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Exception while processing the activity DeleteUnusedCSSFiles



Users have observed few exceptions in the PegaRULES log while processing Pega-RulesEngine DeleteUnusedCSSFiles.

Error Messages

java.lang.NumberFormatException: For input string: "nu"
 at sun.misc.FloatingDecimal.readJavaFormatString(
 at java.lang.Double.parseDouble(
 at com.pega.pegarules.priv.FUAUtil.parseInt(
 at com.pegarules.generated.activity.ra_action_pzaddruleevent_d738a39be17a8a41345265b09e0ca2a4.step4_circum0(
 at com.pegarules.generated.activity.ra_action_pzaddruleevent_d738a39be17a8a41345265b09e0ca2a4.perform(
 at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(
 at com.pegarules.generated.activity.ra_action_pzruledeletetrigger_b01b63c93555ac5be0b1f23d2b014bf7.step5_circum0(
 at com.pegarules.generated.activity.ra_action_pzruledeletetrigger_b01b63c93555ac5be0b1f23d2b014bf7.perform(
 at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(
 at com.pega.pegarules.exec.internal.declare.infengine.ChainingEngineUtilImpl.runActivity(
 at com.pega.pegarules.exec.internal.declare.infengine.TriggerImpl.evaluateNetworks(
 at com.pegarules.generated.activity.ra_action_pzdeleteorphancss_c11e4faf39a303917ce7e4bacbe720db.step4_circum0_Rule_File_Text(
 at com.pegarules.generated.activity.ra_action_pzdeleteorphancss_c11e4faf39a303917ce7e4bacbe720db.perform(
 at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(
 at com.pega.pegarules.session.internal.async.agent.QueueProcessor.runActivity(
 at com.pega.pegarules.session.internal.async.agent.QueueProcessor.execute(

Steps to Reproduce

Restart Agent Pega-RulesEngine DeleteUnusedCSSFiles 
Frequency of agent processing is once for a day (86400 seconds) which makes a call to an activity Rule-File-Text.pzDeleteOrphanCSS

Root Cause

User has installed HFix-8760 along with the dependent HFix-6646 (changes in the activity pzDeleteOrphanCSS). After installing HFix-8760, user should restart the server after clearing the cache tables, system cache (temp folder contents) and the browser cache.

In Tracer, it was evident that pzDeleteOrphanCSS activity from an older RuleSet was picked up by the Agent and not from the RuleSet version defined in the HFix-6646.


On clearing the cache and restarting the server, updates in the activity pzDeleteOrphanCSS introduced under HFix-6646 were picked up which has helped resolve the reported issue.

Suggest Edit

Published January 31, 2016 - Updated October 8, 2020

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