4.1.0

• Fixed unbounded off-heap memory growth when initializing the reader in
  FileMode.MEMORY. The previous implementation read the database via
  FileChannel.read() into a heap buffer, which causes the JDK to cache
  temporary direct ByteBuffers in per-thread storage
  (sun.nio.ch.Util.BufferCache). Repeated initialization across different
  threads could grow this cache without bound. The reader now uses
  FileInputStream for MEMORY mode, which bypasses the cache.
  FileMode.MEMORY_MAPPED was unaffected.
• Fixed a latent short-read bug in the multi-chunk FileMode.MEMORY
  load path introduced in 4.0.0. FileChannel.read(ByteBuffer) is not
  contractually obligated to fully fill the destination buffer; a
  short read could have caused silent truncation of an in-memory
  database. Affects databases larger than ~2GB (the default chunk
  size). The new chunked read loop retries until each chunk is fully
  populated.