Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Does the python process use a lot of CPU when it hangs? Check using top.</p> <p>Install <a href="https://pypi.python.org/pypi/ZopeHealthWatcher/" rel="nofollow">ZopeHealthWatcher</a>, then when it hangs again, use zope health watcher to get a list of what each thread is doing. That will often give you an idea of where the code is sitting either in a loop, in infinite recursion of some sort (this can happen in the zodb, especially with acquisition and similarly named things), or if it is merely blocking on something (eg, mtu issues on the network link to the smtp server for example, so small emails work but big ones hang).</p> <p>You could also stop the smtp server (or just change the port in the plone control panel) and see if you at least get an exception out of that. Plone should, by default, raise an exception if it cannot connect to the smtp server.</p> <p>In really extreme cases, you can <a href="http://wiki.python.org/moin/DebuggingWithGdb" rel="nofollow">use gdb</a> to connect to the hanging python process (I usually use "top" to find the one sitting at 100% CPU), and you could then find where it is hanging. This is a lot more complex than using ZopeHealthWatcher, but I successfully traced a hang to a race condition in reportlabs font code recently using precisely this method, it is very powerful. What is nice about gdb, is it stops the process and allows you to step through the code, and up and down the calling stack, unlike ZopeHealthWatcher which just gives you a snapshot (a bit like that Heissenberg uncertainty thing, you can observe where it is now...)</p>
    singulars
    1. This table or related slice is empty.
    1. POUnable to request a user password reset
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USizak
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThank you. This is valuable debugging technique. I found that the port to use for the SMTP configuration of Plone was 587 and not 465 as I thought. It would be great if Plone was not hanging for this reason. I guess this is a Plone bug.
      singulars
      1. PO
      1. USPierre Thibault
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload