SA-35382

Summary

After migrating rules to a new environment, errors occur when the rules are invoked after migration. The error vanishes after a cold restart with cache clear.

Error Messages

2017-03-17 10:12:37,811 [fault (self-tuning)'] [ STANDARD] [ ] [ RULESET:01.04.01] ( internal.mgmt.Executable) ERROR NODE.ADDRESS|127.0.0.1|Rest||||A78C65436A45B61D83792B1CBCD131D1C - Exception com.pega.pegarules.pub.PRRuntimeException: Interaction type RunInteraction failedSubscription'

Steps to Reproduce

Migrate rules from one environment to another and the error occurs intermittently.

Root Cause

A race condition can occur if the system pulse agent is not configured properly in some multi-node systems, causing the system pulse agent to not properly synchronize new rules across the nodes. If not addressed, a restart is required to synchronize rules when this occurs.

Resolution

This can be addressed by using the following system setting:
Create the following dynamic system setting:

Owning Ruleset: Pega-Engine
Setting: prconfig/systempulse/scanoffsetms/default
Recommended Value: 30000 (milliseconds)