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tutorial:dev:creating_a_development_environment [2019/07/18 08:07]
kopro [Common error messages] 		tutorial:dev:creating_a_development_environment [2024/01/09 08:25] (current)
koulaj
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 ====== Creating a development environment ====== ====== Creating a development environment ======
  
-This text is intended as a tutorial for CzechIdM developers with the goal to set up IDE, build CzechIdM in it and run the system. If you prefer quick glance at the code or need to start quickly, you can use [[tutorial:dev:quick_start_with_devstack|]]. +This text is intended as a tutorial for CzechIdM developers with the goal to set up IDE, build CzechIdM in it and run the system. If you prefer quick glance at the code or need to start quickly, you can use [[.:quick_start_with_devstack|]].
  
 ====== 1. Install Java and Maven ====== ====== 1. Install Java and Maven ======
Line 7: Line 7:
 First install JDK and Maven: First install JDK and Maven:
  
-Download Java 1.8 Oracle JDK (or OpenJDK), minor version **at least 101** (it's necessary due to the certificate of Nexus repository, which uses Let's encrypt and its support was added in version 101). The guide was tested for jdk1.8.0_131.+Download and install Java 11 OpenJDK (Java 21 OpenJDK for CzechIdM 13.1.0+).
  
 Install Maven from your system packages, at least version 3.1 is required. Install Maven from your system packages, at least version 3.1 is required.
 +
 <code bash> <code bash>
 yum install maven yum install maven
 mvn -v mvn -v
 +
 </code> </code>
  
 Note: If you installed Java separately from your system libraries, you should set the correct Java home for Maven in the file ".mavenrc", which you will create in your home directory. You put there the full path to your JDK: Note: If you installed Java separately from your system libraries, you should set the correct Java home for Maven in the file ".mavenrc", which you will create in your home directory. You put there the full path to your JDK:
 <code> <code>
 +
 export JAVA_HOME=/path/to/installed/jdk/ export JAVA_HOME=/path/to/installed/jdk/
 +
 </code> </code>
 +
 This way Maven will always use this JDK. This way Maven will always use this JDK.
  
Line 27: Line 32:
 <code bash> <code bash>
 git clone https://github.com/bcvsolutions/CzechIdMng.git git clone https://github.com/bcvsolutions/CzechIdMng.git
 +
 </code> </code>
  
-Check branch: +Check branch:
  
 <code bash> <code bash>
 git branch git branch
 +
 </code> </code>
  
Line 39: Line 46:
 <code bash> <code bash>
 git checkout -b develop origin/develop git checkout -b develop origin/develop
 +
 </code> </code>
  
Line 45: Line 53:
 <code bash> <code bash>
 git checkout -b personal/YourName/feature_or_bugfix-name_of_your_branch git checkout -b personal/YourName/feature_or_bugfix-name_of_your_branch
 +
 </code> </code>
  
Line 54: Line 63:
  
 Install necessary packages: Install necessary packages:
 +
 <code bash> <code bash>
 yum install postgresql postgresql-server postgresql-init yum install postgresql postgresql-server postgresql-init
 +
 </code> </code>
  
 Fedora 25 packages: Fedora 25 packages:
 +
 <code bash> <code bash>
 dnf install postgresql-server postgresql-contrib dnf install postgresql-server postgresql-contrib
 +
 +</code>
 +
 +Ubuntu 22.04 LTS packages:
 +
 +<code bash>
 +apt install postgresql postgresql-contrib
 +
 </code> </code>
  
 First run of the service: First run of the service:
 +
 <code bash> <code bash>
 systemctl start postgresql.service systemctl start postgresql.service
 +
 </code> </code>
  
-If the following error occurs: "Job for postgresql.service failed. See 'systemctl status postgresql.service' and 'journalctl -xn' for details." +If the following error occurs: "Job for postgresql.service failed. See 'systemctl status postgresql.service' and 'journalctl -xn' for details." Try initializing the PostgreSQL first and start the database again:
-Try initializing the PostgreSQL first and start the database again:+
  
 <code bash> <code bash>
 postgresql-setup --initdb --unit postgresql postgresql-setup --initdb --unit postgresql
 +
 </code> </code>
  
 Set automatic start of the service when starting OS: Set automatic start of the service when starting OS:
 +
 <code bash> <code bash>
 systemctl enable postgresql.service systemctl enable postgresql.service
 +
 </code> </code>
  
 Set the configuration file for the database to accept login and password (change METHOD from ident to md5) Set the configuration file for the database to accept login and password (change METHOD from ident to md5)
 +
 <code> <code>
 vim /var/lib/pgsql/data/pg_hba.conf vim /var/lib/pgsql/data/pg_hba.conf
 +
 +in Ubuntu it is:
 +vim /etc/postgresql/14/main/pg_hba.conf
 +
 +in Windows it is:
 +<Postgress Install Dir>/Data/pg_hba.conf
  
 # TYPE  DATABASE        USER            ADDRESS                 METHOD # TYPE  DATABASE        USER            ADDRESS                 METHOD
Line 92: Line 123:
 # IPv6 local connections: # IPv6 local connections:
 host         all                  all                ::1/128                     md5 host         all                  all                ::1/128                     md5
 +
 </code> </code>
  
 Restart the service to load the changes: Restart the service to load the changes:
 +
 <code> <code>
 systemctl restart postgresql.service systemctl restart postgresql.service
 +
 </code> </code>
  
-Create the database: +Create the database with name: 
-(Make sure you have installed and allowed en_US locale in your OS)+ 
 +  * Version 10 - bcv\_idm\_10 
 +  * Below version 10 - bcv\_idm\_storage 
 +  * (Make sure you have installed and allowed en_US locale in your OS)
  
 <code> <code>
 su postgres -c psql postgres su postgres -c psql postgres
 CREATE USER idmadmin PASSWORD 'idmadmin'; CREATE USER idmadmin PASSWORD 'idmadmin';
-CREATE DATABASE "bcv_idm_storage" WITH OWNER idmadmin ENCODING 'UTF8' LC_COLLATE = 'en_US.UTF-8' LC_CTYPE = 'en_US.UTF-8' template template0;+CREATE DATABASE "bcv_idm_10" WITH OWNER idmadmin ENCODING 'UTF8' LC_COLLATE = 'en_US.UTF-8' LC_CTYPE = 'en_US.UTF-8' template template0; 
 </code> </code>
  
Line 112: Line 150:
 The tutorial is different for each IDE. Select one and continue with a certain tutorial below: The tutorial is different for each IDE. Select one and continue with a certain tutorial below:
  
-  * [[devel:documentation:quickstart:dev:ide:eclipse|Eclipse]] +  * [[:devel:documentation:quickstart:dev:ide:eclipse|]] 
-  * [[devel:dev:quickstart:ide:idea|IDEA]]+  * [[:devel:documentation:quickstart:dev:ide:idea|]]
  
 In the IDE start the Tomcat server with CzechIdM deployed. In the IDE start the Tomcat server with CzechIdM deployed.
Line 119: Line 157:
 In browser access [[http://localhost:8080/idm-backend/api/v1/status|http://localhost:8080/idm-backend/api/v1/status]] to check whether the backend is running. Following text should be displayed: In browser access [[http://localhost:8080/idm-backend/api/v1/status|http://localhost:8080/idm-backend/api/v1/status]] to check whether the backend is running. Following text should be displayed:
  
-> CzechIdM API is running +> CzechIdM API is running  > \\ > If you can see this message, API is running
-> +
-> If you can see this message, API is running +
  
 ====== 5. Frontend development environment ====== ====== 5. Frontend development environment ======
  
-<note important>**BEWARE!!!** This tutorial may be obsolete. Please use this [[https://github.com/bcvsolutions/CzechIdMng/tree/develop/Realization/frontend|instructions]]</note>+<note important>**BEWARE!!!**  Please use these [[https://github.com/bcvsolutions/CzechIdMng/tree/develop/Realization/frontend|instructions]]</note>
  
-In frontent project folder:+===== Select IDE for frontend environment =====
  
-===== Install Node.js =====+You can use any text editor or JavaScript IDE. We recommend to use ATOM
  
-Node.js version 4.x.x or higher is required (npm version 3.6 or higher is required). Download and install Node.js by your OS. +  * See [[:devel:documentation:quickstart:dev:ide:atom|ATOM tutorial]]
-<note> Be sure to have these versions. When upgrading node by "n" is also "npm" changed usually to lower version than needed. </note>+
  
-For linux (fedora):+====== 6. Run backend and frontend together ======
  
-<code bash> +Assume running backend from the previous steps.
-dnf install nodejs +
-</code>+
  
-Check nodejs version:+In the project root folder:
  
-<code bash> +Start frontend
-node -v +
-</code> +
- +
-Check npm version:+
  
 <code bash> <code bash>
-npm -v+cd CzechIdM/Realization/frontend/czechidm-app 
 +gulp 
 </code> </code>
  
-For update nodejs from 0.x versions:+A new browser window or tab will open with [[https://localhost:3000|https://localhost:3000]] automatically (this could take some time).
  
-  * [[https://nodejs.org/en/download/package-manager/#enterprise-linux-and-fedora]] +The frontend is fully started after you see in following line in log:
-  * [[http://tecadmin.net/upgrade-nodejs-via-npm/#]] +
- +
-Install gulp as global +
- +
-Gulp version 3.9.0 is required.+
  
 <code bash> <code bash>
-npm install gulp@3.9.0 -g +[BS] 1 file changed (app.js)
-</code>+
  
-Check gulp version: 
- 
-<code bash> 
-gulp -v 
 </code> </code>
  
-===== Install the dependencies for application module =====+After the application is running, log in:
  
-First go to directory **czechidm-app**. It is basic application module keep dependencies on other sub-module. This module will start whole application.+  * username: admin 
 +  * password: admin
  
-<code bash> +<note tip>If the app shows error with permission, log out</note> <note tip>To use CzechIdM in more windows or tabs for development purposes go to [[http://localhost:3001/|http://localhost:3001/]] to **BrowserSync**  administration and then go to **SyncOptions**  and disable everything except **CodeSync**</note>
-cd czechidm-app +
-</code>+
  
-Run script modules-link defined in package.json. This script will create directory node_modules in parent directory and create symlink on him in czechidm-app. This prevents the problem with multiple copies of React (https://facebook.github.io/react/warnings/refs-must-have-owner.html). The goal is to have only one node_modules directory (for all ours modules) with React.+Congratulations! Your CzechIdM development environment is ready to use.
  
-<note important>IMPORTANT! Module-link script does not work on Windows. If are you Windows user, then you have to create symlink on node_modules (in parent directory) manually (use command 'mklink /D').</note>+====== Common development errors & tips ======
  
-<code bash> +===== Tomcat server fails to start =====
-npm run modules-link +
-</code>+
  
-<code bash> +If Tomcat server fails to start, try following:
-npm run czechidm-modules-link +
-</code>+
  
-Install basic dependencies for application module (will be common for all submodules ).+  * Increase the timeout for Tomcat server Start (see [[:devel:dev:quickstart:ide:eclipse#install_tomcat|Install Tomcat]]) 
 +  * Check that PostgreSQL server is running.
  
 <code bash> <code bash>
-npm install +systemctl status postgresql.service
-</code>+
  
-Install the dependencies for core module 
- 
-Now we need to install mandatory core module. Go to core directory. You can use symlink in czechidm-modules. 
- 
-<code bash> 
-cd czechidm-modules/czechidm-core 
 </code> </code>
  
-Install NPM dependencies. Most of dependency are installed within czechidm-core module. It is important for prevent problem with multiple copies of React. In this module is React present only in peer dependency. Peer dependency warnings are OK.+  * Check that PostgreSQL database exists and the user can connect: Use the credentials filled in ''idm-app/src/main/resources/application-dev.properties''  and try to connect to the PostgreSQL database written in the datasource URL. E.g. for this setup: 
 +<code>
  
-<code bash> +spring.datasource.url=jdbc:postgresql://localhost:5432/bcv_idm_storage 
-npm install +spring.datasource.username=idmadmin 
-</code>+spring.datasource.password=idmadmin
  
-Go to app module. 
- 
-<code bash> 
-cd ../../ 
 </code> </code>
  
-===== Install the dependencies for other sub modules ===== +use the following command and type the password when asked for it.
- +
-We can install other application modules. We will install optional example module czechidm-example. +
- +
-All application modules are in czechidm-modules directory (in czechidm-app). Go to him and create symlink on example module.+
  
 <code bash> <code bash>
-cd czechidm-modules +psql -h 127.0.0.1 -U idmadmin bcv_idm_storage
-ln -s ../../czechidm-example +
-</code>+
  
-<note important>IMPORTANT! If are you Windows user, then you have to create symlink with command 'mklink /D' e.g. 
-<code bash> 
-mklink /D d:\Projekty\BCV\CzechIdMng\Realization\frontend\czechidm-app\czechidm-modules\czechidm-acc d:\Projekty\BCV\CzechIdMng\Realization\frontend\czechidm-acc 
 </code> </code>
-</note> 
  
-Go to the example module. You can use symlink in czechidm-modules.+  * Check that you can read from the tables of the database. As in the previous point, connect to the PostgreSQL database and try to select data from any of the IdM tables. If you have insufficient access rights, check the owner and grants for the schema "public". If the user idmadmin is not an owner, there must be GRANT on schema public to the user idmadmin or to "public". 
 +  * Check the error message in the server output console.
  
-<code bash> +==== Common error messages ====
-cd czechidm-example +
-</code>+
  
-Install NPM dependencies.+''Initialization of bean failed; nested exception is org.flywaydb.core.api.FlywayException: Validate failed: Migration checksum mismatch for migration 7.07.004''  means that your database was already used for some other version of CzechIdM (you can check used Flyway versions in the tables idm\_schema\_version\_xxx). This can happen if you switch to some older development branch. The easiest solution for the **developer**  (you will lose all your prepared data in IdM!) is to drop the database (''DROP DATABASE bcv\_idm\_storage'') and create it again (see the part ''CREATE DATABASE''  of [[#install_postgresql|Install PostgreSQL]]). Or you can create a different database and set its name to the ''application-dev.properties''  temporarily.
  
-<code bash> +''Initialization of bean failed; nested exception is org.flywaydb.core.api.FlywayException: Found more than one migration with version 7.07.004''  means literally that there is a duplicity in Flyway scripts versions. This has to be fixed by the authors of the scripts by renaming one of the script that use the same version. The log will tell you where to find the duplicity: 
-npm install +<code>
-</code>+
  
-Go to app module.+Offenders: 
 +-> ... idm-core-impl-7.7.0-SNAPSHOT.jar!/eu/bcvsolutions/idm/core/sql/postgresql/V7_07_004__automatic-role.sql (SQL) 
 +-> ... idm-core-impl-7.7.0-SNAPSHOT.jar!/eu/bcvsolutions/idm/core/sql/postgresql/V7_07_004__add-index-template-name.sql (SQL)
  
-<code bash> 
-cd ../../ 
 </code> </code>
  
-===== Install the dependencies for external module =====+Just increase the version in the name of one of the scripts, clean & build the project again.
  
-If you are developing a custom module (for example named as "czechidm-ext") that is not part of our product, you need to do the following:+=== Could not create Vfs.Dir from url ===
  
-  * We have the product installed in the projects/CzechIdM/ folder. +**This isn't error just warning**. You may don't interest about this warning. Warning is only when you start local development environment and you configuration for ic connectors path isn't correctly setup. Dont worry about this warning.
-  * The czechidm-app module is in the projects/CzechIdM/Realization/frontend/czechidm-app/. +
-  * For example, the externally developed module (frontend part) czechidm-ext is in the projects/ExternalModule/Realization/frontend/czechidm-ext/ folder.+
  
-First, we create the symlink to the "czechidm-ext" module:+<code> 
 +2019-07-18 10:01:20.436  WARN 31049 --- [ost-startStop-1] org.reflections.Reflections              : could not create Vfs.Dir from url. ignoring the exception and continuing
  
-<code bash> +org.reflections.ReflectionsException: could not create Vfs.Dir from url, no matching UrlType was found [file:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/libatk-wrapper.so] 
-cd projects/CzechIdM/Realization/frontend/czechidm-app/czechidm-modules +either use fromURL(final URL url, final List<UrlType> urlTypes) or use the static setDefaultURLTypes(final List<UrlType> urlTypes) or addDefaultURLTypes(UrlType urlType) with your specialized UrlType.
-ln -s ../../../../../ExternalModule/Realization/frontend/czechidm-ext +
-</code>+
  
-Then we create a symlink from the external module to the product "node_modules". This prevents the problem with multiple copies of React (https://facebook.github.io/react/warnings/refs-must-have-owner.html). The goal is to have only one node_modules directory (for all modules) with React. 
- 
-<code bash> 
-cd ../../../../../ExternalModule/Realization/frontend/czechidm-ext 
-ln -s ../../../../CzechIdM/Realization/frontend/node_modules 
 </code> </code>
  
-===== Make all modules together =====+===== Frontend build fails =====
  
-After when we have installed all required modules, we have to copy them together. Its means create symlinks from czechidm-modules to app node_modules.+==== Out of memory ====
  
-<code bash> +If your gulp build fails with the following error:
-cd ../czechidm-app +
-gulp makeModules +
-</code>+
  
-===== Test =====+<code> 
 +[INFO] [18:43:00] Starting 'browserify'... 
 +[INFO] [18:45:30] Finished 'browserify' after 2.5 min 
 +[INFO] [18:45:30] Finished 'build' after 3.12 min 
 +[INFO] 
 +[INFO] <--- Last few GCs ---> 
 +[INFO] 
 +[INFO] 192087 ms: Scavenge 1282.6 (1434.8) -> 1282.1 (1434.8) MB, 3.8 / 0 ms (+ 3.8 ms in 9 steps since last GC) [allocation failure]. 
 +[INFO] 192095 ms: Scavenge 1282.6 (1434.8) -> 1282.2 (1434.8) MB, 3.6 / 0 ms (+ 3.3 ms in 8 steps since last GC) [allocation failure]. 
 +[INFO] 192102 ms: Scavenge 1282.6 (1434.8) -> 1282.1 (1434.8) MB, 3.7 / 0 ms (+ 2.9 ms in 7 steps since last GC) [allocation failure]. 
 +[INFO] 
 +[INFO] 
 +[INFO] <--- JS stacktrace ---> 
 +[INFO] Cannot get stack trace in GC. 
 +[ERROR] FATAL ERROR: Scavenger: semi-space copy 
 +[ERROR] Allocation failed - process out of memory 
 +[ERROR] 1: node::Abort() [gulp]
  
-<code bash> 
-gulp test 
 </code> </code>
  
-===== Select IDE for frontend environment =====+Try following:
  
-You can use any text editor or JavaScript IDE. We recommend to use ATOM +  * Go to ''Realization/frontend/czechidm-app/''  and delete ''node\_modules''. Then start the build again (''npm install''  etc.) 
-  * See [[devel:dev:quickstart:ide:atom|ATOM tutorial]]+  * If you build BE+FE of a project together, check the ''pom.xml''  of the app module - the configuration properties ''nodeVersion''  and ''npmVersion''. They should be the same as the product currently supports (check the [[https://github.com/bcvsolutions/CzechIdMng/blob/develop/Realization/backend/app/pom.xml|app module of the product]]): 
 +<code>
  
-====== 6. Run backend and frontend together ======+                        <execution> 
 +                                <id>install node and npm</id> 
 +                                <goals> 
 +                                    <goal>install-node-and-npm</goal> 
 +                                </goals> 
 +                                <phase>generate-resources</phase> 
 +                                <configuration> 
 +                                    <nodeVersion>v10.15.3</nodeVersion> 
 +                                    <npmVersion>6.4.1</npmVersion> 
 +                                </configuration> 
 +                        </execution>
  
-Assume running backend from the previous steps. 
- 
-In the project root folder: 
- 
-Start frontend 
- 
-<code bash> 
-cd CzechIdM/Realization/frontend/czechidm-app 
-gulp 
 </code> </code>
  
-A new browser window or tab will open with [[https://localhost:3000]] automatically (this could take some time).+  * try adding ''\–max\_old\_space\_size=4096''  to the ''gulp''  command. Or if you build BE+FE together by app module, try adding it in the pom.xml of the app:
  
-The frontend is fully started after you see in following line in log:+<code> 
 +                                                         <execution> 
 +                                                                <id>gulp build</id> 
 +                                                                <goals> 
 +                                                                        <goal>gulp</goal> 
 +                                                                </goals> 
 +                                                                <phase>generate-resources</phase> 
 +                                                                <configuration> 
 +                                                                        <arguments>build -p ${frontend.profile} -s ${frontend.stage} --max_old_space_size=4096</arguments> 
 +                                                                        <workingDirectory>../../frontend/czechidm-app</workingDirectory> 
 +                                                                        <installDirectory>target</installDirectory> 
 +                                                                </configuration> 
 +                                                        </execution>
  
-<code bash> 
-[BS] 1 file changed (app.js) 
 </code> </code>
  
-After the application is running, log in: +==== Wrong layout and NPM version ====
-  * username: admin +
-  * password: admin+
  
-<note tip>If the app shows error with permission, log out</note> +If your frontend looks like this: [[https://redmine.czechidm.com/issues/1752|https://redmine.czechidm.com/issues/1752]], check following:
-<note tip>To use CzechIdM in more windows or tabs for development purposes go to [[http://localhost:3001/]] to **BrowserSync** administration and then go to **SyncOptions** and disable everything except **CodeSync**</note>+
  
-Congratulations! Your CzechIdM development environment is ready to use. +  * there is package-lock.json file in the frontend app module and it looks like this: [[https://github.com/bcvsolutions/CzechIdMng/blob/develop/Realization/frontend/czechidm-app/package-lock.json|https://github.com/bcvsolutions/CzechIdMng/blob/develop/Realization/frontend/czechidm-app/package-lock.json]] 
- +  * NPM version which you use when building frontend (or FE+BE) is at least 6.
- +
-====== Common development errors & tips ====== +
- +
-===== Tomcat server fails to start ===== +
- +
-If Tomcat server fails to start, try following: +
-  * Increase the timeout for Tomcat server Start (see [[devel:dev:quickstart:ide:eclipse#install_tomcat|Install Tomcat]]) +
-  * Check that PostgreSQL server is running. +
-<code bash> +
-systemctl status postgresql.service +
-</code> +
-  * Check that PostgreSQL database exists and the user can connect: Use the credentials filled in ''idm-app/src/main/resources/application-dev.properties'' and try to connect to the PostgreSQL database written in the datasource URL. E.g. for this setup:+
 <code> <code>
-spring.datasource.url=jdbc:postgresql://localhost:5432/bcv_idm_storage 
-spring.datasource.username=idmadmin 
-spring.datasource.password=idmadmin 
-</code> 
-use the following command and type the password when asked for it. 
-<code bash> 
-psql -h 127.0.0.1 -U idmadmin bcv_idm_storage 
-</code> 
-  * Check that you can read from the tables of the database. As in the previous point, connect to the PostgreSQL database and try to select data from any of the IdM tables. If you have insufficient access rights, check the owner and grants for the schema "public". If the user idmadmin is not an owner, there must be GRANT on schema public to the user idmadmin or to "public". 
-  * Check the error message in the server output console. 
  
-==== Common error messages ====+npm -v 
 +6.4.1
  
-''Initialization of bean failed; nested exception is org.flywaydb.core.api.FlywayException: Validate failed: Migration checksum mismatch for migration 7.07.004'' means that your database was already used for some other version of CzechIdM (you can check used Flyway versions in the tables idm\_schema\_version\_xxx). This can happen if you switch to some older development branch. The easiest solution for the **developer** (you will lose all your prepared data in IdM!) is to drop the database (''DROP DATABASE bcv\_idm\_storage'') and create it again (see the part ''CREATE DATABASE'' of [[#install_postgresql|Install PostgreSQL]]). Or you can create a different database and set its name to the ''application-dev.properties'' temporarily. 
- 
-''Initialization of bean failed; nested exception is org.flywaydb.core.api.FlywayException: Found more than one migration with version 7.07.004'' means literally that there is a duplicity in Flyway scripts versions. This has to be fixed by the authors of the scripts by renaming one of the script that use the same version. The log will tell you where to find the duplicity: 
-<code> 
-Offenders: 
--> ... idm-core-impl-7.7.0-SNAPSHOT.jar!/eu/bcvsolutions/idm/core/sql/postgresql/V7_07_004__automatic-role.sql (SQL) 
--> ... idm-core-impl-7.7.0-SNAPSHOT.jar!/eu/bcvsolutions/idm/core/sql/postgresql/V7_07_004__add-index-template-name.sql (SQL) 
 </code> </code>
-Just increase the version in the name of one of the scripts, clean & build the project again. 
  
  
-=== Could not create Vfs.Dir from url === 
-**This isn't error just warning**. You may don't interest about this warning. Warning is only when you start local development environment and you configuration for ic connectors path isn't correctly setup. Dont worry about this warning. 
- 
-<code> 
-2019-07-18 10:01:20.436  WARN 31049 --- [ost-startStop-1] org.reflections.Reflections              : could not create Vfs.Dir from url. ignoring the exception and continuing 
- 
-org.reflections.ReflectionsException: could not create Vfs.Dir from url, no matching UrlType was found [file:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/ext/libatk-wrapper.so] 
-either use fromURL(final URL url, final List<UrlType> urlTypes) or use the static setDefaultURLTypes(final List<UrlType> urlTypes) or addDefaultURLTypes(UrlType urlType) with your specialized UrlType. 
-</code> 
  • by kopro