Description of problem:
Collectd doesn't work with the pymongo module, it is unable to find the symbol _Py_ZeroStruct.

Configure collectd with the following /etc/collectd.conf configuration:
Hostname    "test"
FQDNLookup   false
BaseDir     "/tmp/foo"

<LoadPlugin python>
    Globals true
</LoadPlugin>

<Plugin python>
    ModulePath "/tmp/plugins"

    Import "mongodb"
    <Module mongodb>
        Host "127.0.0.1"
    </Module>
</Plugin>

The /tmp/plugins/mongodb.py plugin is:
import collectd
from pymongo import Connection

class MongoDB(object):

    def __init__(self):
        self.plugin_name = "mongo"

mongodb = MongoDB()

Then run collected:
collectd -C collectd.conf -P /tmp/collectd.pid

Gives the error:
Unhandled python exception in importing module: ImportError: /usr/lib64/python2.4/lib-dynload/datetime.so: undefined symbol: _Py_ZeroStruct

and doesn't run the mongodb plugin.

Version-Release number of selected component (if applicable):
rpm -qa pymongo python collectd --qf '%{NAME} %{VERSION} %{RELEASE} %{ARCH}\n'
python 2.4.3 27.el5 x86_64
collectd 4.10.3 1.el5 x86_64
pymongo 1.9 8.el5 x86_64

How reproducible:
Always

Steps to Reproduce:
1. Configure as above
2. Run collectd
3.
  
Actual results:
The following error is generated and the python plugin isn't used:
plugin_load_file: The global flag is not supported, libtool 2 is required for this.
python plugin: Error importing module "mongodb".
Unhandled python exception in importing module: ImportError: /usr/lib64/python2.4/lib-dynload/datetime.so: undefined symbol: _Py_ZeroStruct
python plugin: Found a configuration for the "mongodb" plugin, but the plugin isn't loaded or didn't register a configuration callback.

Expected results:
No undefined symbol message.

Additional info:
By explicitly setting LD_PRELOAD to point at libpython, the error is suppressed and the module appears to function correctly.

LD_PRELOAD=/usr/lib64/libpython2.4.so collectd -C collectd.conf -P /tmp/collectd.pid
plugin_load_file: The global flag is not supported, libtool 2 is required for this.
python plugin: Found a configuration for the "mongodb" plugin, but the plugin isn't loaded or didn't register a configuration callback.