yo jhipster:upgrade failed from 4.2 to 4.3

Here is the output:

Welcome to the JHipster Upgrade Sub-Generator This will upgrade your current application codebase to the latest JHipster version Looking for latest generator-jhipster version… New generator-jhipster version found: 4.3.0 Git repository detected Created branch jhipster_upgrade Cleaned up directory Installing JHipster 4.2.0 locally Installed generator-jhipster@4.2.0 Regenerating app with jhipster 4.2.0… Successfully regenerated app with jhipster 4.2.0 Committed with message “Generated with JHipster 4.2.0” Checked out branch “master” Current code recorded as generated with version 4.2.0 Updating generator-jhipster to 4.3.0 . This might take some time… Updated generator-jhipster to version 4.3.0 Checked out branch “jhipster_upgrade” Cleaned up directory Regenerating app with jhipster 4.3.0… Successfully regenerated app with jhipster 4.3.0 Committed with message “Generated with JHipster 4.3.0” Checked out branch “master” Merging changes back to master… Merge done! Installing dependencies, please wait… Error jhipster:upgrade

ERROR! yarnfailed.

The yo jhipster:info gives the following output:

Welcome to the JHipster Information Sub-Generator

JHipster Version(s)

smart-price@0.0.0 /Users/testuser/Demo/SmartPrice
└── (empty)

JHipster configuration, a .yo-rc.json file generated in the root folder

{
  "generator-jhipster": {
    "promptValues": {
      "packageName": "com.company.smartprice"
    },
    "jhipsterVersion": "4.2.0",
    "baseName": "SmartPrice",
    "packageName": "com.company.smartprice",
    "packageFolder": "com/company/smartprice",
    "serverPort": "8080",
    "authenticationType": "session",
    "hibernateCache": "ehcache",
    "clusteredHttpSession": false,
    "websocket": false,
    "databaseType": "sql",
    "devDatabaseType": "h2Disk",
    "prodDatabaseType": "mysql",
    "searchEngine": false,
    "messageBroker": false,
    "serviceDiscoveryType": false,
    "buildTool": "maven",
    "enableSocialSignIn": false,
    "rememberMeKey": "286e201fdd317cb4c624967b490c25997edc8f0b",
    "clientFramework": "angular2",
    "useSass": false,
    "clientPackageManager": "yarn",
    "applicationType": "monolith",
    "testFrameworks": [],
    "jhiPrefix": "jhi",
    "enableTranslation": false
  }
}

Entity configuration(s) entityName.json files generated in the .jhipster directory

ls: no such file or directory: .jhipster/*.json

Browsers and Operating System

java version “1.8.0_121” Java™ SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot™ 64-Bit Server VM (build 25.121-b13, mixed mode)

git version 2.11.0 (Apple Git-81)

node: v7.9.0

npm: 4.2.0

bower: 1.8.0

gulp: [13:30:37] CLI version 1.2.2

yeoman: 1.8.5

yarn: 0.23.2

[poolebu]

Based on comments on the #5637 closed ticket, I did yarn upgrade and when the error appeared, I committed the yarn.lock and package.json, then ran jhipster upgrade again based on @jmlw solution. After that it worked perfectly, thank you! and thank you for this amazing framework

[jdubois]

Closed by #5883