SR-D82727 · Issue 547723
Improved management for table pr_log_dataflow_events
Resolved in Pega Version 8.2.7
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 546339
Updated COUNT logic for strategies with ssavm set to true
Resolved in Pega Version 8.2.7
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-D87709 · Issue 552398
Default context check added for saving adaptive model with locked rulesets
Resolved in Pega Version 8.2.7
When updating an adaptive model rule in Prediction Studio, the error message "No unlocked Rulesets/Versions found that are valid for this record. Unlock at least one Ruleset/Version that can contain records of this type." appeared when clicking Save. This occurred when a branch was used in the default context of the Prediction Studio settings. Although there was a workaround to use Dev Studio to Save As the adaptive model rule to the required branch, this has been resolved by adding a check for default context and then saving the model there if it is mentioned.
SR-D89643 · Issue 548291
Old Tumbling Time data in event strategies given TTL for cleanup
Resolved in Pega Version 8.2.7
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-D90367 · Issue 556686
Cleanup enhanced for long pyEditElement names
Resolved in Pega Version 8.2.7
A pyEditElement error relating to decision data was seen multiple times in a stack trace. Research showed that while the utility worked as expected for decision data rules with names of less than 30 characters, the pyEditElement section was truncated the name for the decision data. This meant that decision data with the name SampleIssueandSampleGroupTwosalkdjkightntbmkblffvfvfv would be saved as SampleIssueandSampleGroupT for the pyEditElement section. Because of this, the utility failed the match and did not clean up the pyEditElement section. To resolve this, the cleanup utility has been updated to handle pyEditElement sections of decision data with longer names. Additional logging has also been added to improve debugging.
SR-D90579 · Issue 550769
Real Time data flow exception during shutdown corrected
Resolved in Pega Version 8.2.7
A Real Time DataFlow run was failing with a java.util.concurrent.RejectedExecutionException. This occurred when the node was shutting down while picking up a partition, and was due to the life cycle events not being able to update the partition status. To resolve this, a check has been added to prevent the exception form occurring by evaluating whether the Executor is shutdown while distributing messages.
SR-D96836 · Issue 555748
Refinements made to MarkerNode memory use
Resolved in Pega Version 8.2.7
Significant memory usage can be observed when data join in strategies are missing the join conditions. E.g., when the primary source in the strategy can have up to 300 or even more propositions, the join without the join condition would perform a cartesian product with possibly up to 400 or even more records returned. This may cause performance degradation. To guard against this, an update has been made that seeks to prevent repetitive markers being accumulated under a MarkerNode while trying not to rely on any implementation of equality and hashCode for individual marker implementations.
INC-167606 · Issue 665869
Updated ConfirmHarness handling for case type creation
Resolved in Pega Version 8.6.2
If a new case type was created with the initialization stage and there were no assignments in the case type, the /cases API did not return a NextPageID in response. This has been resolved by setting the pyConfirmHarness parameter before calling addworkobject.
INC-168368 · Issue 651079
Correct flow actions loaded in multi-thread portal refresh
Resolved in Pega Version 8.6.2
The member authentication screen was displaying an incorrect flow action on doing browser refresh after creating a new interaction. Refresh is a special case where the parameter retention is different across single-threaded & multi-threaded portals alongside the execution order of activities. In this case, this inconsistency occurred in a multi-threaded portal when newAssignPage had the information to load the proper assignment but the parameter indicated an old index. This has been resolved by adding 'when' conditions to to populate and pass the correct references and labels and to honor the Param.TaskIndex set and sent by UI activities so it's retained in case of multi-thread portals.
INC-171842 · Issue 664387
Visible element populated for field value controls
Resolved in Pega Version 8.6.2
When implementing a section which had several labels with visible when conditions, this is not reflected in the DX API Get Assignment View. This has been resolved by adding a visible element.