wp-cron.php is hanging

im using 2.31

recently i got a lot of server 500 errors

my support from my host looked into it and told me it was the wp-cron.php that was hanging

this is from my error log
[Fri Dec 14 14:52:05 2007] [error] [client 202.213.200.170] Premature end of script headers: /home/world/public_html/index.php [Fri Dec 14 14:51:59 2007] [error] [client 202.213.200.170] Premature end of script headers: /home/world/public_html/index.php

and this from the server
world 15194 0.0 0.4 27480 17140 ? SN 14:42 0:00 /usr/bin/php wp-cron.php
world 14683 0.0 0.4 27592 17176 ? SN 14:43 0:00 /usr/bin/php wp-cron.php
world 31820 0.0 0.4 27464 17124 ? SN 14:44 0:00 /usr/bin/php wp-cron.php
world 13062 0.1 0.4 27416 17056 ? SN 14:47 0:00 /usr/bin/php wp-cron.php
world 29944 0.1 0.4 27416 17072 ? SN 14:47 0:00 /usr/bin/php wp-cron.php
world 19953 0.1 0.4 27416 17048 ? SN 14:48 0:00 /usr/bin/php wp-cron.php
world 9340 0.1 0.4 27416 17052 ? SN 14:48 0:00 /usr/bin/php wp-cron.php
world 10028 0.1 0.4 27416 17016 ? SN 14:49 0:00 /usr/bin/php wp-cron.php

notice the time twice in one minute for a cron?

Please someone help
thank you