somandal commented on code in PR #16002:
URL: https://github.com/apache/pinot/pull/16002#discussion_r2139082669


##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/creator/impl/inv/geospatial/BaseH3IndexCreator.java:
##########
@@ -104,12 +106,25 @@ public abstract class BaseH3IndexCreator implements 
GeoSpatialIndexCreator {
 
   @Override
   public Geometry deserialize(byte[] bytes) {
-    return GeometrySerializer.deserialize(bytes);
+    try {
+      return GeometrySerializer.deserialize(bytes);
+    } catch (Exception e) {
+      // For invalid serialized geometry, return null so that the doc can be 
skipped
+      return null;
+    }
   }
 
   @Override
   public void add(Geometry geometry)
       throws IOException {
+    if (geometry == null) {
+      ServerMetrics metrics = ServerMetrics.get();
+      if (metrics != null) {
+        metrics.addMeteredGlobalValue(ServerMeter.INDEXING_FAILURES, 1);

Review Comment:
   Can the `defaultNullValue` also be passed in? For some indexes like 
`LuceneTextIndexCreator` we probably want to add the `defaultNullValue` rather 
than skipping because the IndexReader takes the numDocs as input (and for this 
one it seems to fail if the numDocs don't match what we actually added). This 
strategy might not work for all scenarios though



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