Spotless failed with OutOfMemory on large project

[AlexeyKuznetsov-DD]

I do not have reproducer yet, as it is failing only on GitLab CI and passing on my laptop, all I have is just a stack trace under Java 21, spotless version is 8.0.0.

It is actually working on spotless 6.13.0 and java 8.

java.lang.OutOfMemoryError: Java heap space
	at dev.equo.solstice.NestedJars.extractNestedJar(NestedJars.java:316)
	at dev.equo.solstice.NestedJars.extractAllNestedJars(NestedJars.java:293)
	at dev.equo.solstice.NestedJars.extractAllNestedJars(NestedJars.java:283)
	at com.diffplug.spotless.extra.EquoBasedStepBuilder.lambda$build$0(EquoBasedStepBuilder.java:144)
	at com.diffplug.spotless.extra.EquoBasedStepBuilder$$Lambda/0x00007d0d4dc68648.get(Unknown Source)
	at com.diffplug.spotless.JarState$Promised.get(JarState.java:74)
	at com.diffplug.spotless.extra.EquoBasedStepBuilder$EquoStep.state(EquoBasedStepBuilder.java:201)
	at com.diffplug.spotless.extra.EquoBasedStepBuilder$$Lambda/0x00007d0d4dc6a610.apply(Unknown Source)
	at com.diffplug.spotless.FormatterStepSerializationRoundtrip.stateSupplier(FormatterStepSerializationRoundtrip.java:59)
	at com.diffplug.spotless.FormatterStepSerializationRoundtrip$HackClone$$Lambda/0x00007d0d4e52fdc0.get(Unknown Source)
	at com.diffplug.spotless.ThrowingEx.get(ThrowingEx.java:67)
	at com.diffplug.spotless.FormatterStepSerializationRoundtrip$HackClone.writeObject(FormatterStepSerializationRoundtrip.java:115)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:154)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at com.diffplug.spotless.ConfigurationCacheHackList.writeObject(ConfigurationCacheHackList.java:76)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:154)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)

I could try to gather some dumps or maybe additional logs if you can suggest any.

[nedtwigg]

I can't tell if you're on gradle or maven, but either way you should be able to fix this with some -XX flags to add more memory.