Hey everyone! We just launched the first Liquibase certification at Liquibase University - Liquibase Fundamentals! If you want to learn more about Liquibase or verify your skills, sign up for free at https://learn.liquibase.com.
Hey everyone! We just launched the first Liquibase certification at Liquibase University - Liquibase Fundamentals! If you want to learn more about Liquibase or verify your skills, sign up for free at https://learn.liquibase.com.
I think its a great time to pick up a devops / db automation certificate!
Hi Kevin,
I just completed my certification but I am not able to add it LinkedIn. I can not find any Credential URL or Credential ID to link to my LinedIn profile. I can download and see it anyway, the certification looks good 
Welcome @abhixkj, I will work with the head of our LMS to help out with getting the cert linked in.
Congratulations on completing the certification! I’ll have Ronak reach out and help you with the credentialing in LinkedIn.
Hello @abhixkj!
I was able to verify that the system did propagate your certification. An email would have been sent to your registered email address. A lot of times this email ends up in a Spam or Junk folder. If you are using Microsoft Outlook, also check your “Other” folder. Here is the receipient view of your certification: See Accreditation .
Hey, thanks guys for the fast response 
, I was able to add it now. It was sent via a separate mail from Accredible. 
Hello All
I am having trouble in Liquibase Fundamental Module-3 where I used mvn liquibase:update and it failed to update.
My pom.xml file modified according the given instructions and I am having troubleshooting the following issue:
Failed to execute goal org.liquibase:liquibase-maven-plugin:4.0.0:update (default-cli) on project Liquih2-app: Execution default-cli of goal org.liquibase:liquibase-maven-plugin:4.0.0:update failed: Plugin org.liquibase:liquibase-maven-plugin:4.0.0 or one of its dependencies could not be resolved: Could not find artifact h2:h2:jar:1.0-SNAPSHOT -> [Help 1]
I am looking forward to receiving your reply soon.
Sincerely
Sar Kong
Dear Alll
I am having a problem with Module-3 mvn liquibase:update with pom.xml complaining - version can neither be null, empty nor blank for h2.
I am grantful if you would shading some light on my problem, please.
I am looking forward to receiving your reply soon.
Many thanks in advance.
Yours sincerly
Sar Kong
sar.kong@gmail.com
The following is my pom.xml
4.0.0
com.my-group.app
Liquih2-app
1.0-SNAPSHOT
org.liquibase
liquibase-maven-plugin
4.0.0
liquibase.properties
h2
h2
The following output with debug mode:X
C:\Users\oracle\app\MavenDBType\MavenH2>mvn -X liquibase:update
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: C:\Program Files\apache-maven-3.6.3\bin…
Java version: 15, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk-15
Default locale: en_AU, platform encoding: Cp1252
OS name: “windows 10”, version: “10.0”, arch: “amd64”, family: “windows”
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG] Imported: javax.annotation.* < plexus.core
[DEBUG] Imported: javax.annotation.security.* < plexus.core
[DEBUG] Imported: javax.enterprise.inject.* < plexus.core
[DEBUG] Imported: javax.enterprise.util.* < plexus.core
[DEBUG] Imported: javax.inject.* < plexus.core
[DEBUG] Imported: org.apache.maven.* < plexus.core
[DEBUG] Imported: org.apache.maven.artifact < plexus.core
[DEBUG] Imported: org.apache.maven.classrealm < plexus.core
[DEBUG] Imported: org.apache.maven.cli < plexus.core
[DEBUG] Imported: org.apache.maven.configuration < plexus.core
[DEBUG] Imported: org.apache.maven.exception < plexus.core
[DEBUG] Imported: org.apache.maven.execution < plexus.core
[DEBUG] Imported: org.apache.maven.execution.scope < plexus.core
[DEBUG] Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG] Imported: org.apache.maven.model < plexus.core
[DEBUG] Imported: org.apache.maven.monitor < plexus.core
[DEBUG] Imported: org.apache.maven.plugin < plexus.core
[DEBUG] Imported: org.apache.maven.profiles < plexus.core
[DEBUG] Imported: org.apache.maven.project < plexus.core
[DEBUG] Imported: org.apache.maven.reporting < plexus.core
[DEBUG] Imported: org.apache.maven.repository < plexus.core
[DEBUG] Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG] Imported: org.apache.maven.settings < plexus.core
[DEBUG] Imported: org.apache.maven.toolchain < plexus.core
[DEBUG] Imported: org.apache.maven.usability < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG] Imported: org.codehaus.classworlds < plexus.core
[DEBUG] Imported: org.codehaus.plexus.* < plexus.core
[DEBUG] Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG] Imported: org.codehaus.plexus.component < plexus.core
[DEBUG] Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG] Imported: org.codehaus.plexus.container < plexus.core
[DEBUG] Imported: org.codehaus.plexus.context < plexus.core
[DEBUG] Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG] Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG] Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core
[DEBUG] Imported: org.eclipse.aether.* < plexus.core
[DEBUG] Imported: org.eclipse.aether.artifact < plexus.core
[DEBUG] Imported: org.eclipse.aether.collection < plexus.core
[DEBUG] Imported: org.eclipse.aether.deployment < plexus.core
[DEBUG] Imported: org.eclipse.aether.graph < plexus.core
[DEBUG] Imported: org.eclipse.aether.impl < plexus.core
[DEBUG] Imported: org.eclipse.aether.installation < plexus.core
[DEBUG] Imported: org.eclipse.aether.internal.impl < plexus.core
[DEBUG] Imported: org.eclipse.aether.metadata < plexus.core
[DEBUG] Imported: org.eclipse.aether.repository < plexus.core
[DEBUG] Imported: org.eclipse.aether.resolution < plexus.core
[DEBUG] Imported: org.eclipse.aether.spi < plexus.core
[DEBUG] Imported: org.eclipse.aether.transfer < plexus.core
[DEBUG] Imported: org.eclipse.aether.version < plexus.core
[DEBUG] Imported: org.fusesource.jansi.* < plexus.core
[DEBUG] Imported: org.slf4j.* < plexus.core
[DEBUG] Imported: org.slf4j.event.* < plexus.core
[DEBUG] Imported: org.slf4j.helpers.* < plexus.core
[DEBUG] Imported: org.slf4j.spi.* < plexus.core
[DEBUG] Populating class realm maven.api
[INFO] Error stacktraces are turned on.
[DEBUG] Message scheme: color
[DEBUG] Message styles: debug info warning error success failure strong mojo project
[DEBUG] Reading global settings from C:\Program Files\apache-maven-3.6.3\bin…\conf\settings.xml
[DEBUG] Reading user settings from C:\Users\oracle.m2\settings.xml
[DEBUG] Reading global toolchains from C:\Program Files\apache-maven-3.6.3\bin…\conf\toolchains.xml
[DEBUG] Reading user toolchains from C:\Users\oracle.m2\toolchains.xml
[DEBUG] Using local repository at C:\Users\oracle.m2\repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for C:\Users\oracle.m2\repository
[INFO] Scanning for projects…
[DEBUG] Extension realms for project com.my-group.app:h2:jar:1.0-SNAPSHOT: (none)
[DEBUG] Looking up lifecycle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] Resolving plugin prefix liquibase from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Resolved plugin prefix liquibase to org.liquibase:liquibase-maven-plugin from POM com.my-group.app:h2:jar:1.0-SNAPSHOT
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: com.my-group.app:h2:jar:1.0-SNAPSHOT
[DEBUG] Tasks: [liquibase:update]
[DEBUG] Style: Regular
[DEBUG] =======================================================================
[INFO]
[INFO] ------------------------< com.my-group.app:h2 >-------------------------
[INFO] Building h2 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[DEBUG] Resolving plugin prefix liquibase from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Resolved plugin prefix liquibase to org.liquibase:liquibase-maven-plugin from POM com.my-group.app:h2:jar:1.0-SNAPSHOT
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] === PROJECT BUILD PLAN ================================================
[DEBUG] Project: com.my-group.app:h2:1.0-SNAPSHOT
[DEBUG] Dependencies (collect):
[DEBUG] Dependencies (resolve): [test]
[DEBUG] Repositories (dependencies): [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] Repositories (plugins) : [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal: org.liquibase:liquibase-maven-plugin:4.0.0:update (default-cli)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
{liquibase.changeLogDirectory}</changeLogDirectory>
<changeLogFile>{liquibase.changeLogFile}
{liquibase.changelogCatalogName}</changelogCatalogName>
<changelogSchemaName>{liquibase.changelogSchemaName}
{liquibase.changesToApply}</changesToApply>
<clearCheckSums default-value="false">{liquibase.clearCheckSums}
{liquibase.contexts}</contexts>
<databaseChangeLogLockTableName>{liquibase.databaseChangeLogLockTableName}
{liquibase.databaseChangeLogTableName}</databaseChangeLogTableName>
<databaseClass>{liquibase.databaseClass}
{liquibase.defaultCatalogName}</defaultCatalogName>
<defaultSchemaName>{liquibase.defaultSchemaName}
{liquibase.driver}</driver>
<dropFirst default-value="false">{liquibase.dropFirst}
{liquibase.emptyPassword}</emptyPassword>
<includeArtifact default-value="true">{liquibase.includeArtifact}
{liquibase.includeTestOutputDirectory}</includeTestOutputDirectory>
<labels default-value="">{liquibase.labels}
{liquibase.liquibaseProLicenseKey}</liquibaseProLicenseKey>
<logging default-value="INFO">{liquibase.logging}
{liquibase.outputDefaultCatalog}</outputDefaultCatalog>
<outputDefaultSchema default-value="false">{liquibase.outputDefaultSchema}
{liquibase.outputFileEncoding}</outputFileEncoding>
<password>{liquibase.password}
{project}</project>
<promptOnNonLocalDatabase default-value="true">{liquibase.promptOnNonLocalDatabase}
liquibase.properties
{liquibase.propertyFileWillOverride}</propertyFileWillOverride>
<propertyProviderClass>{liquibase.propertyProviderClass}
{liquibase.server}</server>
<skip default-value="false">{liquibase.skip}
{liquibase.toTag}</toTag>
<url>{liquibase.url}
{liquibase.username}</username>
<verbose default-value="false">{liquibase.verbose}
[DEBUG] =======================================================================
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=42900, ConflictMarker.markTime=59800, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=13500, ConflictIdSorter.topsortTime=395300, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1080300, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=92200, DefaultDependencyCollector.transformTime=2781500}
[DEBUG] com.my-group.app:h2:jar:1.0-SNAPSHOT
[INFO]
[INFO] — liquibase-maven-plugin:4.0.0:update (default-cli) @ h2 —
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.631 s
[INFO] Finished at: 2020-10-03T16:16:04+10:00
[INFO] ------------------------------------------------------------------------
[ERROR] version can neither be null, empty nor blank
java.lang.IllegalArgumentException: version can neither be null, empty nor blank
at org.apache.commons.lang3.Validate.notBlank (Validate.java:454)
at org.apache.maven.artifact.ArtifactUtils.notBlank (ArtifactUtils.java:107)
at org.apache.maven.artifact.ArtifactUtils.key (ArtifactUtils.java:97)
at org.apache.maven.ReactorReader.findArtifact (ReactorReader.java:101)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve (DefaultArtifactResolver.java:306)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts (DefaultArtifactResolver.java:229)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact (DefaultArtifactResolver.java:207)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom (DefaultArtifactDescriptorReader.java:240)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor (DefaultArtifactDescriptorReader.java:171)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.resolveCachedArtifactDescriptor (DefaultDependencyCollector.java:541)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.getArtifactDescriptorResult (DefaultDependencyCollector.java:524)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.processDependency (DefaultDependencyCollector.java:412)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.processDependency (DefaultDependencyCollector.java:365)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.process (DefaultDependencyCollector.java:352)
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.collectDependencies (DefaultDependencyCollector.java:254)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies (DefaultRepositorySystem.java:284)
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolveInternal (DefaultPluginDependenciesResolver.java:205)
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve (DefaultPluginDependenciesResolver.java:152)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.createPluginRealm (DefaultMavenPluginManager.java:404)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupPluginRealm (DefaultMavenPluginManager.java:374)
at org.apache.maven.plugin.DefaultBuildPluginManager.getPluginRealm (DefaultBuildPluginManager.java:234)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:105)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:64)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:564)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[ERROR]
Welcome @sarkong!
This error message concerned me:
Don’t think this is a liquibase problem but a config issue of maven. To diagnose could you your pom.xml and settings.xml (please redact password and user id).
Ronak