dmitry-chirkov-dremio commented on PR #967:
URL: https://github.com/apache/arrow-java/pull/967#issuecomment-4738100465
We are troubleshooting a regression that ends up in following stack:
```
(java.lang.IndexOutOfBoundsException) readerIndex: 0, writerIndex: 4
(expected: 0 <= readerIndex <= writerIndex <= capacity(0))
io.netty.buffer.AbstractByteBuf.checkIndexBounds():112
io.netty.buffer.AbstractByteBuf.writerIndex():135
io.netty.buffer.NettyArrowBuf.writerIndex():215
io.netty.buffer.NettyArrowBuf.unwrapBuffer():631
```
Our starting point is
[this](https://github.com/dremio/dremio-oss/blob/799ccbda47e6f2e1bfacf1ccbded174e00d4150a/sabot/kernel/src/main/java/com/dremio/exec/record/FragmentWritableBatch.java#L110)
Is it possible that merged changes break Netty's assumptions in
[unwrapBuffer](https://github.com/apache/arrow-java/blob/cb24576e895c0bf8e1d062e2fc82f2b53bfa2eb8/memory/memory-netty-buffer-patch/src/main/java/io/netty/buffer/NettyArrowBuf.java#L624)
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