"anvil-app-server" fails with java error

Anvil Q&A
1

Hi there, sorry if this sounds like a newbie question. I’m trying to run my first Anvil app in a fresh new venv. I have amazon corretto 16 installed (with JAVA_HOME and PATH env vars properly set), have sucessfully created the app, downloaded the anvil server JAR file, but getting this error when I run anvil-app-server --app Test:

Exception in thread "main" java.lang.ExceptionInInitializerError
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:466)
        at clojure.lang.RT.classForName(RT.java:2204)
        at clojure.lang.RT.classForName(RT.java:2213)
        at clojure.lang.RT.loadClassForName(RT.java:2232)
        at clojure.lang.RT.load(RT.java:450)
        at clojure.lang.RT.load(RT.java:426)
        at clojure.core$load$fn__6548.invoke(core.clj:6046)
        at clojure.core$load.invokeStatic(core.clj:6045)
        at clojure.core$load.doInvoke(core.clj:6029)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invokeStatic(core.clj:5848)
        at clojure.core$load_one.invoke(core.clj:5843)
        at clojure.core$load_lib$fn__6493.invoke(core.clj:5888)
        at clojure.core$load_lib.invokeStatic(core.clj:5887)
        at clojure.core$load_lib.doInvoke(core.clj:5868)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invokeStatic(core.clj:659)
        at clojure.core$load_libs.invokeStatic(core.clj:5925)
        at clojure.core$load_libs.doInvoke(core.clj:5909)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invokeStatic(core.clj:659)
        at clojure.core$require.invokeStatic(core.clj:5947)
        at clojure.core$require.doInvoke(core.clj:5947)
        at clojure.lang.RestFn.invoke(RestFn.java:619)
        at anvil.app_server.tables$loading__6434__auto____656.invoke(tables.clj:1)
        at anvil.app_server.tables__init.load(Unknown Source)
        at anvil.app_server.tables__init.<clinit>(Unknown Source)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:466)
        at clojure.lang.RT.classForName(RT.java:2204)
        at clojure.lang.RT.classForName(RT.java:2213)
        at clojure.lang.RT.loadClassForName(RT.java:2232)
        at clojure.lang.RT.load(RT.java:450)
        at clojure.lang.RT.load(RT.java:426)
        at clojure.core$load$fn__6548.invoke(core.clj:6046)
        at clojure.core$load.invokeStatic(core.clj:6045)
        at clojure.core$load.doInvoke(core.clj:6029)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invokeStatic(core.clj:5848)
        at clojure.core$load_one.invoke(core.clj:5843)
        at clojure.core$load_lib$fn__6493.invoke(core.clj:5888)
        at clojure.core$load_lib.invokeStatic(core.clj:5887)
        at clojure.core$load_lib.doInvoke(core.clj:5868)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invokeStatic(core.clj:659)
        at clojure.core$load_libs.invokeStatic(core.clj:5925)
        at clojure.core$load_libs.doInvoke(core.clj:5909)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invokeStatic(core.clj:659)
        at clojure.core$require.invokeStatic(core.clj:5947)
        at clojure.core$require.doInvoke(core.clj:5947)
        at clojure.lang.RestFn.invoke(RestFn.java:3894)
        at anvil.app_server.run$loading__6434__auto____319.invoke(run.clj:1)
        at anvil.app_server.run__init.load(Unknown Source)
        at anvil.app_server.run__init.<clinit>(Unknown Source)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:466)
        at clojure.lang.RT.classForName(RT.java:2204)
        at clojure.lang.RT.classForName(RT.java:2213)
        at clojure.lang.RT.loadClassForName(RT.java:2232)
        at clojure.lang.RT.load(RT.java:450)
        at clojure.lang.RT.load(RT.java:426)
        at clojure.core$load$fn__6548.invoke(core.clj:6046)
        at clojure.core$load.invokeStatic(core.clj:6045)
        at clojure.core$load.doInvoke(core.clj:6029)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.lang.Var.invoke(Var.java:381)
        at clojure.lang.Util.loadWithClass(Util.java:250)
        at anvil.app_server.run.<clinit>(Unknown Source)
Caused by: java.lang.NumberFormatException: null
        at java.base/java.lang.Integer.parseInt(Integer.java:622)
        at java.base/java.lang.Integer.parseInt(Integer.java:778)
        at anvil.util$get_java_version.invokeStatic(util.clj:37)
        at anvil.util$get_java_version.invoke(util.clj:34)
        at anvil.util$fn__633.invokeStatic(util.clj:41)
        at anvil.util$fn__633.invoke(util.clj:41)
        at anvil.util__init.load(Unknown Source)
        at anvil.util__init.<clinit>(Unknown Source)
        ... 70 more

This is Windows 10 and python 3.7.4 btw. Any ideas?
thank you.

2

What parameters are you passing into the app server on launch? and have you modified any of the yaml files after git cloning?

3

My venv folder is called “Test”, my app name is also called “Test”, and I cloned git to “Test\Apps\Test”.
I didn’t change any yaml files, and not passing any extra parameters for the app server. Simply running:
anvil-app-server --app Test

Also tried creating a blank app, instead of cloning from git, using:
create-anvil-app blank Test
which runs fine and creates the app.

But then got the same error upon launching the server.

4

Hi @fabricio.chamon,

Thanks for posting this.

This is a known bug caused by the latest version of Java, which has changed how it reports its own version number. We have a fix that will go live with the next release of the App Server.

In the meantime, you should be able to work around the problem by using Java 11.

5

Hi @ryan,

When can we expect the next release of the App Server?
I’m waiting on another fix that is done but not yet released.

I don’t expect an exact date and I won’t hold you to it anyway - just an idea if it’s imminent or months away would be useful.

Thanks

6

Dear @ryan,

Thank you for the response, as you mentioned we can work around this issue by using java11.

as I download the openjdk 11 and use the same step to setup a todolist app, but this problem still happened.

do you have any ieda on this.

thanks for helping.