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List:       openldap-technical
Subject:    Re: LDAP VLV throws error "Other sort requests already in progress"
From:       Howard Chu <hyc () symas ! com>
Date:       2022-11-28 16:43:58
Message-ID: b7e5b436-fa93-50b6-a4a4-72c3aad6f0ec () symas ! com
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rathore_pushpendra21@yahoo.co.in wrote:
> The bounty expires in 7 days. Answers to this question are eligible for a +200 \
> reputation bounty. NG. wants to draw more attention to this question. I am trying \
> to implement pagination in LDAP using vlv, using reference from document \
> https://docs.ldap.com/ldap-sdk/docs/javadoc/com/unboundid/ldap/sdk/controls/VirtualListViewRequestControl.html
>  
> it is working fine with single thread, but when try with multiple threads \
> concurrently upto 5 threads it works fine, but as number of threads increased only \
> 5 threads can run successfully exceed threads got failed with below error message: 
> LDAPException(resultCode=51 (busy), numEntries=0, numReferences=0, \
> diagnostiMessage='Other sort requests already in progress', ldapSDKVersion=5.1.1.. 
> I am using OpenLDAP, Unboundid api for connection with Java. About data size it is \
> around 100k.> Tried with single connection and multiple connections(with multiple \
> concurrent threads) getting same error in both cases. Tried to synchronize block \
> for fetching data. On exception, make thread to wait and try again. All above \
> things didn't worked, threads cannot fetch data from LDAP. After trying to close \
> and reconnect connection as described in \
> https://www.openldap.org/lists/openldap-technical/201107/msg00006.html failed \
> thread can fetch data but after retry lot of times, in my case thread retried about \
> 2k times then it started fetching data. Is there any better solution, retrying 2k \
> times and getting result is not a good option. 
Read the slapo-sssvlv(5) manpage.

-- 
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/


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