ESXI Host show only a single ISCSI Path

Hi,

i have a cluster of 3 ESXI 5.5 hosts, each host is configured with 2 vmkernel adapters for ISCSI.

After restarting the first ESXI, I found that there is only one path left for each ISCSI LUN.

On the other hosts it show two paths for each ISCSI LUN.

i tried to restart the host, rescan the target, etc. but nothing works.