JMS-related Services JTA Transaction Recovery Service
8.1.1 Migratable Services
WebLogic Server supports service-level migration for JMS-related services, the JTA Transaction Recovery Service, and user-defined singleton services. These are referred to as migratable services, because you can move them from one server to another within a cluster. The following migratable services can be configured for automatic or manual migration.8.1.1.1 JMS-related Services
JMS services are singleton services, and, therefore, are not active on all server instances in a cluster. Instead, they are pinned to a single server in the cluster to preserve data consistency. To ensure that singleton JMS services do not introduce a single point of failure for dependent applications in the cluster, WebLogic Server can be configured to automatically or manually migrate them to any server instance in the migratable target list. ■ JMS Server—management containers for the queues and topics in JMS modules that are targeted to them. See JMS Server Configuration in Configuring and Managing JMS for Oracle WebLogic Server. ■ Store-and-Forward SAF Service—store-and-forward messages between local sending and remote receiving endpoints, even when the remote endpoint is not available at the moment the messages are sent. Only sending SAF agents configured for JMS SAF sending capability only are migratable. See Configuring and Managing Store-and-Forward for Oracle WebLogic Server. ■ Path Service—a persistent map that can be used to store the mapping of a group of messages in a JMS Message Unit-of-Order to a messaging resource in a cluster. It provides a way to enforce ordering by pinning messages to a member of a cluster hosting servlets, distributed queue members, or Store-and-Forward agents. One path service is configured per cluster. See Using the WebLogic Path Service in Configuring and Managing JMS for Oracle WebLogic Server. ■ Custom Persistent Store—a user-defined, disk-based file store or JDBC-accessible database for storing subsystem data, such as persistent JMS messages or store-and-forward messages. See Using the WebLogic Persistent Store in Configuring Server Environments for Oracle WebLogic Server. Service Migration 8-38.1.1.2 JTA Transaction Recovery Service
The Transaction Recovery Service automatically attempts to recover transactions on system startup by parsing all transaction log records for incomplete transactions and completing them. For detailed information, see Transaction Recovery After a Server Fails in Programming JTA for Oracle WebLogic Server.8.1.1.3 User-defined Singleton Services
Parts
» Oracle Fusion Middleware Online Documentation Library
» Document Scope and Audience Guide to this Document
» What Are the Benefits of Clustering? What Are the Key Capabilities of a Cluster?
» Servlets and JSPs EJBs and RMI Objects
» Getting Connections with Clustered JDBC Failover and Load Balancing for JDBC Connections
» Pure-Java Versus Native Socket Reader Implementations
» Client Communication via Sockets
» How WebLogic Server Creates the Cluster-Wide JNDI Tree
» How WebLogic Server Updates the JNDI Tree Client Interaction with the Cluster-Wide JNDI Tree
» Load Balancer Configuration Requirements Load Balancers and the WebLogic Session Cookie
» Related Programming Considerations How Session Connection and Failover Works with a Load Balancer
» Round-Robin Load Balancing Weight-Based Load Balancing
» Transactional Collocation Optimization for Collocated Objects
» Methods of Configuring Clusters Load Balancing for JDBC Connections
» Using Replication Groups HTTP Session State Replication
» Connection with Load Balancing Hardware Failover with Load Balancing Hardware
» Configuration Requirements for Cross-Cluster Replication
» Configuring Session State Replication Across Clusters
» Clustering Objects with Replica-Aware Stubs
» Failover and JDBC Connections Understanding Server and Service Migration
» Migration Terminology Oracle Fusion Middleware Online Documentation Library
» Features That Use Leasing Leasing Versions
» Determining Which Type of Leasing To Use High-availability Database Leasing
» Non-database Consensus Leasing Leasing
» Preparing for Automatic Whole Server Migration
» Configuring Automatic Whole Server Migration
» Startup Process in a Cluster with Migratable Servers
» Automatic Whole Server Migration Process
» Manual Whole Server Migration Process Administration Server Role in Whole Server Migration
» Migratable Server Behavior in a Cluster Node Manager Role in Whole Server Migration
» Cluster Master Role in Whole Server Migration
» JMS-related Services JTA Transaction Recovery Service
» Custom Store Availability for JMS Services Default File Store Availability for JTA
» Best Practices for Targeting JMS when Configuring Automatic Service Migration
» Architecture Web Application Tiers
» Combined Tier Architecture De-Militarized Zone DMZ Load Balancer Proxy Plug-In
» No Collocation Optimization Firewall Restrictions
» Multi-Tier Proxy Architecture Proxy Architecture Benefits Proxy Architecture Limitations
» Proxy Plug-In Versus Load Balancer
» DMZ with Two Firewall Configuration
» Dynamic Cluster Address If you do not explicitly define a cluster address
» Configuration Roadmap Install WebLogic Server
» Starting a WebLogic Server Cluster
» Configure Node Manager Configure Load Balancing Method for EJBs and RMIs
» Sample web.xml This section contains a sample deployment descriptor file
» Accessing Applications Via the Proxy Server Ensure that applications clients will
» Configure Replication Groups Configure Migratable Targets for Pinned Services
» Migrating When the Currently Active Host is Unavailable Use this migration
» Configure Multicast Time-To-Live TTL Configure Multicast Buffer Size
» Cluster-Related Configuration Options Follow Usage and Configuration Guidelines
» Manual Migration of the JTA Transaction Recovery Service State Management in a Cluster
» Naming Considerations Administration Server Considerations
» Firewall Considerations Avoiding Problems
» Check the Server Version Numbers Check the Multicast Address Check the CLASSPATH Value
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