn/server/target/scala-2.13/classes ...
java.lang.ClassNotFoundException: Instant
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
  | => sat java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	at io.swagger.util.ReflectionUtils.loadClassByName(ReflectionUtils.java:53)
	at io.swagger.jackson.ModelResolver.getInnerType(ModelResolver.java:932)
	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:468)
	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:203)
	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolve(SwaggerScalaModelConverter.scala:90)
	at com.github.dwickern.swagger.ValidationModelConverter.resolve(ValidationModelConverter.scala:63)
	at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:103)
	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:257)
	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:203)
	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolve(SwaggerScalaModelConverter.scala:90)
	at com.github.dwickern.swagger.ValidationModelConverter.resolve(ValidationModelConverter.scala:63)
	at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:103)
	at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:175)
	at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:126)
	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolveProperty(SwaggerScalaModelConverter.scala:70)
	at com.github.dwickern.swagger.ValidationModelConverter.resolveProperty(ValidationModelConverter.scala:59)
	at io.swagger.converter.ModelConverterContextImpl.resolveProperty(ModelConverterContextImpl.java:83)
	at io.swagger.converter.ModelConverters.readAsProperty(ModelConverters.java:63)
	at io.swagger.converter.ModelConverters.readAsProperty(ModelConverters.java:57)
	at io.swagger.util.ParameterProcessor.applyAnnotations(ParameterProcessor.java:263)
	at play.modules.swagger.PlayReader.readImplicitParam(PlayReader.java:441)
	at play.modules.swagger.PlayReader.readImplicitParameters(PlayReader.java:408)
	at play.modules.swagger.PlayReader.read(PlayReader.java:208)
	at play.modules.swagger.PlayReader.read(PlayReader.java:76)
	at play.modules.swagger.PlayReader.read(PlayReader.java:70)
	at play.modules.swagger.ApiListingCache.$anonfun$listing$1(ApiListingCache.scala:17)
	at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:454)
	at play.modules.swagger.ApiListingCache.listing(ApiListingCache.scala:13)
	at com.github.dwickern.swagger.SwaggerRunner$.run(SwaggerRunner.scala:31)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at com.github.dwickern.sbt.SwaggerPlayPlugin$.$anonfun$projectSettings$12(SwaggerPlayPlugin.scala:87)
	at com.github.dwickern.sbt.SwaggerPlayPlugin$$anon$2.run(SwaggerPlayPlugin.scala:172)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at com.github.dwickern.sbt.SwaggerPlayPlugin$.withContextClassLoader(SwaggerPlayPlugin.scala:175)
	at com.github.dwickern.sbt.SwaggerPlayPlugin$.$anonfun$projectSettings$11(SwaggerPlayPlugin.scala:79)
	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
	at sbt.std.Transform$$anon$4.work(Transform.scala:68)
	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
	at sbt.Execute.work(Execute.scala:291)
	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
[error] java.lang.IllegalArgumentException: argument "t" is null
[error] 	at com.fasterxml.jackson.databind.ObjectMapper._assertNotNull(ObjectMapper.java:4737)
[error] 	at com.fasterxml.jackson.databind.ObjectMapper.constructType(ObjectMapper.java:2116)
[error] 	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolveProperty(SwaggerScalaModelConverter.scala:24)
[error] 	at com.github.dwickern.swagger.ValidationModelConverter.resolveProperty(ValidationModelConverter.scala:59)
[error] 	at io.swagger.converter.ModelConverterContextImpl.resolveProperty(ModelConverterContextImpl.java:83)
[error] 	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:469)
[error] 	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:203)
[error] 	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolve(SwaggerScalaModelConverter.scala:90)
[error] 	at com.github.dwickern.swagger.ValidationModelConverter.resolve(ValidationModelConverter.scala:63)
[error] 	at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:103)
[error] 	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:257)
[error] 	at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:203)
[error] 	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolve(SwaggerScalaModelConverter.scala:90)
[error] 	at com.github.dwickern.swagger.ValidationModelConverter.resolve(ValidationModelConverter.scala:63)
[error] 	at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:103)
[error] 	at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:175)
[error] 	at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:126)
[error] 	at io.swagger.scala.converter.SwaggerScalaModelConverter.resolveProperty(SwaggerScalaModelConverter.scala:70)
[error] 	at com.github.dwickern.swagger.ValidationModelConverter.resolveProperty(ValidationModelConverter.scala:59)
[error] 	at io.swagger.converter.ModelConverterContextImpl.resolveProperty(ModelConverterContextImpl.java:83)
[error] 	at io.swagger.converter.ModelConverters.readAsProperty(ModelConverters.java:63)
[error] 	at io.swagger.converter.ModelConverters.readAsProperty(ModelConverters.java:57)
[error] 	at io.swagger.util.ParameterProcessor.applyAnnotations(ParameterProcessor.java:263)
[error] 	at play.modules.swagger.PlayReader.readImplicitParam(PlayReader.java:441)
[error] 	at play.modules.swagger.PlayReader.readImplicitParameters(PlayReader.java:408)
[error] 	at play.modules.swagger.PlayReader.read(PlayReader.java:208)
[error] 	at play.modules.swagger.PlayReader.read(PlayReader.java:76)
[error] 	at play.modules.swagger.PlayReader.read(PlayReader.java:70)
[error] 	at play.modules.swagger.ApiListingCache.$anonfun$listing$1(ApiListingCache.scala:17)
[error] 	at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:454)
[error] 	at play.modules.swagger.ApiListingCache.listing(ApiListingCache.scala:13)
[error] 	at com.github.dwickern.swagger.SwaggerRunner$.run(SwaggerRunner.scala:31)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
[error] 	at com.github.dwickern.sbt.SwaggerPlayPlugin$.$anonfun$projectSettings$12(SwaggerPlayPlugin.scala:87)
[error] 	at com.github.dwickern.sbt.SwaggerPlayPlugin$$anon$2.run(SwaggerPlayPlugin.scala:172)
[error] 	at java.base/java.security.AccessController.doPrivileged(Native Method)
[error] 	at com.github.dwickern.sbt.SwaggerPlayPlugin$.withContextClassLoader(SwaggerPlayPlugin.scala:175)
[error] 	at com.github.dwickern.sbt.SwaggerPlayPlugin$.$anonfun$projectSettings$11(SwaggerPlayPlugin.scala:79)
[error] 	at scala.Function1.$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$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:829)
[error] (server / swaggerPlayJson) java.lang.IllegalArgumentException: argument "t" is null
[error] Total time: 9 s, completed Oct 8, 2022, 12:51:06 PM
nick@asdf:~/code/scala.js/fbn$ 

[AlexITC]

Oh, I have saw similar errors, please remove any swagger annotations you changed/added to your controller, there are tricky cases that I must document.

[nickcoast]

I've made a lot of progress since removing those annotations. They were indeed causing that issue.

Could you please give me a hint about creating a modal dialog in scala.js? Do I need to add a new library to build.sbt?

Thank you much

[AlexITC]

The project already has everything from https://v3.mui.com/ available, in particular, check dialogs, I have another project where such a component is used.

Good luck!

[nickcoast]

Thanks! One more quick question if you have the time.

Should I be using UUID primary keys for all DB tables? Seems the Admin interface only allows viewing individual records for tables with UUID primary keys.