Sub-task

• [HIVEMALL-135] - `-iter` option of General classifier/regressor should be documented
• [HIVEMALL-189] - Create a list of all functions
• [HIVEMALL-217] - [DOC] Resolve missing links for documentation

Bug

• [HIVEMALL-117] - Add hivemall in SparkPackages
• [HIVEMALL-190] - [BUG] Fix bug in tree_predict_v1
• [HIVEMALL-208] - tokenize_ja failed to analyze certain Japanese strings
• [HIVEMALL-210] - Bug in LDA/PLSA prediction logic
• [HIVEMALL-211] - [BUGFIX] Fixed Optimizer for regularization updates
• [HIVEMALL-216] - Unable to build Docker image
• [HIVEMALL-218] - Fixed train_lda NPE where input row is null
• [HIVEMALL-219] - NullPointerException in pLSA model

New Feature

• [HIVEMALL-145] - Merge brickhouse functions

Improvement

• [HIVEMALL-24] - Fix the prediction logic of Field-aware Factorization Machines more scalable
• [HIVEMALL-46] - Make it more simpler to upgrade Spark versions
• [HIVEMALL-172] - Change tree_predict 3rd argument to accept string options
• [HIVEMALL-179] - Support Spark 2.3
• [HIVEMALL-180] - Drop the Spark-2.0 support
• [HIVEMALL-191] - Add Kryo serialization tests and remove existing workaround lazy instantiation code
• [HIVEMALL-193] - Implement a tool for generating a list of Hivemall UDFs
• [HIVEMALL-201] - Evaluate, fix and document FFM so Hivemall produces comparable accuracy to LIBFFM
• [HIVEMALL-203] - Relocate Jackson package for to_json/from_json
• [HIVEMALL-212] - Fix Classifier/Regressor not to forward zero weighted values
• [HIVEMALL-215] - [DOC] Add step-by-step tutorial on the document
• [HIVEMALL-222] - Introduce Gradient Clipping to avoid exploding gradient to General Classifier/Regressor
• [HIVEMALL-223] - Add `-kv_map` and `-vk_map` option to to_ordered_list UDAF

Wish

• [HIVEMALL-163] - Add IS_INFINITE, IS_FINITE, IS_NAN functions
• [HIVEMALL-196] - Support BM25 scoring in addition to TF-IDF

Task

• [HIVEMALL-97] - Update logos to use Podling press kit
• [HIVEMALL-152] - [Umbrella] Release Hivemall v0.5.2
• [HIVEMALL-174] - Update RandomForest document to reflect changes in usages
• [HIVEMALL-197] - Update Apache incubator logo
• [HIVEMALL-207] - Remove resources/ddl/*.td.hql files
• [HIVEMALL-227] - Replace md5 checksum and replace SHA1 with SHA512