gianm opened a new issue #9097: S3: Infinite loop when listing prefixes that 
need multiple batches
URL: https://github.com/apache/druid/issues/9097
 
 
   `S3Utils.lazyFetchingObjectSummariesIterator` and 
`S3Utils.objectSummaryIterator` (used for listing prefixes by S3InputSource and 
StaticS3FirehoseFactory) both have a bug where they do something like this:
   
   ```java
   if (result.isTruncated()) {
     request.setContinuationToken(result.getContinuationToken());
   }
   ```
   
   i.e. they make follow-on requests based on the continuation token of the 
prior result. But this is wrong, since they should do it based on the _next_ 
continuation token: `result.getNextContinuationToken()`. This leads to an 
infinite loop if more than one batch is needed.

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