Hermes 0.7.2 : Max heap size was exceeded about hermes

[tmikov]

This error message indicates that you have attempted to allocate more memory than the configured Hermes GC heap size, so it usually indicates a problem in user code not an engine bug. The heap size is configured using RuntimeConfig/GCConfig.

For Hermes 0.7.2:

hermes/public/hermes/Public/GCConfig.h

Line 102 in 22af9a3

F(constexpr, gcheapsize_t, MaxHeapSize, 512 << 20) \

As you can see the default is 512MB, which is probably low these days. However React Native is potentially overwriting the value here:
https://github.com/facebook/react-native/blob/0645c38014e8310d8e387dabc860c8c5878beb6e/ReactAndroid/src/main/java/com/facebook/hermes/reactexecutor/OnLoad.cpp#L45

Which seems to be called from here with 1GB size:
https://github.com/facebook/react-native/blob/0645c38014e8310d8e387dabc860c8c5878beb6e/ReactAndroid/src/main/java/com/facebook/hermes/reactexecutor/HermesExecutorFactory.java#L20

You can try changing these values.

Please, keep in mind that, as our issue template states, we are unable to help debug problems with previous Hermes versions , and we are not experts on React Native, so we can't debug React Native issues at all.

[mattbfb]

Does any of the error information presented (either via the RN app, or adb log) give an indication of the amount of memory being used?

Additionally, I see you're on quite an old version (RN 0.64.4), which makes it trickier to investigate issues. Does this issue still occur on current versions?

[atoui-zahreddine]

Sorry I forgot to mention the error message from google play console :

[split_config.arm64_v8a.apk!libhermes.so] facebook::hermes::HermesRuntimeImpl::call(facebook::jsi::Function const&, facebook::jsi::Value const&, facebook::jsi::Value const*, unsigned long) SIGABRT

the majority of the crashes happens on Samsung devices .

I couldn't upgrade the project to current versions because It's needs a lot of work on the third party libraries since the project is quite old.

I'm not sure about how I can reproduce the issue, it will very helpful if you guide please.

[atoui-zahreddine]

Thanks a lot, this is more then helpful, I'll try to change these values and see if the crash still occurs .

UPDATE :
After changing the value to 3gb ( which is unlimited ) the crash is gone

-    this(new RuntimeConfig(1024));
+    this(new RuntimeConfig(3072));

https://github.com/facebook/react-native/blob/0645c38014e8310d8e387dabc860c8c5878beb6e/ReactAndroid/src/main/java/com/facebook/hermes/reactexecutor/HermesExecutorFactory.java#L20