https://savannah02.psi.ch/viewvc/meg_elog/trunk/src/elogd.c?view=log

 OK!

Thank you very much

/UlfO

Hi Stefan and Andreas,

With the latest incremental version of elog (a738232), I have noticed that when attaching a pdf file, the
.png thumbnail is not generated when the "upload" button is pressed - there is just the usual small line saying
what the latest attachment is.  If this happens, a subsequent attachment will force the generation of the
thumbnail for the *previous* attachment, and again no thumbnail for the latest attachment.

Submitting the comment will also generate the thumbnail.

As of yet, I cannot find any consistent pattern to this.  Also, it's hardly a disaster, but I have been fooled
when attaching a pdf file that subsequently turned out to be damaged and thus unreadable.

Hi Stefan and Andreas,

When I submitted the previous entry, I had an error message about not able to send via psxxxx.psi.ch come up as
a red bar at the top of the elog page - sorry, cannot remember the subdomain name correctly.

The observations I was going to make is firstly the change in layout of the Find section - maybe I'll get used
to it but the change in layout wasn't warmly welcomed.

Also, shame that moving from Subversion means that the increments are no longer in easy numerical order.  So I
believe that I am commenting on the latest possible version available, a738232.

A question.  My logbooks directory is now 1.8GB.  Yes, there are a lot of attachments etc to bulk it out, but
it's all plain text comments.  Is there a limit as to the size, or total number of entries?  Elog takes a
notible amount of time to index it all these days, and I have wondered whether a couple of "instabilities" might
be caused by this.  Anyone any thoughts?

I don't know how I managed it, but I got elog to generate two entries with the identical ID no.  The new entries
were different as well.  The log file faithfully had recorded the two separate replies to the entry having the
same ID no as well.   Unfortunately I went and corrected it by editing the YYMMDDa.log file without keeping a
copy.  I have also had a mysterious entry ID0 appear in threaded display, despite there being no entry 0; and if
it appears, it appears in two or three places within the list of threaded entries.

I tried to attach a screenshot showing this, but kept getting a 502 bad gateway error.
The message in the red banner is
Error sending Email via <i>"psquad.psi.ch"</i>
with that html showing, by the way.
> Hi Stefan and Andreas,
> 
> When I submitted the previous entry, I had an error message about not able to send via psxxxx.psi.ch come up as
> a red bar at the top of the elog page - sorry, cannot remember the subdomain name correctly.
> 
> The observations I was going to make is firstly the change in layout of the Find section - maybe I'll get used
> to it but the change in layout wasn't warmly welcomed.
> 
> Also, shame that moving from Subversion means that the increments are no longer in easy numerical order.  So I
> believe that I am commenting on the latest possible version available, a738232.
> 
> A question.  My logbooks directory is now 1.8GB.  Yes, there are a lot of attachments etc to bulk it out, but
> it's all plain text comments.  Is there a limit as to the size, or total number of entries?  Elog takes a
> notible amount of time to index it all these days, and I have wondered whether a couple of "instabilities" might
> be caused by this.  Anyone any thoughts?
> 
> I don't know how I managed it, but I got elog to generate two entries with the identical ID no.  The new entries
> were different as well.  The log file faithfully had recorded the two separate replies to the entry having the
> same ID no as well.   Unfortunately I went and corrected it by editing the YYMMDDa.log file without keeping a
> copy.  I have also had a mysterious entry ID0 appear in threaded display, despite there being no entry 0; and if
> it appears, it appears in two or three places within the list of threaded entries.

Hi Stefan and Andreas

Yesterday I reported I had some issues with the latest elog: but now I can reproduce one.  
elog 2.9.2-a738232

I started a new entry, and attached three pdf files.  I did not get the problem of not seeing the png thumnbnail
this time, although that is annoying if you want/need to adjust the thumbnail image before submitting.

However, if I then look at the running processes, I have the following listed (ps -A)

23677 tty1     00:00:04 elogd
23809 tty1     00:00:00 elogd <defunct>
23825 tty1     00:00:00 elogd <defunct>
23847 pts/0    00:00:00 ps

23677 was when I started the elogd daemon, having killed off the previous daemon etc for test purposes.

23809 and 23825 appeared after a couple of pdfs were added (second and third ones to be precise).  They can only
be killed off by killing off the original running daemon.  It appears that attaching a second and further pdf
attachments to any entry generates an elogd <defunct> in the processes list, although attaching a jpg in the
middle of a list of pdfs didn't (but the next pdf did).  This is happening while adding attachments, that is the
Submit button has yet to be pressed, so it seems to be generated  when the pdf file is being processed for some
reason.

You can end up with quite a stack of these in the process list!

I never saw this behaviour with the previous version I was running, SVN2475 I think.


By the way, I still cannot send an attachment over to this server (showing a screenshot) without the 502 error.

Further work suggests that the type of pdf file might matter, as I have now seen the defunct daemon after
adding the first pdf file in an entry.

However, I have also found that image manipulation (rotation, size) generates a defunct daemon.

> Hi Stefan and Andreas
> 
> Yesterday I reported I had some issues with the latest elog: but now I can reproduce one.  
> elog 2.9.2-a738232
> 
> I started a new entry, and attached three pdf files.  I did not get the problem of not seeing the png thumnbnail
> this time, although that is annoying if you want/need to adjust the thumbnail image before submitting.
> 
> However, if I then look at the running processes, I have the following listed (ps -A)
> 
> 23677 tty1     00:00:04 elogd
> 23809 tty1     00:00:00 elogd <defunct>
> 23825 tty1     00:00:00 elogd <defunct>
> 23847 pts/0    00:00:00 ps
> 
> 23677 was when I started the elogd daemon, having killed off the previous daemon etc for test purposes.
> 
> 23809 and 23825 appeared after a couple of pdfs were added (second and third ones to be precise).  They can only
> be killed off by killing off the original running daemon.  It appears that attaching a second and further pdf
> attachments to any entry generates an elogd <defunct> in the processes list, although attaching a jpg in the
> middle of a list of pdfs didn't (but the next pdf did).  This is happening while adding attachments, that is the
> Submit button has yet to be pressed, so it seems to be generated  when the pdf file is being processed for some
> reason.
> 
> You can end up with quite a stack of these in the process list!
> 
> I never saw this behaviour with the previous version I was running, SVN2475 I think.
> 
> 
> By the way, I still cannot send an attachment over to this server (showing a screenshot) without the 502 error.

Also see this in ALPHA at CERN. Eventually there are so many defunct elogd processes that the user runs out of "maxproc" quota and automatic submission 
of elog messages starts to fail. (and the users complain, reboot all computers, etc).

The elogd we use is this:
https://bitbucket.org/ritt/elog/commits/44800a769b99599db7620779e2142b1161c694fc?at=master

The best I can tell, the main elogd is spawning something but does not reap finished subprocesses (wait() syscall). My guess it is spawning ImageMagik stuff 
to create preview images.

K.O.