[android] check if the CustomGeometrySource's java peer is valid when the thread is shutting down

1 files changed, 12 insertions, 2 deletions

diff --git a/platform/android/src/style/sources/custom_geometry_source.cpp b/platform/android/src/style/sources/custom_geometry_source.cpp
index 057f5c99ba..dccca4cf46 100644
--- a/platform/android/src/style/sources/custom_geometry_source.cpp
+++ b/platform/android/src/style/sources/custom_geometry_source.cpp
@@ -65,7 +65,12 @@ namespace android {
         static auto& javaClass = jni::Class<CustomGeometrySource>::Singleton(*_env);
         static auto fetchTile = javaClass.GetMethod<void (jni::jint, jni::jint, jni::jint)>(*_env, "fetchTile");
 
-        assert(javaPeer);
+        // The source is removed on the main thread, but it still exists on the Render thread until the frame is complete.
+        // This might cause fetchTile/cancelTile invocations when the Java thread is shutting down and the peer has already been released.
+        // See https://github.com/mapbox/mapbox-gl-native/issues/12551.
+        if(!javaPeer) {
+            return;
+        }
 
         auto peer = jni::Cast(*_env, javaClass, javaPeer);
         peer.Call(*_env, fetchTile, (int)tileID.z, (int)tileID.x, (int)tileID.y);
@@ -77,7 +82,12 @@ namespace android {
         static auto& javaClass = jni::Class<CustomGeometrySource>::Singleton(*_env);
         static auto cancelTile = javaClass.GetMethod<void (jni::jint, jni::jint, jni::jint)>(*_env, "cancelTile");
 
-        assert(javaPeer);
+        // The source is removed on the main thread, but it still exists on the Render thread until the frame is complete.
+        // This might cause fetchTile/cancelTile invocations when the Java thread is shutting down and the peer has already been released.
+        // See https://github.com/mapbox/mapbox-gl-native/issues/12551.
+        if(!javaPeer) {
+            return;
+        }
 
         auto peer = jni::Cast(*_env, javaClass, javaPeer);
         peer.Call(*_env, cancelTile, (int)tileID.z, (int)tileID.x, (int)tileID.y);