EPrints Technical Mailing List Archive

See the EPrints wiki for instructions on how to join this mailing list and related information.

Message: #08489

< Previous (by date) | Next (by date) > | < Previous (in thread) | Next (in thread) > | Messages - Most Recent First | Threads - Most Recent First

Re: [EP-tech] [3.4.2] Wrong status of indexer on the admin site

Hi,
This is an interesting issue.  When you go to the main Admin menu page under the System Tools tab what buttons are available for starting and stopping the indexer?  What drives whether the Admin status page stays Running, Stopped, etc. is the presence of the file: 

/usr/share/eprints/var/indexer.pid
and whether there is an indexer process running with the process ID stored in this file.  Also the presence of the file /usr/share/eprints/var/indexer.tick may affect the status you see.  At best guess  the indexer is running but under a different process ID to that in indexer.pid.  It should be noted that if your run something like: 

ps aux | grep indexer
You would get two processes back (three if you include the "grep indexer" process in the command above).  The first is the parent process and this should have the process ID that is in indexer.pid and the second is a child process.  The latter is vulnerable to dying if the indexer task it is undertaking fails in certain ways.  The parent process should spawn a new child process if this happens.
Normally what I would do to clear things up is stop the indexer from the command line.  Then if any indexer processes are still running use the Unix kill command then kill these.  Then finally make sure that the /usr/share/eprints/var/indexer.pid and /usr/share/eprints/var/indexer.tick files are no longer present and delete if they are.  Then I would go back to the web interface to check the indexer's status (to ensure it is stopped) and hopefully then use the Admin page's "Start Indexer" button to restart the indexer.  This should get things back in a consistent state and hopefully the=is inconsistency will not re-occur. 

Hope this helps.  Please let me know if this does not solve your problem.

Regards

David Newman

Subject:  [3.4.2] Wrong status of indexer on the admin site
From:  systems <systems@mdc-berlin.de>
Date: 27/01/2021, 07:28
To: <eprints-tech@ecs.soton.ac.uk>

Hi list,
I try to get eprints working on CentOS8.
As far it looks working, but the on the admin status page, the indexer is marked as stopped. But it runs and the task queue is empty. 

systemctl tells, that it is running and
sudo -u eprints /usr/share/eprints/bin/indexer status
also:
Indexer is running with PID 10960. Next index in 27 seconds

How will the status page check the state of the indexer?


Thanks
for any hints.


*** Options: http://mailman.ecs.soton.ac.uk/mailman/listinfo/eprints-tech
*** Archive: https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eprints.org%2Ftech.php%2F&amp;data=04%7C01%7Ceprints-tech%40ecs.soton.ac.uk%7Cee3fc352e5254122cada08d8c2a7d504%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637473373370180401%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=DruZwRSeEu15jrGJZS%2Bg3X8Jr42brVjk%2Fy%2B%2BLRw2NJA%3D&amp;reserved=0
*** EPrints community wiki: https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwiki.eprints.org%2F&amp;data=04%7C01%7Ceprints-tech%40ecs.soton.ac.uk%7Cee3fc352e5254122cada08d8c2a7d504%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637473373370180401%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Q67Uh6bhQLoKndwI3jYDja1z%2FTtm89fuYZHWetMx0qg%3D&amp;reserved=0

--
This email has been checked for viruses by AVG.
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.avg.com%2F&amp;data=04%7C01%7Ceprints-tech%40ecs.soton.ac.uk%7Cee3fc352e5254122cada08d8c2a7d504%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637473373370180401%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=M02p9zGPzxolyzDW1D%2BNzydAqEilhe%2BJCZTVdn2UeNU%3D&amp;reserved=0