matthieun commented on code in PR #988:
URL: https://github.com/apache/parquet-mr/pull/988#discussion_r951648555
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parquet-protobuf/src/main/java/org/apache/parquet/proto/ProtoSchemaConverter.java:
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@@ -79,12 +80,20 @@ public MessageType convert(Class<? extends Message>
protobufClass) {
}
/* Iterates over list of fields. **/
- private <T> GroupBuilder<T> convertFields(GroupBuilder<T> groupBuilder,
List<FieldDescriptor> fieldDescriptors) {
+ private <T> GroupBuilder<T> convertFields(GroupBuilder<T> groupBuilder,
List<FieldDescriptor> fieldDescriptors, List<String> parentNames) {
for (FieldDescriptor fieldDescriptor : fieldDescriptors) {
- groupBuilder =
- addField(fieldDescriptor, groupBuilder)
+ final String name = fieldDescriptor.getFullName();
+ final List<String> newParentNames = new ArrayList<>(parentNames);
+ newParentNames.add(name);
+ if (parentNames.contains(name)) {
+ // Circular dependency, skip
+ LOG.warn("Breaking circular dependency:{}{}", System.lineSeparator(),
Review Comment:
It is possible to create circular dependencies, that is the problem. I am
not sure in what case they would be useful, however since they can exist,
parquet should not fail with `StackOverflowError` when it encounters them 😄
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