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INC-126129 · Issue 569666

PropertyToColumnMap made more robust

Resolved in Pega Version 8.1.9

The DF_ProcessEmails dataflow was intermittently failing with a StageException error. This was traced to schema changes being propagated asynchronously by system pulse, which seem to have caused PropertyToColumnMap to cache stale schema. To resolve this, if the property mapping is not found the first time, the system will make a second attempt to get the mapping. Additional logging has also been added for better diagnostics.

INC-128385 · Issue 564521

Behavior made consistent between SSA and legacy engines

Resolved in Pega Version 8.1.9

There was a behavioral disparity between the legacy execution engine and the SSA engine where the latter was not creating a new page when the index was one above the size of the page list. This has now been corrected in order to make the SSA behavior fully backward compatible with the legacy engine, i.e. a new blank page will be added to the list if the index is one above the size of the list.

INC-129222 · Issue 568530

Handling improvements for commit logs

Resolved in Pega Version 8.1.9

The ADM commit log logs the number of unconsumed messages that are going to expire. In certain circumstances, it can include unconsumed messages that are not going to expire in the count. Because they are not expired and removed, the environment was running out of disk space due to the ADM commitlogs table growing larger than expected and performance issues were seen. To resolve this, a new adm_commitlog.adm_responses_commit_log_date_tiered table has been created, with a default_time_to_live of 24 hours. DateTieredCompactionStrategy has been set with max_window_size_seconds as 24hrs and tombstone_compaction_interval as 24hrs.

INC-132976 · Issue 580685

Performance improvements for Test Strategy data flow

Resolved in Pega Version 8.1.9

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.

INC-138037 · Issue 586593

Strategy handling updated for very large systems using IH summary

Resolved in Pega Version 8.1.9

When a Strategy in a Real-time dataflow used IH Summary on a system with more than 5000 groups for one eventKey, the message "Error retrieving aggregates from Cassandra KVS" intermittently appeared. Investigation showed that if the number of result rows was greater than the FETCH_SIZE (set to 5000), it meant another read to Cassandra was required and an exception was generated. To resolve this, updates have been made so that instead of returning maps, the system will return iterators and change them to map on the calling thread.

SR-D92734 · Issue 553412

Simulation can take Data flow type as destination

Resolved in Pega Version 8.1.9

Support has been added for Data flow functionality as simulation target and data transform in simulation input.

INC-126129 · Issue 569667

PropertyToColumnMap made more robust

Resolved in Pega Version 8.2.8

The DF_ProcessEmails dataflow was intermittently failing with a StageException error. This was traced to schema changes being propagated asynchronously by system pulse, which seem to have caused PropertyToColumnMap to cache stale schema. To resolve this, if the property mapping is not found the first time, the system will make a second attempt to get the mapping. Additional logging has also been added for better diagnostics.

INC-126319 · Issue 566343

Able to add offer to Change Request after deleting other offer from the landing page

Resolved in Pega Version 8.2.8

A Change Request creation was failing after deleting an offer rule from the revision management landing page. While deleting the offer rule, the activity pyDeleteRuleFromLP is called and pxDeleteRecord API is used to delete the rule. The pyWorkPage is being modified with class Work-ProjectManagement-CheckIn when the pxDeleteRecord activity is executed, but after this, the Change Request creation failed due to the wrong context of the pyWorkPage. This has been resolved by adding Page-New of pyWorkPage conditionally.

INC-126801 · Issue 576324

Improved cleanup for adm_response_meta_info

Resolved in Pega Version 8.2.8

The adm_commitlog.adm_response_meta_info column family was growing, leading to gradual increase in CPU utilization on the ADM nodes over time. Investigation showed that the compaction on the adm_response_meta_info table was not being triggered by the ADM service, and the compaction did not remove rows that belonged to models that had been deleted. To resolve this, compaction of the adm_response_meta_info table has been moved from the ADM client nodes to the ADM service nodes, which will correctly trigger the compaction on a predefined schedule. The compaction logic has also been refactored to remove rows that belong to models that have been deleted.

INC-128342 · Issue 594184

Improved cleanup for adm_response_meta_info

Resolved in Pega Version 8.2.8

The adm_commitlog.adm_response_meta_info column family was growing, leading to gradual increase in CPU utilization on the ADM nodes over time. Investigation showed that the compaction on the adm_response_meta_info table was not being triggered by the ADM service, and the compaction did not remove rows that belonged to models that had been deleted. To resolve this, compaction of the adm_response_meta_info table has been moved from the ADM client nodes to the ADM service nodes, which will correctly trigger the compaction on a predefined schedule. The compaction logic has also been refactored to remove rows that belong to models that have been deleted.

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