[GitHub] [lucene] mikemccand commented on issue #12185: Using DirectIODirectory results in BufferOverflowException

["mikemccand (via GitHub)" <gi...@apache.org>]

mikemccand commented on issue #12185:
URL: https://github.com/apache/lucene/issues/12185#issuecomment-1469863743

   Hmm, I think the root cause exception is essentially [thrown from here](https://github.com/openjdk/jdk17/blob/master/src/java.base/share/classes/java/nio/Buffer.java#L722), which means it looks like `DirectIOIndexOutput` failed to flush its direct `ByteBuffer` when it was full.  Not sure how that could happen on quickly staring at the code.
   
   Does this consistently reproduce?  Looks like you are using `SerialMergeScheduler` so maybe it does (no thread scheduling "randomness")?
   
   Which JDK are you running?  And which Linux flavor/version?


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