[Yanel-dev] problem re-starting Yanel containing a realm with search lock

[Michael Wechner]

Josias Thöny wrote:

> Michael Wechner wrote:
>
>> Josias Thöny wrote:
>
> [...]
>
>>
>>> That's why I changed the behaviour to have only one IndexWriter 
>>> which is closed when the repository is shut down.
>>
>>
>>
>> where exactly did you change this? Within the configure/init and 
>> shutdown methods of Yarep? Is this Yarep repo implementation specific?
>
>
> It's specific to the VFS implementation, and the changes are in r36400 
> and in r36520, concerning these files:
>
> public/yarep/trunk/src/impl/java/org/wyona/yarep/impl/repo/vfs/VirtualFileSystemNode.java 
>
> public/yarep/trunk/src/impl/java/org/wyona/yarep/impl/repo/vfs/VirtualFileSystemOutputStream.java 
>
> public/yarep/trunk/src/impl/java/org/wyona/yarep/impl/repo/vfs/VirtualFileSystemRepository.java 
>


thanks very much for these pointers

>
> I think it concerns the clustered repos which use vfs and use indexing.


ok

>
>> and I would like to fix this as quick as possible. At the same time 
>> you are saying that one receives a LockObtainFailedExceptions when 
>> multiple threads are trying to write. I am sure there is some way 
>> that we can fix both problems.
>
>
> I had a closer look at the lucene implementation. It seems that when 
> it's trying to obtain the write lock, it actually tries multiple times 
> until a timeout occurs. The default timeout is 1 second.
> Maybe we can revert to the old way, increase the timeout,


although I wouldn't increase it much more. Btw, where exactly is this 
configurable?

> and catch&ignore the LockObtainFailedException.
> I hope this should fix the problems, or WDYT?


sounds like a good workaround. Maybe it would be good to log this into a 
dedicated log-file, e.g. lucene.log, I mean when the 
LockObtainFailedException is caught, that we log when exactly and for 
what file this problem occured, such that one has a chance to maybe 
re-index these files?

WDYT?

Thanks

Michi

>
> josias
>
>>
>> Any idea?
>>
>> Thanks
>>
>> Michi
>>
>>>
>>> Josias
>>>
>>> [1] 
>>> http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/index/IndexWriter.html 
>>>
>>>
>>>>
>>>>> Maybe with a finalize() method of the IdentityManager/PolicyManager?
>>>>>
>>>>> BTW, why is indexing enabled for the res-config repository of the 
>>>>> yanel-website realm?
>>>>
>>>>
>>>>
>>>>
>>>> no, it would make sense to disable this.
>>>>
>>>> Cheers
>>>>
>>>> Michi
>>>>
>>>>>
>>>>> josias
>>>>>
>>>>>>
>>>>>> Also maybe 
>>>>>> http://www.manning-sandbox.com/message.jspa?messageID=39279 helps
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> Michi
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Yanel-development mailing list
>>>>> Yanel-development at wyona.com
>>>>> http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>> _______________________________________________
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>>
>>
>>
>>
>
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-- 
Michael Wechner
Wyona      -   Open Source Content Management - Yanel, Yulup
http://www.wyona.com
michael.wechner at wyona.com, michi at apache.org
+41 44 272 91 61