[GitHub] [arrow] dafeiw opened a new issue, #35960: [Java] Accounted size went negative when locallyHeldMemory overflow

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

dafeiw opened a new issue, #35960:
URL: https://github.com/apache/arrow/issues/35960

   ### Describe the bug, including details regarding any error messages, version, and platform.
   
   The following code will throw `Accounted size went negative` exception.
   The buffer allocator `a` will ask its parent allocator to do allocation, however the `locallyHeldMemory` of parent allocator already reaches `Long.MAX_VALUE` when creating child actor `ChildB`
   
   ```
           RootAllocator parentAllocator  = new RootAllocator();
           BufferAllocator a = parentAllocator.newChildAllocator("ChildA", 0, Long.MAX_VALUE);
           BufferAllocator b = parentAllocator.newChildAllocator("ChildB", Long.MAX_VALUE, Long.MAX_VALUE);
           IntVector intVector = new IntVector("intVector", a);
           intVector.allocateNew(1);
           intVector.set(0, 2);
           intVector.setValueCount(1);
   
           IntVector intVector2 = new IntVector("intVector2", a);
           intVector2.allocateNew(1);
           intVector2.set(0, 2);
           intVector2.setValueCount(1);
   
           intVector.close();
           intVector2.close();
           a.close();
           b.close();
   ```
   
   ### Component(s)
   
   Java


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[GitHub] [arrow] lidavidm closed issue #35960: [Java] Accounted size went negative when locallyHeldMemory overflow

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

lidavidm closed issue #35960: [Java] Accounted size went negative when locallyHeldMemory overflow
URL: https://github.com/apache/arrow/issues/35960


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[GitHub] [arrow] lidavidm commented on issue #35960: [Java] Accounted size went negative when locallyHeldMemory overflow

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

lidavidm commented on issue #35960:
URL: https://github.com/apache/arrow/issues/35960#issuecomment-1582507207

   Thanks! It seems likely there's an underflow or overflow here. (I'm curious why it lets you allocate from `a` in the first place, so I'll dig into that too; there's an "overlimit" situation but AFAIK it only applies when transferring buffers between allocators)


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