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Posted to jira@arrow.apache.org by "Matt DePero (Jira)" <ji...@apache.org> on 2022/07/05 22:40:00 UTC

[jira] [Created] (ARROW-16983) Delta byte array encoder broken due to memory leak

Matt DePero created ARROW-16983:
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             Summary: Delta byte array encoder broken due to memory leak
                 Key: ARROW-16983
                 URL: https://issues.apache.org/jira/browse/ARROW-16983
             Project: Apache Arrow
          Issue Type: Bug
          Components: Go, Parquet
            Reporter: Matt DePero


The `DeltaByteArrayEncoder` has a memory leak due to a bug in how `EstimatedDataEncodedSize` is calculated. DeltaByteArrayEncoder extends `encoder` which calculates EstimatedDataEncodedSize by calling `Len()` on its `PooledBufferWriter` sink. DeltaByteArrayEncoder however does not write data to sink, instead writing data to `prefixEncoder` and `suffixEncoder` causing EstimatedDataEncodedSize to always return zero. 



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