SR-D82727 · Issue 547725
Improved management for table pr_log_dataflow_events
Resolved in Pega Version 8.4.1
The Lifecycle event table was sometimes growing too large. This additional strain of database transaction volume caused poor performance on the Dataflow tier and lead to cluster instability and time-consuming cluster restarts. Due to problems in one of the Pulse tasks, the Pulse thread was not processing single case metrics properly and causing the unbounded queue for single case to grow. This has been addressed by switching to a fixed queue size, which is configurable with the DSS: dnode/single_case_queue_size. The default value of the DSS is 4000, and if changed a system restart is required. An error will be logged each 1000 queue misses, and metrics will be dropped if the queue is full. In addition, the Pulse task frequency has been improved and managed to prevent interference with other Pulse tasks and will be triggered only if a run is system-paused for a long interval. Rebalances now have a failsafe if something unexpected happens during the Pausing of the run, and If the cluster becomes unstable, the life cycle events logs may be disabled with dataflow/run/events/persist .
SR-D85095 · Issue 546342
Updated COUNT logic for strategies with ssavm set to true
Resolved in Pega Version 8.4.1
An error was seen when attempting to save a strategy after setting ssavm to true, indicating an issue in the “COUNT” method in Group By shape. Since the source field is not used and does not need to be evaluated here, the system has been updated to ignore the source field if the operation is COUNT.
SR-D85558 · Issue 548287
Handling added for prolonged Heartbeat Update Queries
Resolved in Pega Version 8.4.1
After restart, the pyFTSIncrementalIndexer queue size had hundreds of thousands of entries even though it was empty prior to the restart.Investigation traced this to a job scheduler that checked all the database connections everyday at 1 EST by using a list that contained some connections which did not exist. Checking those invalid connections caused other update queries to queue and wait, resulting in the update heartbeat query taking longer than its default beat. This caused a Split Brain issue wherein other nodes considered the long-executing node to be dead and triggered a rebalance while the node itself continued to execute partitions thinking that it was healthy. This caused duplicate processing of records. To resolve this, a fail safe has been added: while updating heartbeat in Service Registry, nodes will enter safe mode when the update query is taking longer than the default beat.
SR-D89012 · Issue 550801
DelegatedRules refresh icon made accessible
Resolved in Pega Version 8.4.1
When using Accessibility, the refresh icon in pzDelegatedRules was being read as "Link". This has been corrected by adding text for the refresh icon.
SR-D89428 · Issue 550393
Data Flow StartTime uses locale timezone
Resolved in Pega Version 8.4.1
The start time of the dataflow was displayed in GMT instead of the operator locale timezone. This has been corrected.
SR-D89643 · Issue 548293
Old Tumbling Time data in event strategies given TTL for cleanup
Resolved in Pega Version 8.4.1
Old Tumbling Time data keys in event strategies were not being cleaned up, causing Cassandra timeouts after the dataflow run had been running for several months. The longer the dataflow was running using standard compaction, the more the data was potentially spread out across SSTables and the slower it became. This has been resolved by adding a 'time to live' value for tumbling time windows, and event strategies has been switched to use leveled compaction by default.
SR-D67316 · Issue 541206
Cross-site Scripting protection for PegaRULESMove_Skimming_Query
Resolved in Pega Version 8.4.1
Cross-site Scripting protection has been added for input parameter toRSV of the activity PegaRULESMove_Skimming_Query.
SR-D78467 · Issue 542319
Component rule check added to suppress unnecessary guardrail warnings
Resolved in Pega Version 8.4.1
After creating a component application using Configure > Application > Components, guardrail warnings were seen when saving the component. The component application allowed adding rulesets or other applications, but did not have all the tabs found in a normal application, so there was no option for adding the associated classes to define the UI class, Integration class and data class in the component application. As component is mostly a part of (or embedded inside) an application, this function was not given options to justify or suppress guardrail warnings like Rule-Application. To resolve this, a check has been added for component rule before generating guardrail warnings for Empty UI page, Empty Integration class, and Empty Data class.
SR-D79397 · Issue 546417
Rule-Utility-Function references updated with library information
Resolved in Pega Version 8.4.1
The "changeSystemName” operation failed. This was traced to the function “getLocalizedValue” (Rule-Utility-Function) being saved into the PegaFS library due to runtime resolution based on the function signature even though the actual Rule-Utility-Function from “Pega-Rules” ruleset needed to be picked in this case. To ensure the correct ruleset is picked, Rule-Utility-Function references have been updated with library information to resolve the resolution collision scenario.
SR-D80539 · Issue 544795
Testcases are not available for 'access when' rules
Resolved in Pega Version 8.4.1
Attempting to create test cases for access when rules resulted in guardrail warnings about the need to create a test case. Because Test Cases are not available for the Access When rule type as per Pega expected behavior, the guardrail warnings are not valid and have been removed.