The minimum heap space and configuration need to run more than 13 selections

[cwichoski]

Hi

I build and run jhipster and got OutOfMemory error, then changed to increase memory to 4Gb with follow command:

jhipster-lite$ java -Xmx4096m -Xms4096m -jar target/*.jar

but still getting OutOfMemory when try to generate the code.

Here is the partial exception

java.lang.OutOfMemoryError: Java heap space
	at java.base/java.util.Arrays.copyOf(Arrays.java:3595)
	at java.base/java.lang.StringLatin1.replace(StringLatin1.java:345)
	at java.base/java.lang.String.replace(String.java:3100)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.applyIndentation(MavenCommandHandler.java:447)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.writePom(MavenCommandHandler.java:437)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.addDependencyTo(MavenCommandHandler.java:279)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.handle(MavenCommandHandler.java:268)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler.handle(FileSystemJavaBuildCommandsHandler.java:76)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler.lambda$handle$0(FileSystemJavaBuildCommandsHandler.java:51)

I'm using:

branch main
JDK 21.0.3-tem
maven 3.9.7
nodejs 18.16.0

Any idea?

[renanfranca]

Hello @cwichoski ,

Thank you for getting in touch.

The minimum heap space and configuration need to run more than 13 selections

What do you mean about 13 selections? Can you share a printscreen?

Thanks 😁

[cwichoski]

like @pascalgrimaud send bellow

[pascalgrimaud]

Just used the same command than you:

I managed to apply the 15 modules without any memory problem:

[cwichoski]

1. First try I used exactly what @pascalgrimaud set, works
2. Stop to start from scratch and select same thing again, without maven-wrapper, works
3. Without stop selected other modules, like more things to use postgresql stuff and to get samples, works
4. But something strange happen the cpu started to boost and browser got slow, I just ignore
5. Then I changed the field values for ones more focused on app I wish to make the POC, from that I got the OutOfMemory exception on print.

[cwichoski]

I was able to inspect the Heap Dump of OutOfMemory crash, and found there is an StringWriter with more than 1GB in a try to create the pom.xml file, but with many spaces inside, appears to be a problem with identation when I changed from 2 to 4. Here a print from GHex that show the content of the string inspected:

and here the dominator tree:

java.lang.OutOfMemoryError: Java heap space
	at java.base/java.util.Arrays.copyOf(Arrays.java:3595)
	at java.base/java.lang.StringLatin1.replace(StringLatin1.java:345)
	at java.base/java.lang.String.replace(String.java:3100)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.applyIndentation(MavenCommandHandler.java:447)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.writePom(MavenCommandHandler.java:437)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.removeDependencyFrom(MavenCommandHandler.java:159)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.handle(MavenCommandHandler.java:148)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler.handle(FileSystemJavaBuildCommandsHandler.java:75)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler.lambda$handle$0(FileSystemJavaBuildCommandsHandler.java:51)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler$$Lambda/0x0000746c30802508.accept(Unknown Source)
	at java.base/java.lang.Iterable.forEach(Iterable.java:75)
	at java.base/java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1116)
	at tech.jhipster.lite.module.infrastructure.secondary.javadependency.FileSystemJavaBuildCommandsHandler.handle(FileSystemJavaBuildCommandsHandler.java:51)
	at tech.jhipster.lite.module.infrastructure.secondary.FileSystemJHipsterModulesRepository.apply(FileSystemJHipsterModulesRepository.java:87)
	at java.base/java.lang.invoke.DirectMethodHandle$Holder.invokeVirtual(DirectMethodHandle$Holder)
	at java.base/java.lang.invoke.LambdaForm$MH/0x0000746c30191800.invoke(LambdaForm$MH)
	at java.base/java.lang.invoke.Invokers$Holder.invokeExact_MT(Invokers$Holder)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:154)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:354)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:720)
	at tech.jhipster.lite.module.infrastructure.secondary.FileSystemJHipsterModulesRepository$$SpringCGLIB$$0.apply(<generated>)
	at tech.jhipster.lite.module.domain.JHipsterModulesApplyer.apply(JHipsterModulesApplyer.java:105)
	at tech.jhipster.lite.module.domain.JHipsterModulesApplyer$$Lambda/0x0000746c307641f0.apply(Unknown Source)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)

With that there is something wrong with

tech.jhipster.lite.module.infrastructure.secondary.javadependency.maven.MavenCommandHandler.applyIndentation(MavenCommandHandler.java:447)

[cwichoski]

In a try to debug the problem I created some output to get how pomContent increases on the source[1].

passCount	spacesCount	spaces.length	repeat.length	pomContent.length
1	4	4	2	1544
2	4	4	2	1808
3	4	4	2	2522
4	4	4	2	3474
5	4	4	2	6044
6	4	4	2	10534
7	4	4	2	21513
8	4	4	2	41651
9	4	4	2	82424
10	4	4	2	418703
11	4	4	2	838601
12	4	4	2	1821872
13	4	4	2	3656937
14	4	4	2	8113651
15	4	4	2	16289324
16	4	4	2	41226311
17	4	4	2	83759241
18	4	4	2	170922269
19	4	4	2	342888787
20	4	4	2	668995749

[1] https://github.com/jhipster/jhipster-lite/blob/main/src/main/java/tech/jhipster/lite/module/infrastructure/secondary/javadependency/maven/MavenCommandHandler.java#L447

[pascalgrimaud]

confirmed and fixed by #10143