SR-D90779 · Issue 556916
Resolved error when using IHSummary as a predictor
Resolved in Pega Version 8.4.2
After configuring the adaptive model and implementing delayed learning with IHSummary as a predictor, the exception "dataflow.StageException" appeared when the strategy was executed as part of the dataflow run. This has been resolved by implementing a cache expiry of 5 minutes.
SR-D74247 · Issue 542915
Resolved errors when using Build Model from the Preview Console
Resolved in Pega Version 8.3.2
Using the Web Chatbot interface and trying to perform Build Model action from Preview Console failed with multiple errors, either "This action is not allowed as it is outside the current transaction" or "class <blank> doesn't exist". This was traced to issues with the transaction during model update, and has been resolved by conditionally disabling the show page step of pzGetModelProcessStatus. This step creates a difference in the context of the current transaction and is disabled when called from Update API.
SR-D96836 · Issue 555750
Refinements made to MarkerNode memory use
Resolved in Pega Version 8.4.2
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.
SR-D39972 · Issue 513459
UpgradeOnOpen updated to use property set
Resolved in Pega Version 8.3.2
After upgrade, using the revalidate & save wizard on MapValue rules (Rule-Obj-MapValue) generated null pointer exceptions in the tracer file and rules failed with bad status. This was traced to changes made in the Java step of UpgradeOnOpen that used the getReference() method, and has been resolved by updating the UpgradeOnOpen activity in the Rule-obj-Mapvalue class to use property set.
INC-195387 · Issue 681673
HandleResponses updated for use with optimized campaign
Resolved in Pega Version 8.7
After updating from Pega 8.4, responses were not processed in the pxHandleResponses Data flow if the "pyCampaignOptimization" flag was set to true. This was traced to a missed use case for an optimized campaign, and has been resolved by modifying the condition in HandleResponses.
INC-131260 · Issue 571786
Handling added for runs using Completed state
Resolved in Pega Version 8.4.2
After upgrade, creating a data flow rule and the batch Data flow run using the Dataflow-Execute method in the activity resulted in the exception "Could not start run DataFlowRunConfig" when executing. This was a missed use case in the new architecture of data flow engine introduced in 8.4, causing DataFlow-Execute to not work properly for existing runs in COMPLETED state. This has been resolved with the addition of a branch of execution in DataFlow-Execute.Start to correctly handle completed runs.
SR-D42451 · Issue 518066
ExecuteRDB call updated to use NativeSQL for blob
Resolved in Pega Version 8.3.2
After creating a test activity to clear data set records that used the DataSet-Execute method and passed the data set name and truncate operation, only 51 records were deleted in a single run when the data set had more than 51 records. Investigation showed that for blob tables, the database truncate operation was using executeRDB with an empty results page, i.e. it didn't specify pyMaxRecords, which on some databases might have limited the number affected records. To resolve this, the executeRDB call in the database truncate operation has been modified to use NativeSQL for blob tables.
INC-197530 · Issue 686027
Value Finder updated for use with external Cassandra nodes
Resolved in Pega Version 8.7
Attempting to use the Value Finder feature resulted in the error "Running Simulation is not possible because the required services are not available. Contact your System Administrator to enable the data flow and decisioning data store services." Analysis traced this to a check which identifies whether there is more than one internal node available for CDH/ DSS node. Since there were only external nodes available in this scenario and no internal nodes, the method returned false and returned the error when the CDH / VF page was launched. To resolve this, the check has been modified to allow for external Cassandra.
INC-174933 · Issue 651829
Special characters escaped for use in "is in List" lookups
Resolved in Pega Version 8.7
After creating a specific criterion on any proposition using a string property, the "Is In List" operator, and a customer list with one value containing a "$", clicking save or check in resulted in the exception error "Problem invoking function: pega_decisionengine_propositionfilterfua.pzPropositionFilterMethodBody--(PublicAPI,ClipboardPage) java.lang.IllegalArgumentException: Illegal group reference at java.util.regex.Matcher.appendReplacement(Matcher.java:857) ". This has been resolved by escaping regular expression control characters in string replacement, which will allow the use of characters such as the $ sign for "is in List" lookups.
SR-D37945 · Issue 506799
Server node cache refresh will use remote execution timeout
Resolved in Pega Version 8.2.4
A campaign was failing due to VBD remote ping timeout with a stacktrace that indicated a StageException. Investigation showed that when the cluster is heavily loaded, calls to the remote execution API could time out. If this occurred when the VBD client was refreshing its cache of VBD server nodes, then the insert failed and the error was propagated up the calling data flow. To resolve this, the system will use the remote execution timeout when refreshing node cache, extend the timeout to 60 seconds, and ensure timeouts are retried during inserts.