Hi Dave,

On 7/4/21 2:00 AM, David Filip wrote:
> Greetings,
> 
> I have noticed that when deleting entries too fast using Apache Directory 
> Studio Version: 2.0.0.v20210213-M16 (ApacheDS 2.0.0.AM26), I receive the 
> following error:
> 
> ERR_04169_RESPONSE_QUEUE_EMPTIED The response queue has been emptied, no 
> response was found
> 
> 
> 
> I am not sure if this is a Studio (frontend) or ApacheDS (backend) issue?

Can you please give detailed information about your environment?

Studio: Which operating system and which Java version do you use?

Server: Do you use the ApacheDS embedded in Studio? Otherwise which type
of directory server do you use?

> To Reproduce:
> 
> Load a large number (200) of entire into the directory via JNDI API.
> 
> After the load completes, select 8 - 10 entries at a time in Studio, hit the 
> [Delete] key, and confirm deleting those entries.
> 
> If done successively, without waiting a sufficient amount of time, will 
> generate the above error, and not all of the selected entries will have been 
> deleted (but usually one or a few have been deleted).  Hit F5 to refresh to 
> determine which entires still remain.
> 
> Expected Result:
> 
> All entires should be successfully deleted without any error or warning 
> message.
> 
> Work Around:
> 
> Wait 30 - 60 scones between each batch (8 - 10 entires) of deletions.  Or 
> select a smaller set of entries (5 - 6) and wait 15 - 20 seconds between each 
> batch.
> 
> Has anyone else experienced this?  Is this a known limitation?

I the previous batch completed before you run the next batch? If a batch
is still running it should show up in the "Progress" view [1], and after
it finished the "LDAP Browser" view usually is refreshed. In you run a
2nd delete batch while the first one is still running it may be related
to the fact that the LDAP API is not really thread safe [2], so if the
same connection is used for multiple operations unexpected things may
happen.

Kind Regards,
Stefan


[1]
https://nightlies.apache.org/directory/studio/2.0.0.v20210213-M16/userguide/ldap_browser/tools_progress_view.html
[2] https://issues.apache.org/jira/browse/DIRAPI-237

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