log failure reason if JNI_OnLoad fails (#668)

Author: snowp

platform/jvm/src/jni.rs

@@ -193,7 +193,7 @@ static STACK_TRACE_PROVIDER_INVOKE: OnceLock<CachedMethod> = OnceLock::new();
 pub(crate) fn initialize_method_handle<
   'local,
   'other_local,
-  T: Desc<'local, JClass<'other_local>> + std::fmt::Debug + Copy,
+  T: Desc<'local, JClass<'other_local>>,
 >(
   env: &mut JNIEnv<'local>,
   class: T,
@@ -204,7 +204,6 @@ pub(crate) fn initialize_method_handle<
   let method_id = CachedMethod::new(env, class, method_name, signature);
 
   let Ok(cached_id) = method_id else {
-    log::error!("failed to resolve {class:?}::{method_name} with signature {signature}");
     check_exception(env);
     bail!("failed to resolve method");
   };
@@ -337,7 +336,10 @@ fn jni_load_inner(vm: &JavaVM) -> anyhow::Result<jint> {
 
 #[no_mangle]
 pub extern "system" fn JNI_OnLoad(vm: JavaVM, _: *mut c_void) -> jint {
-  jni_load_inner(&vm).unwrap_or(JNI_ERR)
+  initialize_logging();
+  jni_load_inner(&vm)
+    .inspect_err(|e| log::error!("JNI_OnLoad failed: {e}"))
+    .unwrap_or(JNI_ERR)
 }
 
 //
@@ -600,8 +602,6 @@ pub extern "system" fn Java_io_bitdrift_capture_CaptureJniLibrary_createLogger(
   error_reporter: JObject<'_>,
   start_in_sleep_mode: jboolean,
 ) -> jlong {
-  initialize_logging();
-
   with_handle_unexpected_or(
     || {
       let sdk_directory = PathBuf::from(