Adaptive Decision Manager installation changes to support delayed learning
Valid from Pega Version 7.1.7
To support delayed adaptive learning, Adaptive Decision Manager (ADM) has been enhanced with database schema changes and no longer relies on Hibernate. This change has an impact in the way ADM is set up in the Decision Management service layer: the jdbc/admDataSource resource is now superseded by jdbc/adm7DataSource.
Additionally, Pega 7.1.7 further simplifies the ADM deployment by providing a single enterprise application or web archive:
- Single EAR deployment archive that can used when deploying ADM on IBM WebSphere and Oracle WebLogic
- Single WAR deployment archive that can be used when deploying ADM on Tomcat and JBoss
Improved full text search
Valid from Pega Version 7.1.7
In Pega 7.1.7, Elasticsearch is used to provide full-text search functionality for rules, work, and data content, replacing the existing Lucene search functionality. In addition to providing search results two to five times more quickly than with Lucene Search, Elasticsearch is more scalable: with multi-threaded bulk and incremental indexing, it provides enhanced information about the search queue, the ability to host index files on multiple nodes, a more robust and expressive search parser, the ability to configure thresholds for alerts and search query time-outs, and automatic handling of replication and failover.
The search management user interface, where you can see length of queue and age of entries, which node hosts the search index, and where it is located.
After upgrading to Pega 7.1.7, the system administrator must manually migrate search functionality from Lucene Search to Elasticsearch. Note that during the switch-over and until the indexes are rebuilt, Lucene search continues to function and there is no interruption in search functions. For more information, see the Pega 7.1.7 Upgrade Guide.
Use JDBC 4 compliant drivers for better performance
Valid from Pega Version 7.1.7
For better performance, ensure that you are using JDBC 4-compliant drivers. For more information on supported and non-supported JDBC drivers, please reference the Platform Support Guide.
Use Tomcat 7 for better performance
Valid from Pega Version 7.1.7
For better performance with a Tomcat web server, use Tomcat 7.
Tomcat 6 has a limitation that causes the server to treat the JDBC driver as if it were a JDBC 3-compliant driver, even if the system is using a JDBC 4-compliant driver. Customers using Tomcat will see better performance if they upgrade to Tomcat 7 and use a JDBC 4-compliant driver.
Engine will not start if the incorrect JDBC driver is used
Valid from Pega Version 7.1.7
The engine will not start up if the incorrect JDBC driver is used. The following configurations are unsupported:
- Using a Multi-tenant Oracle system with one of the Oracle JDBC drivers with issues (see the chart in the Platform Support Guide)
- Using a Multi-tenant system with a JDBC 3 compliant driver, OR with Tomcat 6 (for more information on using tomcat with Pega 7.1.7, see Use Tomcat 7 for best performance)
- Using Microsoft SQL Server with a JDBC 3 compliant driver, OR with Tomcat 6 (for more information on using tomcat with Pega 7.1.7, see Use Tomcat 7 for best performance)
When any of these unsupported configurations are encountered, Pega 7 will not start. Before this change, the engine would appear to start up properly, but would encounter issues during other parts of the engine startup or during actual use of the system.
Need to run script before updating Multitenant systems
Valid from Pega Version 7.1.5
When updating or upgrading a Multitenant system from Pega 7.1.5 or 7.1.6 to Pega 7.1.7, if that system uses either an Oracle or a PostgreSQL database, you may encounter the error:
“Table must be empty to add column.”
The Multitenant architecture requires an additional column on a number of the PRPC database tables (“pzTenantID”). In Pega 7.1.7, two additional PRPC tables were tenant-qualified: pc_schedule_task and pr_index_schedule_task. The Multitenant column is added to these tables by the update/upgrade process. However, Oracle and PostgreSQL do not allow the addition of a non-null column to an existing table unless the table is empty, so updating or upgrading systems on those databases displays the error detailed above.
To avoid this error, before beginning the update or upgrade, it is necessary to run a script:
- Oracle —
OracleMTupgrade.sql - PostgreSQL —
PostgresMTupgrade.sql
For updates, these scripts are located in the /scripts/ddl directory.
For upgrades, these scripts are located in the /Resourcekit/AdditionalUpgradeScripts directory.
View agent activity and status more efficiently
Valid from Pega Version 7.1.7
The menu has been updated with several additional tabs detailing system information pertinent to an active server node running on a system, along with its requestors, log utilities, and purge/archive utilities. The link to the System Management Application tool has also been moved to the menu in this release.
Previously, to understand your system, you had to access every node on your system individually. With this update, the information available on these tabs allows you to view all agents across a cluster to determine if an agent is active and in-depth details about the agent in a more efficient manner.
The System: Operations page displays agent information and status on a system
Access this menu by selecting . For more information, see the System Operations landing page.
Changes to default Agent settings
Valid from Pega Version 7.1.7
Default agent settings across several rulesets have been updated in this release. Changes to settings include agents that are now:
- Disabled by default
- Scheduled to run at a recurring designated time interval (in seconds)
- Scheduled to run daily at a specified time
An example of some updated default agent settings. Compared to earlier versions, you can see in Pega 7.1.7 that ProcessCaseTypeCalculations and ProcessFlowDependencies are now set to run every 60 seconds, and that ProcessEmailRequest is disabled.
This update allows operations staff to understand the general purpose of an agent by product, and enhances usability of this information by improving navigation of agents in large systems through filtering and sorting.
For more information, see Changes to default agent settings in Pega 7.1.7.
Application Validation boosts productivity without ruleset prerequisites
Valid from Pega Version 7.1.7
By default, Application Express leverages the new Application-Based Validation (ABV) mode for a more flexible development experience without having to use ruleset prerequisites as is required with Ruleset Prerequisite-Based Validation (RSP) mode, which remains available and supported.
With RSP mode, a list of prerequisites might differ from your runtime list, which could lead to behavior differences between validation and runtime. This prerequisites list was hard to maintain and could change unintentionally, often leading to unpredictable results. With the addition of ABV rulesets, however, you now have the ability to reference all rules in rulesets defined in the same application and rulesets belonging to any built-on application.
In this example of an ABV ruleset, each shaded or unshaded cell represents an application, and each name represents a ruleset. With ABV, you have the ability to call rules both above and below the designated ruleset.
Select Application Validation mode to validate rules without having to specify prerequisites.
By default, the generated framework and implementation rulesets use Application Validation instead of explicit ruleset prerequisites.
For details on how ABV determines which rules are valid to reference at design time, see Understanding Application-Based Validation mode.
Check validity of rules in application with Validation tool
Valid from Pega Version 7.1.7
When you update your application definition, there are certain changes that can invalidate some of your rules. Use the new Validation tool regularly to ensure that all rules referenced in an application have valid rule references based on the application context.
This simple tool can quickly help you improve the quality of your application and should be used regularly. For example, if you delete or change the return type of a rule, by running the Validation tool, you will know how many rules became invalid by that change.
When you run the Validation tool from the Designer Studio menu, a progress bar indicates your progress.
For more information about when to run the Validation tool and how this solution can confirm that rules pass current validation requirements, see About the Validation tool.