INC-161984 · Issue 638856
Web Tier busy threads released on timeout
Resolved in Pega Version 8.6.1
Tomcat Web Tier Busy Threads were not being correctly released, causing stability and performance problems that included health check pings not receiving a thread to service the request so the node was marked as bad, users were quiesced, and the node replaced. Investigation showed the 'put' on the blocking queue did not time out when the queue was full and waited indefinitely, keeping the thread blocked. To resolve this, the system will use 'offer' on the blocking queue instead of 'put' to force thread release on timeout. In addition, debug logs have been added to understand when the offer (or Put) does not succeed and the state of the queue that is causing this issue; the debug logs for class com.pega.pegarules.session.internal.serverpush.RoboticAutomationImpl should be enabled only if the thread busy issue is observed and for limited time window while actively debugging.
INC-164794 · Issue 637991
Apache Commons libraries updated
Resolved in Pega Version 8.6.1
Apache commons-codec has been updated to version 1.15 , and Apache commons-io has been updated to version 2.7.
INC-171587 · Issue 652191
Resolved Push Node Daily Information exception
Resolved in Pega Version 8.6.1
The "Push Nodes Info Daily" agent was generating an exception on each of the nodes. This has been resolved by enhancing the PegaAESRemote code to handle the exception and get the node info locally, then push it to the console when it is not able to get it via the cluster management API.
INC-173162 · Issue 650793
Certificate match will use Subject Distinguished Name
Resolved in Pega Version 8.6.1
Signature verification was failing due to the system not finding the matching root certificate for the chain. The root certificate was in the trust store, but the system found a different certificate first and that other certificate (an intermediate certificate) was not considered a valid certificate for validating the whole certificate chain. This was traced to filtering on the Issuer Distinguished Name (DN) instead of the Subject DN and was due to intermediate certificates potentially having the same Issuer as a root certificate (e.g. if that root certificate was used to create the intermediate certificate). To resolve this, an update has been made to check the Subject DN instead of Issuer DN.
INC-174298 · Issue 650257
Instance count logic updated
Resolved in Pega Version 8.6.1
A performance issue was seen during update that resembled an upgrade hang. This was caused by a combination of incorrect logic in DDLGenerator.getInstanceCountForClass() around counting instances of 'core' classes and all of the site history-data- tables being mapped to the same table that had 1.4+ billion rows. This behavior has been addressed with more correct query logic while performing instance counts. In addition, instance count will be supressed during command line invocations (prpcUtils, platform upgrade).
INC-180479 · Issue 659640
DSS partition count setting made backward compatible
Resolved in Pega Version 8.6.1
After update, the DSS to limit the number of partition counted was no longer working and instead used the default value of 20. This has been corrected and made backwards compatible.
INC-145293 · Issue 610933
Additional diagnostic logging added for ElasticSearch startup issues
Resolved in Pega Version 8.6.3
The PyIndexerState was stuck in Starting status during node initialization. This issue could occur if the filesystem became hung due to network level issue while scanning entries from /etc/mtab, resulting in a lock which was not released correctly. In order to better determine which node entry in a cluster may be responsible for the hang, an update has been made which will use a temporary virtual environment to repeat the part of the initialization phase responsible and generate additional logs for debugging. To activate this, the PegaSearch.Diagnostics logger must be set in DEBUG mode. This duplicated virtual initialization will not interrupt the normal initialization.
INC-153849 · Issue 641923
Updated replica management for search clusters
Resolved in Pega Version 8.6.3
When using a cluster with two Universal nodes in the cluster, a daily restart process where the second node was not started until the first was fully up resulted in Search initialization failing for the first node while becoming active on the second node. This was traced to the methods used in increasing and decreasing replicas. This has been resolved by revising the handling of ElasticSearch node lifecycle and replicas through a new option "Dindex.searchNodeCount " which includes a specification for the number of expected search nodes. If this option is not present, the old method will be used.
INC-168003 · Issue 655376
BIX Total Instance count matches manifest
Resolved in Pega Version 8.6.3
The BIX Manifest file was showing a count mismatch when the BIX Manifest and Extract files were shared with downstream teams, causing data to not be accepted by the downstream application. Investigation showed this occurred for an embedded page list property in the sequence that was missed and not considered. To resolve this, a DSS has been added: when BIX/generateAllEmptySubscriptForPageList is set to true, an empty subscript will be generated for the missed properties.
INC-178002 · Issue 663769
Restore point handling updated for absent pzpvstream column
Resolved in Pega Version 8.6.3
While executing the “get restore point” action for rollback, a PZPVSTREAMerror error occurred with the message "(util.HistoryCollectorDataModel) WARN|Rest|SystemManagement|v2|restorepoint - History collection for the table will be slow because it does not have all of the required columns". This was a missed use case for Robotics Automation not having a pzpvstream column for one of the tables; this has been corrected with a check to validate for pzpvstream column so the system will not seek history records if the pzpvstream column is not present.