Re: unable to migrate: virPortAllocatorSetUsed:299 : internal error: Failed to reserve port 49153

On libvirt 6.8.0 and qemu 5.1.0, when trying to live migrate "error: internal error: Failed to reserve port" error is received and migration does not succeed: virsh # migrate cartridge qemu+tls://ratchet.lan/system --live --persistent --undefinesource --copy-storage-all --verbose error: internal error: Failed to reserve port 49153 virsh # On target host with debug logs, nothing interesting but the error itself is found in the logs ... 2020-10-12 02:11:33.852+0000: 6871: debug : qemuMonitorJSONIOProcessLine:220 : Line [{"return": {}, "id": "libvirt-373"}] 2020-10-12 02:11:33.852+0000: 6871: info : qemuMonitorJSONIOProcessLine:239 : QEMU_MONITOR_RECV_REPLY: mon=0x7fe784255020 reply={"return": {}, "id": "libvirt-373"} 2020-10-12 02:11:33.852+0000: 6825: debug : qemuDomainObjExitMonitorInternal:5615 : Exited monitor (mon=0x7fe784255020 vm=0x55f086c81ea0 name=cartridge) 2020-10-12 02:11:33.852+0000: 6825: debug : qemuDomainObjEndJob:1140 : Stopping job: async nested (async=migration in vm=0x55f086c81ea0 name=cartridge) 2020-10-12 02:11:33.852+0000: 6825: error : virPortAllocatorSetUsed:299 : internal error: Failed to reserve port 49153 2020-10-12 02:11:33.852+0000: 6825: debug : qemuMigrationParamsReset:1206 : Resetting migration parameters 0x7fe784257c30, flags 0x59 2020-10-12 02:11:33.852+0000: 6825: debug : qemuDomainObjBeginJobInternal:835 : Starting job: job=async nested agentJob=none asyncJob=none (vm=0x55f086c81ea0 name=cartridge, current job=none agentJob=none async=migration in) 2020-10-12 02:11:33.852+0000: 6825: debug : qemuDomainObjBeginJobInternal:887 : Started job: async nested (async=migration in vm=0x55f086c81ea0 name=cartridge) 2020-10-12 02:11:33.852+0000: 6825: debug : qemuDomainObjEnterMonitorInternal:5590 : Entering monitor (mon=0x7fe784255020 vm=0x55f086c81ea0 name=cartridge) 2020-10-12 02:11:33.852+0000: 6825: debug : qemuMonitorSetMigrationCapabilities:3853 : mon:0x7fe784255020 vm:0x55f086c81ea0 fd:30 2020-10-12 02:11:33.852+0000: 6825: info : qemuMonitorSend:944 : QEMU_MONITOR_SEND_MSG: mon=0x7fe784255020 msg={"execute":"migrate-set-capabilities","arguments":{"capabilities":[{"capability":"xbzrle","state":false},{"capability":"auto-converge","state":false},{"capability":"rdma-pin-all","state":false},{"capability> fd=-1 ... Full logs: destination: https://drive.google.com/file/d/1g986SbSVijvwZd8d7xDrJwo_AmKH-JnV/view?us... source: https://drive.google.com/file/d/1lsV2EOBxF7xH5-lgz2Psh9YSkOePXvAd/view?us... On target host, nothing is listening on the target port: ratchet /var/log/libvirt/qemu # netstat -lnp | grep 49153 | wc -l 0 and nc -l 49153 succeeds without issues. Do you have any suggestions on how to proceed here?