https://bugs.openldap.org/show_bug.cgi?id=9287

          Issue ID: 9287
           Summary: ldap_create cause 10s delay in some scenario
           Product: OpenLDAP
           Version: 2.4.44
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: ---
         Component: libraries
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

hi LDAP guys

there has some issue in our product when we integrate ipv6.

scenario:  ipv4 internal + ipv6 external 
         after ldap search finish, we need build ldap message by ldap_create
function. 
         some times the ldap_create message will cause 10s delay. 

for example: the ldap search has 4 ocs, and only the first oc's ldap_create
will cause 10s delay, the fellowing ocs is within 0.0001s. 
we just think it may because the mutext is global and locked by other thread. 

could you help on this ? 



LOGs: 

there has 10s delay, and only execute ldap_create between them. 

2020/07/08-16:32:11.942114-[INFO] 13 (DBL) [DBL_LlbSearchResponse:76]LLB
replied successfully with [4] entries
2020/07/08-16:32:11.942181- [INFO] 13 (DBL) [DBL_LlbSearchResponse:125]Entry
Buffer[0] :
l_entryBerBufferPtr="0x64820136xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
2020/07/08-16:32:21.957488 [INFO] 13 (DBL)
[DBL_LlbSearchResponse:138]Successfully created LDAP dummy handle

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