INC-134097 · Issue 574512
Service Registry heartbeat updates
Resolved in Pega Version 8.4.2
If a service (node) did not update its heartbeat for more than 90 seconds, eventually these stale services were removed from the database because the service registry did not consider them present. To resolve this, topology listeners will now use a java thread pool to run their logic and no longer use the heartbeat thread. Even if these listeners are slow, it won't affect the heartbeat and won't cause nodes to become unhealthy. If for some reason the heartbeat becomes slow (due to database issues) it will issue a thread dump to help identify what causes the slowness and aid in troubleshooting.
SR-D75583 · Issue 547301
JMX access enhancement
Resolved in Pega Version 8.4.2
An enhancement has been added to JMX access that provides two new prconfigs, "dnode/cassandra_jmx_username" and "dnode/cassandra_jmx_password". These allow adding credential requirements to local JMX.
SR-D81328 · Issue 542960
Kafka Disk Space auto cleanup improvements
Resolved in Pega Version 8.4.2
High disk space consumption was seen when using a custom QueueProcessor and standard retention policies. To resolve this, an enhancement has been added which will allow consumed QueueProcessor messages to be removed from the stream as soon as they are processed to avoid out of space issues. This will ignore partitions with undefined positions.
SR-D86469 · Issue 551897
Performance improvements for Test Strategy data flow
Resolved in Pega Version 8.4.2
In the Test Strategy panel under Single case -> "Settings", selecting the "Data flow" option and choosing CustomerData dataflow was taking an excessive amount of time to run on a system with an extremely large database. To improve performance, two areas have been addressed: 1) the default behavior for record key suggestions in the test panel has been modified to collect only the ID as the additional data is not necessary at that time; 2) a DSS has been added that will opt out of reading and collecting the customer IDs in order to minimize data stored on the clipboard.
SR-D87709 · Issue 552400
Default context check added for saving adaptive model with locked rulesets
Resolved in Pega Version 8.4.2
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-D90367 · Issue 556688
Cleanup enhanced for long pyEditElement names
Resolved in Pega Version 8.4.2
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-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-D91767 · Issue 559626
VBD planner supports URL encryption
Resolved in Pega Version 8.4.2
When using the VBD planner chart, using configure->Decision->monitoring->Visual Business Director-Datasource and then clicking on actuals generated a popup that did not have any values, and the chart was not loaded. Investigation showed that when the DSS prconfig/initialization/urlencryption/default was set to true, the Pega UI flags for encryption were not visible to code being executed by the VBD planner, resulting in the URLs not getting encrypted. To resolve this, an update has been made to set bEncryptURLs & pega.ctx.bEncryptURLs to true in VBD planner, if URL encryption is enabled.
SR-D93777 · Issue 565693
Handling added for Oracle Aggregate IH Summaries
Resolved in Pega Version 8.4.2
When using using (Non Materialized) IH Summaries to aggregate IH data, the data returned by the IH summary did not include all the expected records. If the same criteria was executed on the database via SQL or by using a strategy to process raw IH data then the results were as expected. This was due to a difference in handling of Oracle vs postgres which causes an order by clause not to be generated in the query: the postgres column name is lower case, while in Oracle it is upper case. This has been resolved by updating the system to get the column name correctly from the propertytocolumn map so IH records are returned in correct order by Browse By Keys operation.
SR-D94409 · Issue 553304
Strategy Explain message includes Component ID
Resolved in Pega Version 8.4.2
The Component ID has been restored to the Explain mode message for strategy results.