SR-D85558 · Issue 548287
Handling added for prolonged Heartbeat Update Queries
Resolved in Pega Version 8.4.1
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-D89012 · Issue 550801
DelegatedRules refresh icon made accessible
Resolved in Pega Version 8.4.1
When using Accessibility, the refresh icon in pzDelegatedRules was being read as "Link". This has been corrected by adding text for the refresh icon.
SR-D89428 · Issue 550393
Data Flow StartTime uses locale timezone
Resolved in Pega Version 8.4.1
The start time of the dataflow was displayed in GMT instead of the operator locale timezone. This has been corrected.
SR-D89643 · Issue 548293
Old Tumbling Time data in event strategies given TTL for cleanup
Resolved in Pega Version 8.4.1
Old Tumbling Time data keys in event strategies were not being cleaned up, causing Cassandra timeouts after the dataflow run had been running for several months. The longer the dataflow was running using standard compaction, the more the data was potentially spread out across SSTables and the slower it became. This has been resolved by adding a 'time to live' value for tumbling time windows, and event strategies has been switched to use leveled compaction by default.