Conference Proceeding

Repairing and Optimizing Hadoop hashCode Implementations



Attila Kocsis Z, Neumann G, Swan J, Epitropakis M, Brownlee A, Haraldsson S & Bowles E (2014) Repairing and Optimizing Hadoop hashCode Implementations. In: Le GC & Yoo S (eds.) Search-Based Software Engineering: 6th International Symposium, SSBSE 2014, Fortaleza, Brazil, August 26-29, 2014. Proceedings. 6th International Symposium, SSBSE 2014, Fortaleza, Brazil, 26.08.2014-29.08.2014. Berlin Heidelberg: Springer, pp. 259-264.;

We describe how contract violations in JavaTM hashCode methods can be repaired using novel combination of semantics-preserving and generative methods, the latter being achieved via Automatic Improvement Programming. The method described is universally applicable. When applied to the Hadoop platform, it was established that it produces hashCode functions that are at least as good as the original, broken method as well as those produced by a widely-used alternative method from the ‘Apache Commons' library.

Publication date31/12/2014
Publication date online31/08/2014
Related URLs
Publisher URL…3-319-09940-8_21
Place of publicationBerlin Heidelberg
Conference6th International Symposium, SSBSE 2014
Conference locationFortaleza, Brazil

People (2)


Dr Sandy Brownlee

Dr Sandy Brownlee

Senior Lecturer in Computing Science, Computing Science and Mathematics - Division

Dr Saemundur Haraldsson

Dr Saemundur Haraldsson

Lecturer, Computing Science