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Pega Platform Resolved Issues for 8.1 and newer are now available on the Support Center.

INC-177877 · Issue 661177

Write lock check added to avoid thread contention

Resolved in Pega Version 8.6.2

After updating the Pega platform and NBA Designer, a significant drop in performance for multilevel strategies was observed. Investigation showed that invoking a sub strategy containing external input intermittently caused a thread contention issue related to write lock. This was traced to overzealous write locking of a component where only a read lock for the thread was required, and has been resolved by adding a verification check to determine whether a write lock is necessary for a given operation before acquiring it.

INC-178214 · Issue 664889

D_ProjectList updated to resolve defined databases error

Resolved in Pega Version 8.6.2

After update, an API error for D_ProjectList indicating "No databases defined" was seen when trying to load decision and templates for the first time. The error did not reoccur after the initial save. This was has been resolved by updating the handling for loading the properties file during class loading. The error has also been changed to an exception.

INC-178938 · Issue 661496

Exception handling added for ClipboardPropertyCollection

Resolved in Pega Version 8.6.2

After upgrading from Pega v7.3 to 8.5, validating the existing strategy logic generated the error "ClipboardPropertyCollection is not a supported ILType". This was traced to the special Pega expression type PropertyCollection not being supported by IL, and has been resolved by adding logic that will throw a more appropriate exception (instead of the generic PRRuntimeException) so the event can be caught by the existing fallback logic.

INC-181401 · Issue 665935

Added handling for MS SQL datestamp format

Resolved in Pega Version 8.6.2

When using an Microsoft SQL Server, the browse operation was failing with an SQL error for the pyIHSummary dataset. Investigation showed there were some datasets that generated SQL statements with a date timestamp format that SQL was not able to handle implicitly, affecting browsing but not functionality. This has been resolved.

INC-182137 · Issue 662487

Multistage Prediction Logic improved

Resolved in Pega Version 8.6.2

When Predictions with Response wait time configured were executed as part of make decision, each decision that came out of the strategy caused a pxDR call to fetch the relevant model execution results and process them to stage the default outcome results for models. This has been improved by modifying the system to process the existing records rather than reading data again from pxDR.

INC-183431 · Issue 665161

Strategy execution queries tuned

Resolved in Pega Version 8.6.2

During NBA strategy execution, interaction history summaries were queried multiple times for a single strategy execution. To improve this function, the isChanged query will now be executed once after system startup if there are no changes instead of being executed every time the Aggregates DataSet BBK is executed. If the same Aggregates query is made multiple times as part of a Strategy in a REST request (i.e. likely multiple ADM models in a MakeDecision call), only one Aggregates BBK call will be made.

INC-185045 · Issue 672418

Performance improvements for action check-in

Resolved in Pega Version 8.6.2

The process of 'Saving As' an action to a higher ruleset, Saving, and then running Check-in was taking an excessive amount of time. This was traced to redundant page copy activities and performance has been improved by updating the implementation.

INC-186889 · Issue 674015

Unused DSS compiledExpressions now defaults to false

Resolved in Pega Version 8.6.2

After updating from Pega 8.2 to Pega 8.5, executing a test campaign failed with an error in logs. This occurred when running Distribution tests with "Include funnel analysis reports" checked, and was traced to the DSS setting "decision/strategy/ssaVM/compiledExpressions". As this was previously used to toggle a feature which is no longer in use, the default setting for this DSS has now been changed to false to resolve this issue.

INC-188389 · Issue 672761

ComponentName fallback added for toggling page context

Resolved in Pega Version 8.6.2

Whenever the External Strategy configuration was changed from "Another Page" to "Current Page", pyComponentName property was not being created. This was a missed use case for toggling page context for external substrategies in the user interface of the strategy designer, and has been resolved by setting pyComponentName to its default if reset when switching context.

INC-188419 · Issue 671500

DSS added to configure usage of Topup

Resolved in Pega Version 8.6.2

During NBAD-generated strategy execution, each interaction history summary is queried twice to check data relevancy. This update adds configuration options to disable topup in aggregate datasets. Topup can be disabled with the following configuration items:- Set prconfig "ih/aggregates/last_customer_update_method" to NONE - Set DSS "cep/aggregates_dataset/partition_proc_cache_time" to -1

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