Rajini Sivaram created DIRSERVER-2257:
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Summary: Missing entry due to timing issue with persistent LDAP
search
Key: DIRSERVER-2257
URL: https://issues.apache.org/jira/browse/DIRSERVER-2257
Project: Directory ApacheDS
Issue Type: Bug
Components: ldap
Affects Versions: 2.0.0.AM25
Reporter: Rajini Sivaram
LDAP search using {{PersistentSearchControl}} with {{changesOnly=false}} must
return all existing entries followed by any changes so that the client sees all
entries (https://tools.ietf.org/html/draft-ietf-ldapext-psearch-03). The
current implementation processes all existing entries and then sets up a
listener to process entry changes. This leaves a small timing window where
entries created while the existing entries are being processed, but before the
persistent listener is created are never returned to the client. We see
intermittent test failures as a result of this timing window in tests which
start a persistent search and create entries immediately after that.
The relevant code is here:
https://github.com/apache/directory-server/blob/master/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/request/SearchRequestHandler.java#L141
It is hard to add a workaround for persistent search if all entries are not
guaranteed to be returned.
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