This is an expected behavior when pktcap-uw is terminated incorrectly.
To resolve this issue, reboot the ESXi host.
To terminate the pktcap-uw command correctly:
- In ESXi 5.5, you must use a CTRL^C, kill -2, or kill -SIGINT command.
- In ESXi 6.0, you can use any of the commands listed above or just the kill command. In ESXi 6.0, the kill command defaults to kill -2 automatically.
If the pktcap-uw command is terminated by any other signal, reboot the host as soon as possible.