Hi, I'm Haeyoon, currently exploring through Nemo for GSoC. I have found a bug in Nemo and reported the issue in JIRA(NEMO-366 <https://issues.apache.org/jira/browse/NEMO-366>), also the PR.
I have temporarily resolved the issue, replacing and deleting DirectByteArrayOutputStream's API to ByteArrayOutputStream's. Actually, I guess the whole class may be deleted, but I found that this class appears a lot in Nemo so I didn't attempt to. Please look over the PR and leave comments if there is a better way. Additionally, I guess it would be better if the byte buffer can be implemented off-heap to reduce GC pressures. It is related with one of the GSoC 2019 topic, so maybe we can extend the topic to this part. Best wishes, Haeyoon
