datasketches-memory-java8/src/main/java/org/apache/datasketches/memory/internal/BBWritableBufferImpl.java [57:74]:
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    if ((this.owner != null) && (this.owner != Thread.currentThread())) {
      throw new IllegalStateException(THREAD_EXCEPTION_TEXT);
    }
    this.owner = Thread.currentThread(); //in ResourceImpl
  }

  @Override
  BaseWritableBufferImpl toWritableRegion(
      final long regionOffsetBytes,
      final long capacityBytes,
      final boolean readOnly,
      final ByteOrder byteOrder) {
    final long newOffsetBytes = offsetBytes + regionOffsetBytes;
    final long newCumOffsetBytes = cumOffsetBytes + regionOffsetBytes;
    int typeIdOut = removeNnBuf(typeId) | BUFFER | REGION | (readOnly ? READONLY : 0);

    if (Util.isNativeByteOrder(byteOrder)) {
      typeIdOut |= NATIVE;
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datasketches-memory-java8/src/main/java/org/apache/datasketches/memory/internal/DirectNonNativeWritableBufferImpl.java [50:67]:
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    if ((this.owner != null) && (this.owner != Thread.currentThread())) {
      throw new IllegalStateException(THREAD_EXCEPTION_TEXT);
    }
    this.owner = Thread.currentThread();
  }

  @Override
  BaseWritableBufferImpl toWritableRegion(
      final long regionOffsetBytes,
      final long capacityBytes,
      final boolean readOnly,
      final ByteOrder byteOrder) {
    final long newOffsetBytes = offsetBytes + regionOffsetBytes;
    final long newCumOffsetBytes = cumOffsetBytes + regionOffsetBytes;
    int typeIdOut = removeNnBuf(typeId) | BUFFER | REGION | (readOnly ? READONLY : 0);

    if (Util.isNativeByteOrder(byteOrder)) {
      typeIdOut |= NATIVE;
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