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Version 23.0.0.6
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    • Version 24.0.0.12
    • Version 24.0.0.9
    • Version 24.0.0.6
    • Version 24.0.0.3
    • Version 23.0.0.12
    • Version 23.0.0.9
    • Version 23.0.0.6

Docs overview

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  • Basics
    • Zero migration
    • Dev mode
    • Java SE support
    • Installing Open Liberty beta releases
    • Develop with Liberty Tools
    • Guide: Getting started with Open Liberty
  • Development
    • Cloud-native microservices
    • MicroProfile overview
    • Jakarta EE overview
    • Container images
      • Verify signatures for container images in Open Liberty
    • RESTful services
      • Sync and async REST clients
      • REST clients
      • JSON-P and JSON-B
      • Send and receive multipart/form-data parts
      • Guides: RESTful services
      • Guides: Getting started
    • Alternatives to REST
      • Build GraphQL applications
      • Provide and consume gRPC services
      • Send bidirectional messages among services with WebSocket
      • Guides: REST alternatives
    • Documenting APIs
      • Guide: Documenting RESTful APIs
    • External configuration of microservices
      • MicroProfile Config properties
      • Guides: Configuration
    • Context and Dependency Injection
      • RESTful Web Services integration with CDI
      • Guide: Injecting dependencies into microservices
    • Data persistence
      • Relational database connections with JDBC
      • Kerberos authentication for JDBC
      • Data persistence with JPA
      • Access NoSQL databases with CDI
      • Create a database table for session persistence
      • Guides: Persistence
    • Transaction recovery
    • Distributed caching with JCache
      • Distributed session caching
      • Configuring Infinispan as a JCache provider
    • Observability
      • Microservice observability with metrics
      • Choose your own monitoring tools with MicroProfile Metrics
      • Health checks for microservices
      • Enable distributed tracing
      • Guides: Observability
    • Testing
      • Guides: Testing
    • Fault tolerance
      • Resilient asynchronous programming
      • Guides: Fault tolerance
    • Concurrency
      • Concurrency with MicroProfile Context Propagation
    • Async input and output
  • Security
    • Authentication
      • Authentication filters
      • Authentication cache
      • User registries
    • Single sign-on
      • Kerberos authentication
      • Track logged-out SSO cookies
      • Configuring SPNEGO authentication
      • Enable an OpenID Connect client
    • Authorization
    • Secure communication with TLS
      • Automatic certificate management with ACME
    • Security hardening
      • Server configuration
      • Network
      • Application configuration
    • Password encryption limitations
    • Audit logs
    • Verifying release package signatures
    • Run FIPS-compliant applications
    • Security vulnerability list
    • Troubleshooting security
    • Guides: Security
  • Deployment
    • Deployment on OpenShift
    • Open Liberty Operator
    • Container images
    • Faster startup with InstantOn
      • InstantOn system calls
      • InstantOn limitations and known issues
    • Runnable JAR files
    • Class loader configuration
    • Virtual hosts
    • Application bindings
    • Guides: Kubernetes
    • Guides: Cloud deployment
  • Operations
    • Logs
      • Log management
      • HTTP access logging
      • JDBC tracing
      • JSON log events reference list
      • Logstash events reference list
      • Audit log events (CADF) reference list
      • Analyzing JSON logs with Elastic Stack
      • Forwarding logs with Logstash collector
    • Metrics
      • Metrics reference list
      • Configuring JMX connections
      • JMX metrics reference list
    • Slow and hung request detection
    • Validating server connections
    • Admin Center GUI
      • Admin Center OIDC tools
    • Performance tuning
      • Thread pool tuning
  • Reference
    • Directory locations and properties
    • Default environment variables
    • Default port numbers
    • Bootstrap properties
    • Server configuration
      • acmeCA
      • acmeRevocationChecker
      • acmeTransportConfig
      • activationSpec
      • activedLdapFilterProperties
      • adminObject
      • administrator-role
      • application
      • applicationManager
      • applicationMonitor
      • auditEvent
      • auditFileHandler
      • authCache
      • authData
      • authFilter
      • authentication
      • authorization-roles
      • basicRegistry
      • batchJmsDispatcher
      • batchJmsEvents
      • batchJmsExecutor
      • batchJobLogging
      • batchPersistence
      • bell
      • cache
      • cacheManager
      • cachingProvider
      • cdi
      • cdi12
      • channelfw
      • classloader
      • classloading
      • cloudant
      • cloudantDatabase
      • compression
      • concurrencyPolicy
      • config
      • connectionFactory
      • connectionManager
      • constrainedDelegation
      • contextService
      • cors
      • couchdb
      • customLdapFilterProperties
      • dataSource
      • databaseStore
      • distributedMap
      • domainResolver
      • domino50LdapFilterProperties
      • edirectoryLdapFilterProperties
      • ejbApplication
      • ejbContainer
      • enterpriseApplication
      • eventLogging
      • executor
      • facebookLogin
      • featureManager
      • federatedRepository
      • fileset
      • githubLogin
      • googleLogin
      • grpc
      • grpcClient
      • headers
      • httpAccessLogging
      • httpDispatcher
      • httpEncoding
      • httpEndpoint
      • httpOptions
      • httpProxyRedirect
      • httpSession
      • httpSessionCache
      • httpSessionDatabase
      • idsLdapFilterProperties
      • iiopEndpoint
      • iiopServerPolicies
      • include
      • iplanetLdapFilterProperties
      • jaasLoginContextEntry
      • jaasLoginModule
      • javaPermission
      • jdbcDriver
      • jmsActivationSpec
      • jmsConnectionFactory
      • jmsDestination
      • jmsQueue
      • jmsQueueConnectionFactory
      • jmsTopic
      • jmsTopicConnectionFactory
      • jndiEntry
      • jndiObjectFactory
      • jndiReferenceEntry
      • jndiURLEntry
      • jpa
      • jspEngine
      • jwtBuilder
      • jwtConsumer
      • jwtSso
      • kerberos
      • keyStore
      • ldapRegistry
      • library
      • linkedinLogin
      • logging
      • logstashCollector
      • ltpa
      • mailSession
      • managedExecutorService
      • managedScheduledExecutorService
      • managedThreadFactory
      • messagingEngine
      • mimeTypes
      • mongo
      • mongoDB
      • monitor
      • mpJwt
      • mpMetrics
      • netscapeLdapFilterProperties
      • oauth-roles
      • oauth2Login
      • oauthProvider
      • oidcClientWebapp
      • oidcLogin
      • okdServiceLogin
      • openId
      • openidConnectClient
      • openidConnectProvider
      • orb
      • persistentExecutor
      • pluginConfiguration
      • quickStartSecurity
      • reader-role
      • remoteFileAccess
      • remoteIp
      • requestTiming
      • resourceAdapter
      • samesite
      • samlWebSso20
      • securewayLdapFilterProperties
      • sipApplicationRouter
      • sipContainer
      • sipEndpoint
      • sipStack
      • socialLoginWebapp
      • spnego
      • springBootApplication
      • ssl
      • sslDefault
      • sslOptions
      • tcpOptions
      • transaction
      • trustAssociation
      • twitterLogin
      • userInfo
      • variable
      • virtualHost
      • wasJmsEndpoint
      • wasJmsOutbound
      • webAppSecurity
      • webApplication
      • webContainer
      • webTarget
      • wsAtomicTransaction
      • wsSecurityClient
      • wsSecurityProvider
      • wsocOutbound
    • Features
      • Admin Center
      • Admin Local Connector
      • Admin REST Connector
      • Application Security (Jakarta Security )
      • Application Security for Client
      • Audit
      • Automatic Certificate Management Environment (ACME) Support
      • Basic Extensions using Liberty Libraries
      • Batch Management
      • Cloudant Integration
      • CouchDB Integration
      • Database Session Persistence
      • Distributed Map interface for Dynamic Caching
      • Event Logging
      • Federated User Registry
      • gRPC
      • gRPC Client
      • Jakarta Application Client Support for Server
      • Jakarta Authentication
      • Jakarta Authorization
      • Jakarta Batch
      • Jakarta Bean Validation
      • Jakarta Concurrency
      • Jakarta Connectors
      • Jakarta Connectors Inbound Security
      • Jakarta Contexts and Dependency Injection
      • Jakarta EE Application Client
      • Jakarta EE Platform
      • Jakarta EE Web Profile
      • Jakarta Enterprise Beans
      • Jakarta Enterprise Beans Home Interfaces
      • Jakarta Enterprise Beans Lite
      • Jakarta Enterprise Beans Message-Driven Beans
      • Jakarta Enterprise Beans Persistent Timers
      • Jakarta Enterprise Beans Remote
      • Jakarta Expression Language
      • Jakarta Faces
      • Jakarta Faces Container
      • Jakarta JSON Binding
      • Jakarta JSON Binding Container
      • Jakarta JSON Processing
      • Jakarta JSON Processing Container
      • Jakarta Mail
      • Jakarta Managed Beans
      • Jakarta Messaging
      • Jakarta Persistence
      • Jakarta Persistence Container
      • Jakarta RESTful Web Services
      • Jakarta RESTful Web Services Client
      • Jakarta Server Pages
      • Jakarta Servlet
      • Jakarta WebSocket
      • Jakarta XML Binding
      • Jakarta XML Web Services
      • Java Database Connectivity
      • Java EE Full Platform
      • Java Naming and Directory Interface
      • JavaScript Object Notation for Java
      • JCache Session Persistence
      • JEE Management
      • JMS Message-Driven Beans
      • JSON Web Token
      • JSON Web Token Single Sign-On
      • Kerberos Constrained Delegation for SPNEGO
      • LDAP User Registry
      • Liberty Kernel
      • Logstash Collector
      • Messaging Server
      • Messaging Server Client
      • Messaging Server Security
      • MicroProfile
      • MicroProfile Config
      • MicroProfile Context Propagation
      • MicroProfile Fault Tolerance
      • MicroProfile GraphQL
      • MicroProfile Health
      • MicroProfile JSON Web Token
      • MicroProfile Metrics
      • MicroProfile OpenAPI
      • MicroProfile OpenTracing
      • MicroProfile Reactive Messaging
      • MicroProfile Reactive Streams
      • MicroProfile Rest Client
      • MicroProfile Telemetry
      • MongoDB Integration
      • OAuth
      • OpenAPI
      • OpenID
      • OpenID Connect Client
      • OpenID Connect Provider
      • Opentracing
      • OSGi Debug Console
      • Password Utilities
      • Performance Monitoring
      • Request Timing
      • SAML Web Single Sign-On
      • Secure Socket Layer
      • Simple and Protected GSSAPI Negotiation Mechanism
      • SIP Servlet
      • Social Media Login
      • Spring Boot Support
      • Transport Security
      • Web Response Cache
      • Web Service Security
      • WS-AT Service
      • WSSecurity SAML
    • Commands
      • auditUtility auditReader
      • featureUtility commands
        • find
        • help
        • installFeature
        • installServerFeatures
        • viewSettings
      • securityUtility commands
        • createLTPAKeys
        • createSSLCertificate
        • encode
        • help
      • schemaGen
      • serverSchemaGen
      • server commands
        • create
        • debug
        • dump
        • help
        • javadump
        • list
        • package
        • pause
        • resume
        • run
        • start
        • status
        • stop
        • version
      • springbootUtility commands
        • help
        • thin
    • Jakarta EE API
      • Jakarta EE 10
      • Jakarta EE 9.1
      • Jakarta EE 8
      • Differences between Jakarta EE 10.0 and 9.1
      • Differences between Jakarta EE 9.1 and 8.0
      • Jakarta EE 9.1 feature updates
    • Java EE API
      • Java EE 8
      • Java EE 7
    • MicroProfile API
      • MicroProfile 6.0
      • MicroProfile 5.0
      • MicroProfile 4.1
      • MicroProfile 4.0
      • MicroProfile 3.3
      • MicroProfile 3.2
      • MicroProfile 3.0
      • MicroProfile 2.2
      • MicroProfile 2.1
      • MicroProfile 2.0
      • MicroProfile 1.4
      • MicroProfile 1.3
      • MicroProfile 1.2
      • Differences between MicroProfile 6.0 and 5.0
      • Differences between MicroProfile 5.0 and 4.1
      • Differences between MicroProfile 4.0 and 3.3
      • Differences between MicroProfile 3.0 and 2.2
      • Differences between MicroProfile 2.2 and 2.1
    • Open Liberty APIs
      • Admin REST Connector
        • com.ibm.websphere.filetransfer
        • com.ibm.websphere.jmx.connector.rest
        • com.ibm.ws.jmx.connector.client.rest
      • Application Security for Client
        • com.ibm.websphere.security
        • com.ibm.websphere.security.auth.callback
        • com.ibm.wsspi.security.auth.callback
      • Distributed Map interface for Dynamic Caching
        • com.ibm.websphere.cache
        • com.ibm.websphere.cache.exception
        • com.ibm.websphere.exception
        • com.ibm.ws.cache.spi
        • com.ibm.wsspi.cache
      • Enterprise JavaBeans Lite
        • com.ibm.websphere.ejbcontainer
        • com.ibm.websphere.ejbcontainer.mbean
      • JEE Management
        • com.ibm.websphere.management.j2ee
      • JSON Web Token
        • com.ibm.websphere.security.jwt
      • Jakarta Authorization
        • com.ibm.wsspi.security.authorization.jacc
      • Jakarta Authorization
        • com.ibm.wsspi.security.authorization.jacc
      • Jakarta Enterprise Beans Lite
        • com.ibm.websphere.ejbcontainer
        • com.ibm.websphere.ejbcontainer.mbean
      • Jakarta RESTful Web Services Client
        • com.ibm.websphere.jaxrs20.multipart
      • Jakarta RESTful Web Services Client
        • com.ibm.websphere.jaxrs20.multipart
      • Jakarta Servlet
        • com.ibm.websphere.servlet.container
        • com.ibm.websphere.servlet.context
        • com.ibm.websphere.servlet.error
        • com.ibm.websphere.servlet.event
        • com.ibm.websphere.servlet.session
        • com.ibm.websphere.webcontainer
        • com.ibm.wsspi.servlet.session
      • Jakarta Servlet
        • com.ibm.websphere.servlet.container
        • com.ibm.websphere.servlet.context
        • com.ibm.websphere.servlet.error
        • com.ibm.websphere.servlet.event
        • com.ibm.websphere.servlet.session
        • com.ibm.websphere.webcontainer
        • com.ibm.wsspi.servlet.session
      • Jakarta WebSocket
        • com.ibm.websphere.wsoc
      • Jakarta WebSocket
        • com.ibm.websphere.wsoc
      • Java Authorization Contract for Containers
        • com.ibm.wsspi.security.authorization.jacc
      • Java RESTful Services Client
        • com.ibm.websphere.jaxrs.providers.json4j
        • com.ibm.websphere.jaxrs20.multipart
      • Java Servlets
        • com.ibm.websphere.servlet.container
        • com.ibm.websphere.servlet.context
        • com.ibm.websphere.servlet.error
        • com.ibm.websphere.servlet.event
        • com.ibm.websphere.servlet.session
        • com.ibm.websphere.webcontainer
        • com.ibm.wsspi.servlet.session
      • Java Servlets
        • com.ibm.websphere.servlet.container
        • com.ibm.websphere.servlet.context
        • com.ibm.websphere.servlet.error
        • com.ibm.websphere.servlet.event
        • com.ibm.websphere.servlet.session
        • com.ibm.websphere.webcontainer
        • com.ibm.wsspi.servlet.session
      • Java WebSocket
        • com.ibm.websphere.wsoc
      • Java WebSocket
        • com.ibm.websphere.wsoc
      • JavaScript Object Notation for Java
        • com.ibm.json.java
        • com.ibm.json.xml
      • Kerberos Constrained Delegation for SPNEGO
        • com.ibm.websphere.security.s4u2proxy
      • Message Server
        • com.ibm.websphere.messaging.mbean
      • Messaging Server
        • com.ibm.websphere.messaging.mbean
      • OAuth
        • com.ibm.oauth.core.api.attributes
        • com.ibm.oauth.core.api.config
        • com.ibm.oauth.core.api.error
        • com.ibm.oauth.core.api.error.oauth20
        • com.ibm.oauth.core.api.oauth20.mediator
        • com.ibm.websphere.security.oauth20
        • com.ibm.websphere.security.oauth20.store
        • com.ibm.websphere.security.openidconnect.token
        • com.ibm.wsspi.security.oauth20.token
      • OpenID Connect Client
        • com.ibm.websphere.security.openidconnect
      • OpenID Connect Provider
        • com.ibm.websphere.security.openidconnect
      • Password Utilities
        • com.ibm.websphere.crypto
        • com.ibm.websphere.security.auth.data
        • com.ibm.websphere.security.jca
      • Password Utilities
        • com.ibm.websphere.crypto
        • com.ibm.websphere.security.auth.data
        • com.ibm.websphere.security.jca
      • Performance Monitoring
        • com.ibm.websphere.monitor.jmx
      • SIP Servlet
        • com.ibm.websphere.sip
        • com.ibm.websphere.sip.resolver
        • com.ibm.websphere.sip.resolver.events
        • com.ibm.websphere.sip.resolver.exception
        • com.ibm.websphere.sip.unmatchedMessages
        • com.ibm.websphere.sip.unmatchedMessages.events
      • Secure Socket Layer
        • com.ibm.websphere.ssl
      • Social Media Login
        • com.ibm.websphere.security.social
      • Web Response Cache
        • com.ibm.websphere.command
        • com.ibm.websphere.command.web
        • com.ibm.websphere.servlet.cache
      • gRPC
        • io.openliberty.grpc.annotation
    • Open Liberty SPIs
      • Contexts and Dependency Injection
        • io.openliberty.cdi.spi
      • Contexts and Dependency Injection
        • io.openliberty.cdi.spi
      • Federated User Registry
        • com.ibm.wsspi.security.wim
        • com.ibm.wsspi.security.wim.exception
        • com.ibm.wsspi.security.wim.model
      • Jakarta Authentication
        • com.ibm.wsspi.security.jaspi
      • Jakarta Authentication
        • com.ibm.wsspi.security.jaspi
      • Jakarta Contexts and Dependency Injection
        • io.openliberty.cdi.spi
      • Jakarta Contexts and Dependency Injection
        • io.openliberty.cdi.spi
      • Java Authentication SPI for Containers
        • com.ibm.wsspi.security.jaspi
      • OpenAPI
        • com.ibm.wsspi.openapi31
  • Docs overview
  • Reference
  • Features
  • Liberty Kernel

Liberty Kernel

This feature provides the Liberty kernel, which makes up the core of the Open Liberty runtime.

Feature configuration elements

  • config

  • executor

  • featureManager

  • fileset

  • include

  • logging

  • variable

Liberty API packages provided by this feature

  • com.ibm.websphere.config.mbeans

  • com.ibm.websphere.kernel.server

  • com.ibm.websphere.logging

  • com.ibm.websphere.logging.hpel

  • com.ibm.websphere.logging.hpel.reader

  • com.ibm.websphere.logging.hpel.reader.filters

  • com.ibm.websphere.logging.hpel.writer

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