h2oai/h2o-3

#Recent Changes

##H2O-Dev

Serre (0.2.1.1) - 3/18/15

####New Features The following features have been added since the last release:

#####Algorithms

Naive Bayes in H2O-dev (PUBDEV-158)
GLM model output, details from R (HEXDEV-94)
Run GLM Regression from Flow (including LBFGS) (HEXDEV-110)
PCA (PUBDEV-157)
Port Random Forest to h2o-dev (PUBDEV-455)
Enable DRF model output (github)
Add DRF to Flow (Model Output) (PUBDEV-533)
Grid for GBM (github)
Run Deep Learning Regression from Flow (HEXDEV-109)

#####Python

Add Python wrapper for DRF (PUBDEV-534)

#####R

Add R wrapper for DRF (PUBDEV-530)

#####System

Include uploadFile (PUBDEV-299) (github)
Added -flow_dir to hadoop driver (github)

#####Web UI

Add Flow packs (HEXDEV-190) (PUBDEV-247)
Integrate H2O Help inside Help panel (PUBDEV-108) (github)
Add quick toggle button to show/hide the sidebar (github)
Add New, Open toolbar buttons (github)
Auto-refresh data preview when parse setup input parameters are changed (PUBDEV-532) -Flow: Add playbar with Run, Continue, Pause, Progress controls (HEXDEV-192)
You can now stop/cancel a running flow

####Enhancements

The following changes are improvements to existing features (which includes changed default values):

#####Algorithms

Display GLM coefficients only if available (PUBDEV-466)
Add random chance line to RoC chart (HEXDEV-168)
Allow validation dataset for AutoEncoder (PUDEV-581)
Speed up DLSpiral test. Ignore Neurons test (MatVec) (github)
Use getRNG for Dropout (github)
PUBDEV-598: Add tests for determinism of RNGs (github)
PUBDEV-598: Implement Chi-Square test for RNGs (github)
PUBDEV-580: Add log loss to binomial and multinomial model metric (github)
Add DL model output toString() (github)
Add LogLoss to MultiNomial ModelMetrics (PUBDEV-580)
Port MissingValueInserter EndPoint to h2o-dev (PUBDEV-465)
Print number of categorical levels once we hit >1000 input neurons. (github)
Updated the loss behavior for GBM. When loss is set to AUTO, if the response is an integer with 2 levels, then bernoullli (rather than gaussian) behavior is chosen. As a result, the do_classification flag is no longer necessary in Flow, since the loss completely specifies the desired behavior, and R users no longer to use as.factor() in their response to get the desired bernoulli behavior. The score_each_iteration flag has been removed as well. (github)
Fully remove _convert_to_enum in all algos (github)
Add DL POJO scoring (PUBDEV-585)

#####API

Display point layer for tree vs mse plots in GBM output (PUBDEV-504)
Rename API inputs/outputs (github)
Rename Inf to Infinity (github)

#####Python

added H2OFrame.setNames(), H2OFrame.cbind(), H2OVec.cbind(), h2o.cbind(), and pyunit_cbind.py (github)
Make H2OVec.levels() return the levels (github)
H2OFrame.dim(), H2OFrame.append(), H2OVec.setName(), H2OVec.isna() additions. demo pyunit addition (github)

#####R

PUBDEV-578, PUBDEV-541, PUBDEV-566. -R client now sends the data frame column names and data types to ParseSetup. -R client can get column names from a parsed frame or a list. -Respects client request for column data types (github)

#####System

Customize H2O web UI port (PUBDEV-483)
Make parse setup interactive (PUBDEV-532)
Added --verbose (github)
Adds some H2OParseExceptions. Removes all H2O.fail in parse (no parse issues should cause a fail)(github)
Allows parse to specify check_headers=HAS_HEADERS, but not provide column names (github)
Port MissingValueInserter EndPoint to h2o-dev (PUBDEV-465)

#####Web UI

Add 'Clear cell' and 'Run all cells' toolbar buttons (github)
Add 'Clear cell' and 'Clear all cells' commands (PUBDEV-493) (github)
'Run' button selects next cell after running
ModelMetrics by model category: Clustering (PUBDEV-416)
ModelMetrics by model category: Regression (PUBDEV-415)
ModelMetrics by model category: Multinomial (PUBDEV-414)
ModelMetrics by model category: Binomial (PUBDEV-413)
Add ability to select and delete multiple models (github)
Add ability to select and delete multiple frames (github)
Flows now stop running when an error occurs
Print full number of mismatches during POJO comparison check. (github)
Make Grid multi-node safe (github)
Beautify the vertical axis labels for Flow charts/visualization (more) (PUBDEV-329)

####Bug Fixes The following changes are to resolve incorrect software behavior:

#####Algorithms

GBM only populates either MSE_train or MSE_valid but displays both (PUBDEV-350)
GBM: train error increases after hitting zero on prostate dataset (PUBDEV-513)
GBM : Variable importance displays 0's for response param => should not display response in table at all (PUBDEV-430)
Inconsistency in GBM results:Gives different results even when run with the same set of params (HEXDEV-194)
GLM : R/Flow ==> Build GLM Model hangs at 4% (PUBDEV-456)
Import file from R hangs at 75% for 15M Rows/2.2 K Columns (HEXDEV-179)
Flow: GLM - 'model.output.coefficients_magnitude.name' not found, so can't view model (PUBDEV-466)
GBM predict fails without response column (PUBDEV-478)
GBM: When validation set is provided, gbm should report both mse_valid and mse_train (PUBDEV-499)
PCA Assertion Error during Model Metrics (PUBDEV-548) (github)
KMeans: Size of clusters in Model Output is different from the labels generated on the training set (PUBDEV-542) (github)
Inconsistency in GBM results:Gives different results even when run with the same set of params (HEXDEV-194)
divide by zero in modelmetrics for deep learning (PUBDEV-568)
AUC reported on training data is 0, but should be 1 (HEXDEV-223) (github)
GBM: reports 0th tree mse value for the validation set, different than the train set ,When only train sets is provided (PUDEV-561)
PUBDEV-580: Fix some numerical edge cases (github)
Fix two missing float -> double conversion changes in tree scoring. (github)
Problems during Train/Test adaptation between Enum/Numeric (HEXDEV-229)
DRF/GBM balance_classes=True throws unimplemented exception (HEXDEV-226)
Flow: HIDDEN_DROPOUT_RATIOS for DL does not show default value (PUBDEV-285)
Old GLM Parameters Missing (PUBDEV-431)
GLM: R/Flow ==> Build GLM Model hangs at 4% (PUBDEV-456)
GBM: Initial mse in bernoulli seems to be off (PUBDEV-515)

#####API

SplitFrame on String column produce C0LChunk instead of CStrChunk (PUBDEV-468)
Error in node$h2o$node : $ operator is invalid for atomic vectors (PUBDEV-348)
Response from /ModelBuilders don't conform to standard error json shape when there are errors (HEXDEV-121)

#####Python

fix python syntax error (github)
Fixes handling of None in python for a returned na_string. (github)

#####R

R : Inconsistency - Train set name with and without quotes work but Validation set name with quotes does not work (PUBDEV-491)
h2o.confusionmatrices does not work (PUBDEV-547)
How do i convert an enum column back to integer/double from R? (PUBDEV-546)
Summary in R is faulty (PUBDEV-539)
Custom Functions don't work in apply() in R (PUBDEV-436)
R: as.h2o should preserve R data types (PUBDEV-578)
as.h2o loses track of headers (PUBDEV-541)
NPE in GBM Prediction with Sliced Test Data (HEXDEV-207) (github)
Import file from R hangs at 75% for 15M Rows/2.2 K Columns (HEXDEV-179)
Custom Functions don't work in apply() in R (PUBDEV-436)
got water.DException$DistributedException and then got java.lang.RuntimeException: Categorical renumber task (HEXDEV-195)
h2o.confusionMatrices for multinomial does not work (PUBDEV-577)
R: h2o.confusionMatrix should handle both models and model metric objects (PUBDEV-590)
H2O-R: as.h2o parses column name as one of the row entries (PUBDEV-591)

#####System

Flow: When balance class = F then flow should not show max_after_balance_size = 5 in the parameter listing (PUBDEV-503)
3 jvms, doing ModelMetrics on prostate, class water.KeySnapshot$GlobalUKeySetTask; class java.lang.AssertionError: *** Attempting to block on task (class water.TaskGetKey) with equal or lower priority. Can lead to deadlock! 122 <= 122 (PUBDEV-495)
Not able to start h2o on hadoop (PUBDEV-487)
one row (one col) dataset seems to get assertion error in parse setup request (PUBDEV-96)
Parse : Import file (move.com) => Parse => First row contains column names => column names not selected (HEXDEV-171) (github)
The NY0 parse rule, in summary. Doesn't look like it's counting the 0's as NAs like h2o (PUBDEV-154)
0 / Y / N parsing (PUBDEV-229)
NodePersistentStorage gets wiped out when laptop is restarted. (HEXDEV-167)
Parse : Parsing random crap gives java.lang.ArrayIndexOutOfBoundsException: 13 (PUBDEV-428)
Flow: converting a column to enum while parsing does not work (PUBDEV-566)
Parse: Numbers completely parsed wrong (PUBDEV-574)
NodePersistentStorage gets wiped out when hadoop cluster is restarted (HEXDEV-185)
Parse: Fail gracefully when asked to parse a zip file with different files in it (PUBDEV-540)(github)
Building a model and making a prediction accepts invalid frame types (PUBDEV-83)
Flow : Import file 15M rows 2.2 Cols => Parse => Error fetching job on UI =>Console : ERROR: Job was not successful Exiting with nonzero exit status (HEXDEV-55)
Flow : Build GLM Model => Family tweedy => class hex.glm.LSMSolver$ADMMSolver$NonSPDMatrixException', with msg 'Matrix is not SPD, can't solve without regularization (PUBDEV-211)
Flow : Import File : File doesn't exist on all the hdfs nodes => Fails without valid message (PUBDEV-313)
Check reproducibility on multi-node vs single-node (PUBDEV-557)
Parse: After parsing Chicago crime dataset => Not able to build models or Get frames (PUBDEV-576)

#####Web UI

Flow : Build Model => Parameters => shows meta text for some params (PUBDEV-505)
Flow: K-Means - "None" option should not appear in "Init" parameters (PUBDEV-459)
Flow: PCA - "None" option appears twice in "Transform" list (HEXDEV-186)
GBM Model : Params in flow show two times (PUBDEV-440)
Flow multinomial confusion matrix visualization (HEXDEV-204)
Flow: It would be good if flow can report the actual distribution, instead of just reporting "Auto" in the model parameter listing (PUBDEV-509)
Unimplemented algos should be taken out from drop down of build model (PUBDEV-511)
[MapR] unable to give hdfs file name from Flow (PUBDEV-409)

###Selberg (0.2.0.1) - 3/6/15 ####New Features

#####Web UI

Flow: Delete functionality to be available for import files, jobs, models, frames (PUBDEV-241)
Implement "Download Flow" (PUBDEV-407)
Flow: Implement "Run All Cells" (PUBDEV-110)

#####API

Create python package (PUBDEV-181)
as.h2o in Python (HEXDEV-72)

#####System

Add a README.txt to the hadoop zip files (github)
Build a cdh5.2 version of h2o (github)

####Enhancements

#####Web UI

Flow: Job view should have info on start and end time (PUBDEV-267)
Flow: Implement 'File > Open' (PUBDEV-408)
Display IP address in ADMIN -> Cluster Status (HEXDEV-159)
Flow: Display alternate UI for splitFrames() (PUBDEV-399)

#####Algorithms

Added K-Means scoring (github)
Flow: Implement model output for Deep Learning (PUBDEV-118)
Flow: Implement model output for GLM (PUBDEV-120)
Deep Learning model output (HEXDEV-89, Flow),(HEXDEV-88, Python),(HEXDEV-87, R)
Run GLM Binomial from Flow (including LBFGS) (HEXDEV-90)
Flow: Display confusion matrices for multinomial models (PUBDEV-397)
During PCA, missing values in training data will be replaced with column mean (github)
Update parameters for best model scan (github)
Change Quantiles to match h2o-1; both Quantiles and Rollups now have the same default percentiles (github)
Massive cleanup and removal of old PCA, replacing with quadratically regularized PCA based on alternating minimization algorithm in GLRM (github)
Add model run time to DL Model Output (github)
Don't gather Neurons/Weights/Biases statistics (github)
Only store best model if override_with_best_model is enabled (github)
beta_eps added, passing tests changed (github)
For GLM, default values for max_iters parameter were changed from 1000 to 50.
For quantiles, probabilities are displayed.
Run Deep Learning Multinomial from Flow (HEXDEV-108)

#####API

Expose DL weights/biases to clients via REST call (PUBDEV-344)
Flow: Implement notification bar/API (PUBDEV-359)
Variable importance data in REST output for GLM (PUBDEV-359)
Add extra DL parameters to R API (average_activation, sparsity_beta, max_categorical_features, reproducible) (github)
Update GLRM API model output (github)
h2o.anomaly missing in R (PUBDEV-434)
No method to get enum levels (PUBDEV-432)

#####System

Improve memory footprint with latest version of h2o-dev (github)
For now, let model.delete() of DL delete its best models too. This allows R code to not leak when only calling h2o.rm() on the main model. (github)
Bind both TCP and UDP ports before clustering (github)
Round summary row#. Helps with pctiles for very small row counts. Add a test to check for getting close to the 50% percentile on small rows. (github)
Increase Max Value size in DKV to 256MB (github)
Flow: make parseRaw() do both import and parse in sequence (HEXDEV-184)
Remove notion of individual job/job tracking from Flow (PUBDEV-449)
Capability to name prediction results Frame in flow (PUBDEV-233)

####Bug Fixes

#####Algorithms

GLM binomial prediction failing (PUBDEV-403)
DL: Predict with auto encoder enabled gives Error processing error (PUBDEV-433)
balance_classes in Deep Learning intermittent poor result (PUBDEV-437)
Flow: Building GLM model fails (PUBDEV-186)
summary returning incorrect 0.5 quantile for 5 row dataset (PUBDEV-95)
GBM missing variable importance and balance-classes (PUBDEV-309)
H2O Dev GBM first tree differs from H2O 1 (PUBDEV-421)
get glm model from flow fails to find coefficient name field (PUBDEV-394)
GBM/GLM build model fails on Hadoop after building 100% => Failed to find schema for version: 3 and type: GBMModel (PUBDEV-378)
Parsing KDD wrong (PUBDEV-393)
GLM AIOOBE (PUBDEV-199)
Flow : Build GLM Model with family poisson => java.lang.ArrayIndexOutOfBoundsException: 1 at hex.glm.GLM$GLMLambdaTask.needLineSearch(GLM.java:359) (PUBDEV-210)
Flow : GLM Model Error => Enum conversion only works on small integers (PUBDEV-365)
GLM binary response, do_classfication=FALSE, family=binomial, prediction error (PUBDEV-339)
Epsilon missing from GLM parameters (PUBDEV-354)
GLM NPE (PUBDEV-395)
Flow: GLM bug (or incorrect output) (PUBDEV-252)
GLM binomial prediction failing (PUBDEV-403)
GLM binomial on benign.csv gets assertion error in predict (PUBDEV-132)
current summary default_pctiles doesn't have 0.001 and 0.999 like h2o1 (PUBDEV-94)
Flow: Build GBM/DL Model: java.lang.IllegalArgumentException: Enum conversion only works on integer columns (PUBDEV-213) (github)
ModelMetrics on cup98VAL_z dataset has response with many nulls (PUBDEV-214)
GBM : Predict model category output/inspect parameters shows as Regression when model is built with do classification enabled (PUBDEV-441)
Fix double-precision DRF bugs (github)

#####System

Null columnTypes for /smalldata/arcene/arcene_train.data (PUBDEV-406) (github)
Flow: Waiting for -1 responses after starting h2o on hadoop cluster of 5 nodes (PUBDEV-419)
Parse: airlines_all.csv => Airtime type shows as ENUM instead of Integer (PUBDEV-426) (github)
Flow: Typo - "Time" option displays twice in column header type menu in Parse (PUBDEV-446)
Duplicate validation messages in k-means output (PUBDEV-305) (github)
Fixes Parse so that it returns to supplying generic column names when no column names exist (github)
Flow: Import File: File doesn't exist on all the hdfs nodes => Fails without valid message (PUBDEV-313)
Flow: Parse => 1m.svm hangs at 42% (HEXDEV-174)
Prediction NFE (PUBDEV-308)
NPE doing Frame to key before it's fully parsed (PUBDEV-79)
h2o_master_DEV_gradle_build_J8 #351 hangs for past 17 hrs (PUBDEV-239)
Sparkling water - container exited due to unavailable port (PUBDEV-357)

#####API

Flow: Splitframe => java.lang.ArrayIndexOutOfBoundsException (PUBDEV-410) (github)
Incorrect dest.type, description in /CreateFrame jobs (PUBDEV-404)
space in windows filename on python (PUBDEV-444)
Python end-to-end data science example 1 runs correctly (PUBDEV-182)
3/NodePersistentStorage.json/foo/id should throw 404 instead of 500 for 'not-found' (HEXDEV-163)
POST /3/NodePersistentStorage.json should handle Content-Type:multipart/form-data (HEXDEV-165)
by class water.KeySnapshot$GlobalUKeySetTask; class java.lang.AssertionError: *** Attempting to block on task (class water.TaskGetKey) with equal or lower priority. Can lead to deadlock! 122 <= 122 (PUBDEV-92)
Sparkling water : val train:DataFrame = prostateRDD => Fails with ArrayIndexOutOfBoundsException (PUBDEV-392)
Flow : getModels produces error: Error calling GET /3/Models.json (PUBDEV-254)
Flow : Splitframe => java.lang.ArrayIndexOutOfBoundsException (PUBDEV-410)
ddply 'Could not find the operator' (HEXDEV-162) (github)
h2o.table AIOOBE during NewChunk creation (HEXDEV-161) (github)
Fix warning in h2o.ddply when supplying multiple grouping columns (github)

###0.1.26.1051 - 2/13/15

####New Features

Flow: Display alternate UI for splitFrames() (PUBDEV-399)

####Enhancements

#####System

Embedded H2O config can now provide flat file (needed for Hadoop) (github)
Don't logging GET of individual jobs to avoid filling up the logs (github)

#####Algorithms

Increase GBM/DRF factor binning back to historical levels. Had been capped accidentally at nbins (typically 20), was intended to support a much higher cap. (github)
Tweaked rho heuristic in glm (github)
Enable variable importances for autoencoders (github)
Removed group_split option from GBM
Flow: display varimp for GBM output (PUBDEV-398)
variable importance for GBM (github)
GLM in H2O-Dev may provide slightly different coefficient values when applying an L1 penalty in comparison with H2O1.

####Bug Fixes

#####Algorithms

Fixed bug in GLM exception handling causing GLM jobs to hang (github)
Fixed a bug in kmeans input parameter schema where init was always being set to Furthest (github)
Fixed mean computation in GLM (github)
Fixed kmeans.R (github)
Flow: Building GBM model fails with Error executing javascript (PUBDEV-396)

#####System

DataFrame propagates absolute path to parser (github)
Fix flow shutdown bug (github)

###0.1.26.1032 - 2/6/15

####New Features

#####General Improvements

better model output
support for Python client
support for Maven
support for Sparkling Water
support for REST API schema
support for Hadoop CDH5 (github)

#####UI

Display summary visualizations by default in column summary output cells (PUBDEV-337)
Display AUC curve by default in binomial prediction output cells (PUBDEV-338)
Flow: Implement About H2O/Flow with version information (PUBDEV-111)
Add UI for CreateFrame (PUBDEV-218)
Flow: Add ability to cancel running jobs (PUBDEV-373)
Flow: warn when user navigates away while having unsaved content (PUBDEV-322)

#####Algorithms

Implement splitFrame() in Flow (PUBDEV-356)
Variable importance graph in Flow for GLM (PUBDEV-360)
Flow: Implement model building form init and validation (PUBDEV-102)
Added a shuffle-and-split-frame function; Use it to build a saner model on time-series data (github)
Added binomial model metrics (github)
Run KMeans from R (HEXDEV-105)
Be able to create a new GLM model from an existing one with updated coefficients (HEXDEV-48)
Run KMeans from Python (HEXDEV-106)
Run Deep Learning Binomial from Flow (HEXDEV-83)
Run KMeans from Flow (HEXDEV-104)
Run Deep Learning from Python (HEXDEV-85)
Run Deep Learning from R (HEXDEV-84)
Run Deep Learning Multinomial from Flow (HEXDEV-108)
Run Deep Learning Regression from Flow (HEXDEV-109)

#####API

Flow: added REST API documentation to the web ui (PUBDEV-60)
Flow: Implement visualization API (PUBDEV-114)

#####System

Dataset inspection from Flow (HEXDEV-66)
Basic data munging (Rapids) from R (HEXDEV-70)
Implement stack operator/stacking in Lightning (HEXDEV-128)

####Enhancements

#####UI

Added better message when h2o.init() not yet called (No active connection to an H2O cluster. Try calling "h2o.init()") (github)

#####Algorithms

Updated column-based gradient task to use sparse interface (github)
Updated LBFGS (added progress monitor interface, updated some default params), added progress and job support to GLM lbfgs (github)
Added pretty print (github)
Added AutoEncoder to R model categories (github)
Added Coefficients table to GLM model (github)
Updated glm lbfgs to allow for efficient lambda-search (l2 penalty only) (github)
Removed splitframe shuffle parameter (github)
Simplified model builders and added deeplearning model builder (github)
Add DL model outputs to Flow (PUBDEV-372)
Flow: Deep Learning: Expert Mode (PUBDEV-284)
Flow: Display multinomial and regression DL model outputs (PUBDEV-383)
Display varimp details for DL models (PUBDEV-381)
Make binomial response "0" and "1" by default (github)
Add Coefficients table to GLM model (github)
Removed splitframe shuffle parameter (github)
Update R GBM demos to reflect new input parameter names (github)
Rename GLM variable importance to normalized coefficient magnitudes (github)

#####API

Changed key to destination_key (github)
Cleaned up REST API schema interface (github)
Changed method name, cleaned setup, added a pyunit runner (github)

#####System

Allow changing column types during parse-setup (PUBDEV-376)
Display %NAs in model builder column lists (PUBDEV-375)
Figure out how to add H2O to PyPl (PUBDEV-178)

####Bug Fixes

#####UI

Flow: Parse => 1m.svm hangs at 42% (PUBDEV-345)
cup98 Dataset has columns that prevent validation/prediction (PUBDEV-349)
Flow: predict step failed to function (PUBDEV-217)
Flow: Arrays of numbers (ex. hidden in deeplearning)require brackets (PUBDEV-303)
Flow v.0.1.26.1030: StackTrace was broken (PUBDEV-371)
Flow: Import files -> Search -> Parse these files -> null pointer exception (PUBDEV-170)
Flow: "getJobs" not working (PUBDEV-320)
Thresholds x Metrics and Max Criteria x Metrics tables were flipped in flow (HEXDEV-155)
Flow v.0.1.26.1030: StackTrace is broken (PUBDEV-348)
flow: getJobs always shows "Your H2O cloud has no jobs" (PUBDEV-243)
Flow: First and last characters deleted from ignored columns (PUBDEV-300)
Sparkling water => Flow => Menu buttons for cell do not show up (PUBDEV-294)

#####Algorithms

Flow: Build K Means model with default K value gives error "Required field k not specified" (PUBDEV-167)
Slicing out a specific data point is broken (PUBDEV-280)
Flow: SplitFrame and grep in algorithms for flow and loops back onto itself (PUBDEV-272)
Fixed the predict method (github)
Refactor ModelMetrics into a different class for Binomial (github)
/Predictions.json did not cache predictions (HEXDEV-119)
Flow, DL: Error after changing hidden layer size (PUBDEV-323)
Error in node$h2o#node: $ operator is invalid for atomic vectors (PUBDEV-348)
Fixed K-means predict (PUBDEV-321)
Flow: DL build mode fails => as it's missing adding quotes to parameter (PUBDEV-301)
Flow: Build K means model with training/validation frames => unknown error (PUBDEV-185)
Flow: Build quantile mode=> Click goes in loop (PUBDEV-188)

#####API

Sparkling Water/Flow: Failed to find version for schema (PUBDEV-367)
Cloud.json returns odd node name (PUBDEV-259)

#####System

guesser needs to send types to parse (PUBDEV-279)
Got h2o.clusterStatus function working in R. (github)
Parse: Using R => java.lang.NullPointerException (PUBDEV-380)
Flow: Jobs => click on destination key => unimplemented: Unexpected val class for Inspect: class water.fvec.DataFrame (PUBDEV-363)
Column assignment in R exposes NullPointerException in Rollup (PUBDEV-155)
import from hdfs doesn't add files (PUBDEV-260)
AssertionError: ERROR: got tcp resend with existing in-progress task (PUBDEV-219)
HDFS parse fails when H2O launched on Spark CDH5 (PUBDEV-138)
Flow: Parse failure => java.lang.ArrayIndexOutOfBoundsException (PUBDEV-296)
"predict" step is not working in flow (PUBDEV-202)
Flow: Frame finishes parsing but comes up as null in flow (PUBDEV-270)
scala >flightsToORD.first() fails with "not serializable result" (PUBDEV-304)
DL throws NPE for bad column names (PUBDEV-15)
Flow: Build model: Not able to build KMeans/Deep Learning model (PUBDEV-297)
Flow: Col summary for NA/Y cols breaks (PUBDEV-325)
Sparkling Water : util.SparkUncaughtExceptionHandler: Uncaught exception in thread Thread NanoHTTPD Session,9,main (PUBDEV-346)
toDataFrame doesn't support sequence format schema (array, vectorUDT) (PUBDEV-457)

###0.1.20.1019 - 1/19/15

####New Features

#####UI

Added various documentation links to the build page (github)

#####Algorithms

Ported matrix multiply over and connected it to rapids (github)

####Enhancements

#####UI

Allow user to specify (the log of) the number of rows per chunk for a new constant chunk; use this new function in CreateFrame (github)
Make CreateFrame non-blocking, now displays progress bar in Flow (github)
Add row and column count to H2OFrame show method (github)
Admin watermeter page (PUBDEV-234)
Admin stack trace (PUBDEV-228)
Admin profile (PUBDEV-227)
Flow: Add download logs in UI (PUBDEV-204)
Need shutdown, minimally like h2o (PUBDEV-74)

#####API

Changed 2 to 3 for JSON requests (github)
Rename some more fields per consistency (max_iters changed to max_iterations, _iters to _iterations, _ncats to _categorical_column_count, _centersraw to centers_raw, _avgwithinss to avg_within_ss, _withinmse to within_mse) (github)
Changed K-Means output parameters (withinmse to within_mse, avgss to avg_ss, avgbetweenss to avg_between_ss) (github)
Remove default field values from DeepLearning parameters schema, since they come from the backing class (github)
Add @API help annotation strings to JSON model output (PUBDEV-216)

#####Algorithms

Minor fix in rapids matrix multiplicaton (github)
Updated sparse chunk to cut off binary search for prefix/suffix zeros (github)
Updated L_BFGS for GLM - warm-start solutions during lambda search, correctly pass current lambda value, added column-based gradient task (github)
Fix model parameters' default values in the metadata (github)
Set default value of k = number of clusters to 1 for K-Means (PUBDEV-251)

#####System

Reject any training data with non-numeric values from KMeans model building (github)

####Bug Fixes

#####API

Fixed isSparse call for constant chunks (github)
Fixed sparse interface of constant chunks (no nonzero if const 1= 0) (github)

#####System

Typeahead for folder contents apparently requires trailing "/" (github)
Fix build and instructions for R install.packages() style of installation; Note we only support source installs now (github)
Fixed R test runner h2o package install issue that caused it to fail to install on dev builds (github)

###0.1.18.1013 - 1/14/15

####New Features

#####UI

Admin timeline (PUBDEV-226)
Admin cluster status (PUBDEV-225)
Markdown cells should auto run when loading a saved Flow notebook (PUBDEV-87)
Complete About page to include info about the H2O version (PUBDEV-223)

####Enhancements

#####Algorithms

Flow: Implement model output for GBM (PUBDEV-119)

###0.1.20.1016 - 12/28/14

Added ip_port field in node json output for Cloud query (github)