[jira] [Created] (HIVE-29037) Incorrect time calculation in HiveSplitGenerator causing negative elapsed time in logs

["chiranjeevi (Jira)" <ji...@apache.org>]

chiranjeevi created HIVE-29037:
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             Summary: Incorrect time calculation in HiveSplitGenerator causing negative elapsed time in logs
                 Key: HIVE-29037
                 URL: https://issues.apache.org/jira/browse/HIVE-29037
             Project: Hive
          Issue Type: Bug
          Components: Hive
            Reporter: chiranjeevi


The HiveSplitGenerator class incorrectly calculates elapsed time for split serialization operations, resulting in negative time values in the logs. This makes debugging and performance analysis difficult.

The calculation fileWriteStarted - Time.monotonicNow() is reversed. Since Time.monotonicNow() returns the current time, which is always greater than fileWriteStarted (the time when the operation started), this calculation always produces a negative number.



```javascript
2025-06-21 16:43:28,637 [DEBUG] [HiveSplitGenerator.SplitSerializer Thread - #2] |tez.HiveSplitGenerator|: Split #41 event to output path: hdfs://clustername/tmp/hive/staging/.tez/application_1749793988888_0095/events/hive_20250621164323_c39588f6-0ae9-48ad-8db5-5e43cf4a1b1d/0_catalog_sales_InputDataInformationEvent_41 written in *-320 ms*
```

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