[ https://issues.apache.org/jira/browse/OAK-6317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Davide Giannella updated OAK-6317: ---------------------------------- Fix Version/s: 1.8.0 > LMSEstimator update amount depending on cost amount > --------------------------------------------------- > > Key: OAK-6317 > URL: https://issues.apache.org/jira/browse/OAK-6317 > Project: Jackrabbit Oak > Issue Type: Bug > Components: solr > Affects Versions: 1.6.1, 1.7.1, 1.4.16, 1.2.26 > Reporter: Tommaso Teofili > Assignee: Tommaso Teofili > Fix For: 1.7.3, 1.6.2, 1.2.27, 1.4.17, 1.8.0 > > > {{LMSEstimator}} update rule implementation wrongly updates the weights > taking the LMS cost value into account, this means that if the error is huge > (and the cost quadratically grows with it) the weight could get an update > value almost proportional to the LMS value (smoothed by learning rate alpha). > The correct update rule should be used which only uses the residual. > The side effect of this bug is that: > * cost may vary a lot > * weights could not converge to a good solution -- This message was sent by Atlassian JIRA (v6.4.14#64029)