SR-D37945 · Issue 506798
Server node cache refresh will use remote execution timeout
Resolved in Pega Version 8.3.1
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.
SR-D38415 · Issue 507994
Resolved Transfer to Queue duplicate assignments
Resolved in Pega Version 8.3.1
The Transfer to a Queue option was creating duplicate assignments after accepting the Chat. Once the chat was accepted, an instance was created\maintained in both Assign-Workbasket and Assign-Worklist tables. This happened after adding the "Transfers" queue to an Agent; if that queue was not added, the transfer to a queue option gave an error to the Agent receiving\accepting the chat. The Work-.ReassignDefaults activity is an extension that was customized in the Pega-DecisionManager ruleset for a certain use case in revision management. The customization is no longer required and has become redundant and has therefore been removed to resolve this issue.
SR-D43470 · Issue 511439
Adjusted generated file cleanup to resolve class not found issues
Resolved in Pega Version 8.3.1
After upgrade, attempting to run a new multi-channel campaign failed with an error citing "java.lang.NoClassDefFoundError: com/pegarules/generated/testgen/Rule_Decision_DDF_Data_Decision_Request_Customer_DF_ProcessOffer_Action". This was traced to a temporary directory with generated java files that was cleaned up before the restart, leading to the .Class file for the DF_ProcessOffer not being present when needed. This has been resolved by adjusting the cleanup of the files so they are not removed too early.
SR-D44159 · Issue 512447
Refined Change Request creation logic
Resolved in Pega Version 8.3.1
Once a Change Request was terminated/closed with the X button available on the UI, the Change Request was created but could not be opened from the Report Manager landing page. Investigation showed that a change request created from the new revision button or create change request in the refine selection screen did not yet have pyLabel available in the CR because the assignment would not be submitted at this stage (Refine selection screen). Once the assignment was submitted, the pyLabel value would be committed to the database and be available in the change request. To resolve this, the CR creation rules have been modified and will set the pylabel value.
SR-D41616 · Issue 509808
Corrected Cassandra startup error related to client authentication
Resolved in Pega Version 8.3.1
During provisioning, Cassandra nodes in PegaDDSTier failed to join the cluster and the error "Exception (org.apache.cassandra.exceptions.ConfigurationException) encountered during startup: Invalid yaml. Those properties [truststore_password, truststore] are not valid" was generated. Investigation showed that the recent addition of support for client authentication using the settings "dnode/cassandra_client_encryption/truststore" and "dnode/cassandra_client_encryption/truststore_password" resulted in nulls being set cassandra.yaml if the new parameters were not given values. To resolve this, truststore and truststore_password will not be added to cassandra.yaml when they are not set in prconfig or system settings.
SR-D90367 · Issue 556687
Cleanup enhanced for long pyEditElement names
Resolved in Pega Version 8.5
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-D71621 · Issue 533296
Real time processing picks up correct datetime for Capture Response records
Resolved in Pega Version 8.5
A Realtime Data flow for the Capture Response flow was configured with a strategy shape set to load previous decisions within the past 7 days. Once this Realtime DF was started, attempting to Capture Response for decisions made after that startup timepoint did not work. This was traced to the InteractionID being written with global properties for the datetimes, and has been resolved by making those datetime properties local so the start and end time are not cached and the time range is calculated based on "now”.
SR-D85558 · Issue 548286
Handling added for prolonged Heartbeat Update Queries
Resolved in Pega Version 8.5
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-D66397 · Issue 530333
ADM out-of-sync corrected for multi-datacenter Cassandra cluster
Resolved in Pega Version 8.5
After setting up the multi-datacenter configuration for a Cassandra cluster that consisted of six nodes in datacenter 1 and three nodes in datacenter 2, failover testing revealed a mismatch in the number of ADM models stored in each datacenter. The mismatch was observed mostly in the number of records present in the "adm_scoringmodel" and "adm_response_commit_log_date_tiered" tables. When Cassandra nodes are down, the other nodes in the cluster will store hints (records to be written) for the down nodes. When these nodes come back online the hints are replayed to those nodes and the data is written. Hints are written for 3 hours, so if a node come back up within 3 hours data is recovered and repairs are not required. The gc_grace_seconds for the above tables that were getting out of sync across the two datacenters was set to zero seconds. The "gc_grace_seconds" attribute is not just used as the time for removal of tombstones, it's also used to set the TTL for records written to the system.hints table. That meant that when the hints were written for the ADM tables for the nodes that were down, they were immediately expired since it was set to 0 and not played back when the terminated nodes restarted and joined the cluster. This has been resolved with this fix for all customers new to this release. Existing customers already on v7.3 or higher will need to complete the local change detailed below: Connect to the Cassandra cluster using cqlsh in the Pega Cassandra distribution and then run ALTER TABLE adm_commitlog.adm_response_commit_log_date_tiered WITH gc_grace_seconds = 86400; to change the relevant setting from zero to the equivalent of one day - the same length of time that the data in the table lives for. This will mean that any hints written can still be used to replay data to another node while the data itself is alive. It does also mean, however, that, given a constant load, a day's worth of expired ADM event data in the table will always be present on the disk, as the tombstones can now not be cleaned up for a day.
SR-D85095 · Issue 546341
Updated COUNT logic for strategies with ssavm set to true
Resolved in Pega Version 8.5
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.