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Interaction Work Objects cannot be opened



There is an error whenever an interaction work object is opened from the work list. A concurrent modification exception was observed in log during iteration.

at java.util.HashMap$AbstractMapIterator.checkConcurrentMod(
at java.util.HashMap$AbstractMapIterator.makeNext(
at java.util.HashMap$
at com.pegarules.generated.html_harness.ra_stream_cpmperform_99ff7548397ca808d2b589791e4a6745.include_1(
at com.pegarules.generated.html_harness.ra_stream_cpmperform_99ff7548397ca808d2b589791e4a6745.generatePegaHarnessDiv_18(
at com.pegarules.generated.html_harness.ra_stream_cpmperform_99ff7548397ca808d2b589791e4a6745.executeStream_3(
at com.pegarules.generated.html_harness.ra_stream_cpmperform_99ff7548397ca808d2b589791e4a6745.execute(
at com.pega.pegarules.session.internal.mgmt.Executable.getStream(
at com.pega.pegarules.session.internal.mgmt.Executable.getStream(
at com.pegarules.generated.activity.ra_action_show_harness_3a715fceb3725b54f857d8327a1c5bba.step6_circum0(

Error Messages

Error trying to process **Interaction**

Steps to Reproduce

Open an interaction work object from work list.

Root Cause

The root cause of this problem is a defect in Pegasystems’ code or rules.


Use a toArray instead of iterating directly. This avoids concurrent modification exception during iteration. Use toArray() API to create a copy, and then iterate on the array.

​Apply HFix-22897.

Published February 9, 2016 - Updated October 8, 2020

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