pitrou commented on code in PR #13246:
URL: https://github.com/apache/arrow/pull/13246#discussion_r884967137
##########
cpp/src/jni/dataset/jni_util.cc:
##########
@@ -167,9 +167,16 @@
ReservationListenableMemoryPool::~ReservationListenableMemoryPool() {}
Status CheckException(JNIEnv* env) {
if (env->ExceptionCheck()) {
- env->ExceptionDescribe();
+ jthrowable t = env->ExceptionOccurred();
env->ExceptionClear();
- return Status::Invalid("Error during calling Java code from native code");
+ jclass describer_class =
+ env->FindClass("org/apache/arrow/dataset/jni/JniExceptionDescriber");
+ jmethodID describe_method = env->GetStaticMethodID(
+ describer_class, "describe",
"(Ljava/lang/Throwable;)Ljava/lang/String;");
+ std::string description = JStringToCString(
+ env, (jstring)env->CallStaticObjectMethod(describer_class,
describe_method, t));
+ return Status::Invalid("Error during calling Java code from native code: "
+
+ description);
Review Comment:
Hmm... I don't know what is possible exactly, but ideally we should:
1) map Java exception classes to specific C++ status codes (for example
`IOException` would map to `Status::IOError` while `InvalidTypeException` would
map to `Status::TypeError`)
2) keep the Java exception object in a Java-specific `StatusDetail`
subclass, just like we do [for Python
exceptions](https://github.com/apache/arrow/blob/01d8485d17adacbe75dac2a9b97c34dc28ca31f5/cpp/src/arrow/python/common.cc#L54-L139)
cc @lwhite1
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