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(ITS#4758) valsort + dynlist can cause 100% cpu utilization causing slapd to become unresponsive

Full_Name: Michael Heep
Version: 2.3.30
OS: Linux (RHES30)
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (


the following valsort + dynlist combination causes slapd to utilize 100% cpu
time when issueing searches against parts of the DIT containing attribute-value
pairs "created" by dynlist:

overlay dynlist 
dynlist-attrset                extensibleObject memberURL uniqueMember 

overlay valsort 
valsort-attr uniqueMember dc=o2online,dc=de alpha-ascend

When run independent both overlays work flawlessly.