dang-stripe commented on issue #14067:
URL: https://github.com/apache/pinot/issues/14067#issuecomment-2372473553

   We've managed to hit this exception in our test clusters on 1.2 as well w/ 
snapshot + preload. I haven't been able to reproduce it yet though. The 
segments were in ERROR state.
   
   The only relevant logs seem to be these snapshot failures, but I do not see 
any `Caught exception while taking snapshot` logs from 
https://github.com/apache/pinot/blob/master/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/BasePartitionUpsertMetadataManager.java
   ```
   [2024-09-23 15:15:23.682414] INFO 
[setup_attempts_REALTIME-327710-ConcurrentMapPartitionUpsertMetadataManager] 
[setup_attempts__327710__147__20240923T1515Z:138928] Taking snapshot for 147 
segments
   [2024-09-23 15:15:23.682430] INFO [ImmutableSegmentImpl] 
[setup_attempts__327710__147__20240923T1515Z:25] Persisted validDocIds for 
segment: setup_attempts__327710__146__20240923T1115Z with: 3 valid docs
   [2024-09-23 15:15:23.682447] WARN 
[setup_attempts_REALTIME-327710-ConcurrentMapPartitionUpsertMetadataManager] 
[setup_attempts__327710__147__20240923T1515Z:138928] Missed taking snapshot for 
146 immutable segments
   [2024-09-23 15:15:23.682466] INFO 
[setup_attempts_REALTIME-327710-ConcurrentMapPartitionUpsertMetadataManager] 
[setup_attempts__327710__147__20240923T1515Z:138928] Finished taking snapshot 
for 1 immutable segments with 3 primary keys (out of 147 total segments, 0 are 
consuming segments) in 1 ms
   ```
   
   


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