lriggs opened a new issue, #48039:
URL: https://github.com/apache/arrow/issues/48039

   ### Describe the enhancement requested
   
   ### Describe the enhancement requested
   My company's product uses Gandiva and I recently ran into a bug involving 
Gandiva, the ORC v2/LLJIT compiler and LLVM versions. I was not able to write a 
unit test to reproduce the bug outside of our code, though I believe there is a 
high potential for it to reproduce. It is a memory leak, eventually leading to 
a crash after running several thousand queries. It only occurred on x86 
architectures.
   
   One caveat is that LLVM 21 has not been updated in VCPKG yet. There is a 
[draft PR](https://github.com/microsoft/vcpkg/pull/47287) but it is possible to 
do the upgrade in Gandiva now since the underlying LLVM packages have been 
published to the VCPKG servers. I have tested this locally using a VCPKG 
overlay in my local arrow repo. Here is a [draft PR 
](https://github.com/apache/arrow/pull/48038) showing how it can be done.
   
   Thank you for your consideration!
   
   ### Component(s)
   C++
   Gandiva
   
   ### Component(s)
   
   C++


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