Hi all, I am Jiashen and I am currently working on updating Parquet version. We've added a feature for cell level encryption <https://docs.google.com/document/d/1WCBhdBXpDbxUck0B4CDiUf9E08n6dyapYPRhmAS7tXQ/edit> in version 1.10. Now, we're in the process of upgrading from Parquet version 1.10 to 1.13.1. However, we've encountered an issue: an *assertion* introduced with the Column Indexes feature (diff <https://github.com/apache/parquet-mr/pull/507/files>) is causing one of our unit tests to fail. We suspect it might be due to the cell level encryption not meeting the Page Index's requirements, specifically that a page cannot start with a null value. Unfortunately, we haven't been able to find the exact cause of this issue and would greatly appreciate your help in investigating it. Could you please help take a look at this problem?
Code: https://github.com/zhangjiashen/parquet-mr/commit/ce3b0f8aa2140c75f93db2eb7917cd24dc569323#diff-a24f1094ef9f914a638875e664fc411dcca320076d41227b120d1a2c8d1c3d96 The unit test triggers assertion：parquet-hadoop/src/test/java/org/apache/parquet/crypto/CellEncryptionTest.java， *testManySubGroups()* Cell Encryption Writer and Reader: https://docs.google.com/document/d/1WCBhdBXpDbxUck0B4CDiUf9E08n6dyapYPRhmAS7tXQ/edit -- Thanks, Jiashen
