Java NullPointerException when running test

Hi,

i am runnig analyzer tests on multiple esx hosts but i only get esxtop

stats for one host. In the log i see java nullpointer exceptions when the

esxtop collection starts for four of my five test hosts no data is collected.

It is random which host is the one where data is collected succesfully.

Sometimes i see null pointer exceptions for all 5 hosts, which results

in a premature test end because the script is waiting for iometer data

while the tests are still running.

The iometer data is collected correctly for all 10 vms running on the 5

hosts.

Any help is greately appreciated.

Log lines: