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From Karl Wright <daddy...@gmail.com>
Subject Re: Job with Generic Connector stop to work
Date Fri, 06 May 2016 13:10:27 GMT
Hi Luca,

It is not clear what you mean by "multi value extraction" using the JDBC
connector.  The JDBC connector allows collection of primary binary content
as well as metadata from a database row.  So maybe if you can explain what
you need beyond that it would help.

Thanks,
Karl


On Fri, May 6, 2016 at 9:04 AM, Luca Alicata <alicataluca@gmail.com> wrote:

> Hi Karl,
> thanks for information, fortunately in other jboss instance i have a old
> Manifold configuration with single process, that i've dismissed. But in
> this moment, i start to test this jobs with that and if it work fine, i can
> use it only for this job and use it also in production. Maybe after, if i
> can, i try to check the possible problem that stop the agent.
>
> I Take advantage of this discussion to ask you, if multi-value extraction
> from db is consider as possible future work or no. Because i've used this
> generi connector to resolve this lack of JDBC Connector. In fact with
> Manifold 1.8 i've modified the connector to support this behavior (in
> addiction to parse blob file), but upgrade Manifold Version, to not rewrite
> the new connector i decide to use Generic Connector with application that
> do the work of extraction data from DB.
>
> Thanks,
> L. Alicata
>
> 2016-05-06 14:42 GMT+02:00 Karl Wright <daddywri@gmail.com>:
>
>> Hi Luca,
>>
>> If you do a lock clean and the process still stops, then the locks are
>> not the problem.
>>
>> One way we can drill down into the problem is to get a thread dump of the
>> agents process after it stops.  The thread dump must be of the agents
>> process, not any of the others.
>>
>> FWIW, the generic connector is not well supported; the person who wrote
>> it is still a committer but is not actively involved in MCF development at
>> this time.  I suspect that the problem may have to do with how that
>> connector deals with exceptions or errors, but I am not sure.
>>
>> Thanks,
>>
>> Karl
>>
>>
>> On Fri, May 6, 2016 at 8:38 AM, Luca Alicata <alicataluca@gmail.com>
>> wrote:
>>
>>> Hi Karl,
>>> I've just tried with lock-clean after agents stop to work, obviously
>>> after stopping process. After this, job start correctly, but just second
>>> time that i start a job with a lot of data (or sometimes the third time),
>>> agent stop again.
>>>
>>> Unfortunately, it's difficult start, for the moment, to using Zookeeper
>>> in this environment, but this can resolve the fact that during working
>>> agents stop to work? or help only for cleaning lock agent when i restart
>>> the process?
>>>
>>> Thanks,
>>> L. Alicata
>>>
>>> 2016-05-06 14:15 GMT+02:00 Karl Wright <daddywri@gmail.com>:
>>>
>>>> Hi Luca,
>>>>
>>>> With file-based synchronization, if you kill any of the processes
>>>> involved, you will need to execute the lock-clean procedure to make sure
>>>> you have no dangling locks in the file system.
>>>>
>>>> - shut down all MCF processes (except the database)
>>>> - run the lock-clean script
>>>> - start your MCF processes back up
>>>>
>>>> I suspect what you are seeing is related to this.
>>>>
>>>> Also, please consider using Zookeeper instead, since it is more robust
>>>> about cleaning out dangling locks.
>>>>
>>>> Thanks,
>>>> Karl
>>>>
>>>>
>>>> On Fri, May 6, 2016 at 8:06 AM, Luca Alicata <alicataluca@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi Karl,
>>>>> thanks for help.
>>>>> In my case i've only one instance of MCF running, with both type of
>>>>> job (SP and Generic), and so i have only one properties files (that i
have
>>>>> attached).
>>>>> For information i used (multiprocess-file configuration) with postgres.
>>>>>
>>>>> Do you have other suggestions? do you need more information, that i
>>>>> can give you?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> L.Alicata
>>>>>
>>>>> 2016-05-06 12:55 GMT+02:00 Karl Wright <daddywri@gmail.com>:
>>>>>
>>>>>> Hi Luca,
>>>>>>
>>>>>> Do you have multiple independent MCF clusters running at the same
>>>>>> time?  It sounds like you do: you have SP on one, and Generic on
another.
>>>>>> If so, you will need to be sure that the synchronization you are
using
>>>>>> (either zookeeper or file-based) does not overlap.  Each cluster
needs its
>>>>>> own synchronization.  If there is overlap, then doing things with
one
>>>>>> cluster may cause the other cluster to hang.  This also means you
have to
>>>>>> have different properties files for the two clusters, of course.
>>>>>>
>>>>>> Thanks,
>>>>>> Karl
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, May 6, 2016 at 4:32 AM, Luca Alicata <alicataluca@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>> i'm using Manifold 2.2 with multi-process configuration in Jboss
>>>>>>> instance inside a Windows Server 2012 and i've a set of job that
work with
>>>>>>> Sharepoint (SP) or Generic Connector (GC), that get file from
a db.
>>>>>>> With SP i've no problem, while with GC with a lot of document
(one
>>>>>>> with 47k and another with 60k), the Seed taking process, sometimes,
not
>>>>>>> finish, because the agents seem to stop (although java process
is still
>>>>>>> alive).
>>>>>>> After this, if i try to start any other job, that not start,
like
>>>>>>> the agents are stopped.
>>>>>>>
>>>>>>> Other times, this jobs work correctly and one time together work
>>>>>>> correctly, running in the same moment.
>>>>>>>
>>>>>>> For information:
>>>>>>>
>>>>>>>    - On Jboss there are only Manifold and Generic Repository
>>>>>>>    application.
>>>>>>>
>>>>>>>
>>>>>>>    - On the same Virtual Server, there is another Jboss istance,
>>>>>>>    with solr istance and a web application.
>>>>>>>
>>>>>>>
>>>>>>>    - I've check if it was a type of memory problem, but it's
not
>>>>>>>    the case.
>>>>>>>
>>>>>>>
>>>>>>>    - GC with almost 23k seed work always, at least in test that
>>>>>>>    i've done.
>>>>>>>
>>>>>>>
>>>>>>>    - In local instance of Jboss with Manifold and Generic Rpository
>>>>>>>    Application, i've not keep this problem.
>>>>>>>
>>>>>>> This is the only recurrent information that i've seen on
>>>>>>> manifold.log:
>>>>>>> ---------------
>>>>>>> Connection 0.0.0.0:62755<-><ip-address>:<port>
shut down
>>>>>>> Releasing connection
>>>>>>> org.apache.http.impl.conn.ManagedClientConnectionImpl@6c98c1bd
>>>>>>>
>>>>>>> ---------------
>>>>>>>
>>>>>>> Thanks,
>>>>>>> L. Alicata
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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