trouble when converting many epubs to epubs

comet · 03-20-2012, 04:18 PM

I tried to convert 11 epubs again to epubs. Calibre started converting and finished 10 books conversion. The conversion of the 11th started, but in the progress bar of the job I got the message that no information about progress was available and calibre didn't finish. I had to stop this job und start it again. Then calibre finished very fast. Does calibre have a problem converting many books simultanously?

theducks · 03-20-2012, 04:47 PM

Quote:

Originally Posted by comet

I tried to convert 11 epubs again to epubs. Calibre started converting and finished 10 books conversion. The conversion of the 11th started, but in the progress bar of the job I got the message that no information about progress was available and calibre didn't finish. I had to stop this job und start it again. Then calibre finished very fast. Does calibre have a problem converting many books simultanously?

Not officially

What OS? What version NUMBER of calibre?
What is the value in Preferences: Miscellaneous: 'Maximum Conversions..." ?

comet · 03-20-2012, 04:54 PM

OS: Linux (Ubuntu 10.04)
Calibre: 0.8.43
Maximum Conversions: 3
The maximum number is limited to the number of CPU cores, that means 4 on my system

JSWolf · 03-20-2012, 05:09 PM

Converting ePub > ePub is a really bad idea. If you have an issue with these ePub, use Sigil to fix them the tweak program to go in and make the changes.

comet · 03-20-2012, 05:14 PM

I have the problem that calibre's viewer doesn't show some epubs former versions of calibre were able to show. With these epubs I now only get an empty white screen in the previewer. After converting them using epub to epub the viewer is again able to show them.

theducks · 03-20-2012, 05:17 PM

Quote:

Originally Posted by comet

OS: Linux (Ubuntu 10.04)
Calibre: 0.8.43
Maximum Conversions: 3
The maximum number is limited to the number of CPU cores, that means 4 on my system

Now we wait for Kovid

BTW my Ubuntu Natty rig (1G RAM P4-3.2 Hyper threaded) has been taking OMG time (1000+ on some, others just minutes) on EPUB to Mobi.
(and something started Calibre using Swap, which almost never gets used when Only Calibre is running.)

I have seen Calibre 8.43 leave behind, and running, Killed (in) Calibre tasks.
I also had a spontaneous reboot happen yesterday, while 2 long running converts were running. The KVM was on the Window system when it happened)
And I later found a Zombie Calibre-Parrallel

As soon as this set finishes, I will run Memtest86

speakingtohe · 03-20-2012, 06:51 PM

Quote:

And I later found a Zombie Calibre-Parrallel

Now you are scaring me

theducks · 03-20-2012, 06:52 PM

Quote:

Originally Posted by speakingtohe

Now you are scaring me

You only get Zombies on Linux, Windows would rather BSOD on you

speakingtohe · 03-20-2012, 07:02 PM

Hmm I had a BSOD on a laptop I bought a couple of weeks ago (well 24+) so I sent it back. Replacement is fine I think and never had one on my desktop.

Zombies seems scarier though and in a weird way almost desireable to those of us who know no better.

Helen

JSWolf · 03-20-2012, 08:55 PM

Quote:

Originally Posted by comet

I have the problem that calibre's viewer doesn't show some epubs former versions of calibre were able to show. With these epubs I now only get an empty white screen in the previewer. After converting them using epub to epub the viewer is again able to show them.

When testing an ePub, use ADE. Don't use any other program to display it. If it works, then it's the fault of the other program.

kovidgoyal · 03-20-2012, 11:44 PM

This is a longstanding issue with IPC on some linux systems that I have never been able to reprduce and no one else has been able to track down. Basically the last job in a large batch of jobs hangs endlessly.

theducks · 03-21-2012, 12:34 AM

Here is a screen shot.
I killed a 1900 Minute convert (the last running) in about 10)
Closed Calibre and the CPU loag did not fall

Screen capture and Files open for the orphaned Calibre Process

kovidgoyal · 03-21-2012, 01:10 AM

The only way to debug this is to run calibre from source and add debugging code to the IPC sections of calibre.

As a first step if you can consistently reproduce it, run calibre in a terminal and see if any tracebacks are printed. Then add some print statements to main() inipc/worker.py and see what's happening.

cybmole · 03-21-2012, 02:57 AM

Quote:

Originally Posted by JSWolf

Converting ePub > ePub is a really bad idea. If you have an issue with these ePub, use Sigil to fix them the tweak program to go in and make the changes.

disagree, sometimes it can take a very long time to manually locate an obscure glitch via sigil, whereas epub to epub is often a very fast quick fix. it is very good e.g. at regularising margins & stripping irrelevancies from css. it is also the only practical way to quickly break a single large xhtml into chapter sized chunks

03-20-2012, 04:18 PM	#1
comet Connoisseur Posts: 66 Karma: 10 Join Date: Feb 2010 Location: Germany Device: Kindle Voyage, Kindle Oasis , Kindle Oasis 2, Tolino Epos	trouble when converting many epubs to epubs I tried to convert 11 epubs again to epubs. Calibre started converting and finished 10 books conversion. The conversion of the 11th started, but in the progress bar of the job I got the message that no information about progress was available and calibre didn't finish. I had to stop this job und start it again. Then calibre finished very fast. Does calibre have a problem converting many books simultanously?

03-21-2012, 12:34 AM	#12
theducks Well trained by Cats Posts: 31,267 Karma: 61916422 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Orphan Here is a screen shot. I killed a 1900 Minute convert (the last running) in about 10) Closed Calibre and the CPU loag did not fall Screen capture and Files open for the orphaned Calibre Process Attached Thumbnails

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03-20-2012, 04:54 PM	#3
comet Connoisseur Posts: 66 Karma: 10 Join Date: Feb 2010 Location: Germany Device: Kindle Voyage, Kindle Oasis , Kindle Oasis 2, Tolino Epos	OS: Linux (Ubuntu 10.04) Calibre: 0.8.43 Maximum Conversions: 3 The maximum number is limited to the number of CPU cores, that means 4 on my system

03-20-2012, 05:09 PM	#4
JSWolf Resident Curmudgeon Posts: 80,782 Karma: 150249619 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Converting ePub > ePub is a really bad idea. If you have an issue with these ePub, use Sigil to fix them the tweak program to go in and make the changes.

03-20-2012, 05:14 PM	#5
comet Connoisseur Posts: 66 Karma: 10 Join Date: Feb 2010 Location: Germany Device: Kindle Voyage, Kindle Oasis , Kindle Oasis 2, Tolino Epos	I have the problem that calibre's viewer doesn't show some epubs former versions of calibre were able to show. With these epubs I now only get an empty white screen in the previewer. After converting them using epub to epub the viewer is again able to show them.

03-20-2012, 07:02 PM	#9
speakingtohe Wizard Posts: 4,812 Karma: 26912940 Join Date: Apr 2010 Device: sony PRS-T1 and T3, Kobo Mini and Aura HD, Tablet	Hmm I had a BSOD on a laptop I bought a couple of weeks ago (well 24+) so I sent it back. Replacement is fine I think and never had one on my desktop. Zombies seems scarier though and in a weird way almost desireable to those of us who know no better. Helen

03-20-2012, 11:44 PM	#11
kovidgoyal creator of calibre Posts: 45,609 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	This is a longstanding issue with IPC on some linux systems that I have never been able to reprduce and no one else has been able to track down. Basically the last job in a large batch of jobs hangs endlessly.

03-21-2012, 01:10 AM	#13
kovidgoyal creator of calibre Posts: 45,609 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The only way to debug this is to run calibre from source and add debugging code to the IPC sections of calibre. As a first step if you can consistently reproduce it, run calibre in a terminal and see if any tracebacks are printed. Then add some print statements to main() inipc/worker.py and see what's happening.

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