Masatake Iwasaki
Member at The Apache Software Foundation
Japan
Summary
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RockstarMasatake Iwasaki is a seasoned back-end engineer with 14 years of experience focused on large-scale distributed systems and big data infrastructure. He is an active Apache contributor and committer across Hadoop, Bigtop, HTrace and EDC, where he has fixed tricky intermittent test failures, improved IPC/HDFS robustness, and tuned network behaviors like TCP_NODELAY for DataTransferProtocol. At Apache Bigtop he resolved complex build and dependency issues to keep Hadoop ecosystem components (Hive, HBase, Phoenix, Sqoop2, Oozie) compatible and production-ready. His work on Eclipse EDC emphasizes reliability and test automation, including refactoring event handling and adding S3 integration tests to stabilize data transfers. Based in Japan and employed at NTT Data, he blends long-term enterprise delivery with deep open-source maintenance, a combination that surfaces in pragmatic fixes that prevent recurring runtime and CI problems.
13 years of coding experience
Github Skills (30)
hbase10
debug10
back-end-development10
testing10
big-data10
hdfs10
hadoop10
java10
dataplane10
javas10
hive10
phoenix-liveview10
sqoop10
phoenix-framework10
apache-phoenix10
Programming languages (7)
Github contributions (5)
apache/hadoop
Jan 2016 - Aug 2022
Apache Hadoop
Role in this project:
Back-end Developer
Back-end DeveloperContributions:97 reviews, 341 commits, 181 PRs in 6 years 8 months
Contributions summary:The user, iwasakims, contributed to the Apache Hadoop project by fixing several bugs and improving the codebase. Their work included addressing intermittent failures in test cases related to IPC and HDFS. They also implemented enhancements, such as setting TCP_NODELAY on sockets for DataTransferProtocol in DFSClient and DFSOutputStream. Furthermore, the user fixed a mismatch in log levels in the BlockManager.
apachebig-datasparkhadoopjava
apache/bigtop
Jan 2020 - Jan 2023
Bigtop is an Apache Foundation project for Infrastructure Engineers and Data Scientists looking for comprehensive packaging, testing, and configuration of the leading open source big data components.
Role in this project:Back-end Developer
Back-end DeveloperContributions:401 reviews, 138 commits, 425 PRs in 3 years
Contributions summary:Masatake primarily contributed to fixing service and build configuration issues for Sqoop2 and Oozie within the Apache Bigtop project. These changes involved modifying service configuration files, fixing build failures related to dependencies, and bumping versions of Hadoop, HBase, Hive, and Phoenix. The user also addressed various build-related issues, including dependency resolution for different software components, ensuring the compatibility and proper functionality of big data tools.
javaapachebig-databigtop
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