Cannot load from byte/boolean array because "m" is null

[siosios]

I'm having a hard time figuring this out, any help would be much appreciated

2025-12-16 14:14:29,520 ERROR [cloud.agent.AgentShell] (main:[]) (logid:) Unable to start agent: java.lang.NullPointerException: Cannot load from byte/boolean array because "m" is null
        at com.cloud.utils.net.NetUtils.byte2Mac(NetUtils.java:500)
        at com.cloud.utils.net.NetUtils.getNetworkParams(NetUtils.java:479)
        at com.cloud.utils.net.NetUtils.getNicParams(NetUtils.java:433)
        at com.cloud.resource.ServerResourceBase.isValidNicToUseAsPrivateNic(ServerResourceBase.java:147)
        at com.cloud.resource.ServerResourceBase.tryToAutoDiscoverResourcePrivateNetworkInterface(ServerResourceBase.java:125)
        at com.cloud.resource.ServerResourceBase.configure(ServerResourceBase.java:79)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.configure(LibvirtComputingResource.java:980)
        at com.cloud.agent.Agent.<init>(Agent.java:239)
        at com.cloud.agent.AgentShell.launchNewAgent(AgentShell.java:475)
        at com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:454)
        at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:438)
        at com.cloud.agent.AgentShell.start(AgentShell.java:539)
        at com.cloud.agent.AgentShell.main(AgentShell.java:569)

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[weizhouapache]

@siosios
can you share the output of ip a command ?

[siosios]

[root@cloud ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever

2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether c8:1f:66:e0:27:dd brd ff:ff:ff:ff:ff:ff
    altname enp1s0f0

3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether c8:1f:66:e0:27:de brd ff:ff:ff:ff:ff:ff
    altname enp1s0f1

4: eno3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether c8:1f:66:e0:27:df brd ff:ff:ff:ff:ff:ff
    altname enp2s0f0

5: eno4: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether c8:1f:66:e0:27:e0 brd ff:ff:ff:ff:ff:ff
    altname enp2s0f1

6: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 24:8a:07:e9:9b:20 brd ff:ff:ff:ff:ff:ff
    inet 192.168.4.65/24 brd 192.168.4.255 scope global noprefixroute enp4s0
       valid_lft forever preferred_lft forever

7: enp5s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 24:8a:07:e9:92:a0 brd ff:ff:ff:ff:ff:ff

8: idrac: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
    link/ether d0:94:66:23:75:29 brd ff:ff:ff:ff:ff:ff
    altname enp0s20u12u3
    inet 169.254.0.2/24 brd 169.254.0.255 scope link dynamic noprefixroute idrac
       valid_lft 504546sec preferred_lft 504546sec
    inet6 fe80::5cc0:ddb6:ad4b:bc7b/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

9: cloudbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 72:f8:c2:f2:a4:7f brd ff:ff:ff:ff:ff:ff

10: cloudbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.4.48/24 brd 192.168.4.255 scope global noprefixroute cloudbr0
       valid_lft forever preferred_lft forever

11: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
    inet 169.254.0.1/16 scope global cloud0
       valid_lft forever preferred_lft forever

log entry:

2025-12-16 15:51:57,855 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) Agent started
2025-12-16 15:51:57,859 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) Implementation Version is 4.22.0.0
2025-12-16 15:51:57,860 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
2025-12-16 15:51:57,866 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [host] was altered. Now using the value [192.168.4.65@static].
2025-12-16 15:51:57,891 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [guid] was altered. Now using the value [a667d78d-f97e-34fa-8702-9390d1b5c3ff].
2025-12-16 15:51:57,892 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [port] was altered. Now using the value [8250].
2025-12-16 15:51:57,892 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [workers] was altered. Now using the value [5].
2025-12-16 15:51:57,893 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [zone] was altered. Now using the value [1].
2025-12-16 15:51:57,893 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [pod] was altered. Now using the value [1].
2025-12-16 15:51:57,893 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [consoleproxy.httpListenPort] has empty or null value. Using default value [443].
2025-12-16 15:51:57,894 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [ping.retries] has empty or null value. Using default value [5].
2025-12-16 15:51:57,894 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [host.lb.check.interval] has empty or null value. Using default value [null].
2025-12-16 15:51:57,894 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: resource
2025-12-16 15:51:57,894 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: guest.network.device
2025-12-16 15:51:57,894 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: local.storage.uuid
2025-12-16 15:51:57,894 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: LibvirtComputingResource.uuid
2025-12-16 15:51:57,894 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: port
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: LibvirtComputingResource.name
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: iscsi.session.cleanup.enabled
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: host
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: pod
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: guid
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: LibvirtComputingResource.id
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: cluster
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: public.network.device
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: private.network.device
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: zone
2025-12-16 15:51:57,895 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: domr.scripts.dir
2025-12-16 15:51:57,896 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: keystore.passphrase
2025-12-16 15:51:57,896 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: guest.cpu.mode
2025-12-16 15:51:57,896 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: vm.migrate.wait
2025-12-16 15:51:57,896 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: workers
2025-12-16 15:51:57,896 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Found property: hypervisor.type
2025-12-16 15:51:57,896 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) Defaulting to using properties file for storage
2025-12-16 15:51:57,897 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) Defaulting to the constant time backoff algorithm
2025-12-16 15:51:57,923 INFO  [cloud.utils.LogUtils] (main:[]) (logid:) log4j configuration found at /etc/cloudstack/agent/log4j-cloud.xml
2025-12-16 15:51:57,924 INFO  [cloud.agent.AgentShell] (main:[]) (logid:) Using default Java settings for IPv6 preference for agent connection
2025-12-16 15:51:57,924 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [developer] has empty or null value. Using default value [false].
2025-12-16 15:51:57,925 DEBUG [cloud.agent.AgentShell] (main:[]) (logid:) Checking to see if agent.pid exists.
2025-12-16 15:51:57,930 DEBUG [cloud.utils.ProcessUtil] (main:[]) (logid:) Executing command [bash -c echo $PPID ].
2025-12-16 15:51:57,948 DEBUG [cloud.utils.ProcessUtil] (main:[]) (logid:) Successfully executed process [3558631] for command [bash -c echo $PPID ].
2025-12-16 15:51:57,954 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [resource] was altered. Now using the value [com.cloud.hypervisor.kvm.resource.LibvirtComputingResource].
2025-12-16 15:51:57,982 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [enable.manually.setting.cpu.topology.on.kvm.vm] has empty or null value. Using default value [true].
2025-12-16 15:51:57,991 INFO  [cloud.agent.Agent] (main:[]) (logid:) Initialising agent [id: 1, uuid: 4fbc87c7-81d8-44f6-b627-bf1f15d2a120, name: cloud.priv]
2025-12-16 15:51:57,992 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [private.network.device] was altered. Now using the value [cloudbr0].
2025-12-16 15:51:57,992 DEBUG [agent.properties.AgentPropertiesFileHandler] (main:[]) (logid:) Property [public.network.device] was altered. Now using the value [cloudbr0].
2025-12-16 15:51:57,994 DEBUG [utils.net.NetUtils] (main:[]) (logid:) Retrieving network interface [cloudbr0].
2025-12-16 15:51:57,995 DEBUG [utils.net.NetUtils] (main:[]) (logid:) Retrieving network interface [cloudbr0].
2025-12-16 15:51:57,995 DEBUG [utils.net.NetUtils] (main:[]) (logid:) Retrieving network params of NIC [name:cloudbr0 (cloudbr0)].
2025-12-16 15:51:57,997 DEBUG [utils.net.NetUtils] (main:[]) (logid:) Retrieving params of address [/192.168.4.48/24 [/192.168.4.255]] of NIC [name:cloudbr0 (cloudbr0)].
2025-12-16 15:51:57,997 ERROR [cloud.agent.AgentShell] (main:[]) (logid:) Unable to start agent: java.lang.NullPointerException: Cannot load from byte/boolean array because "m" is null
        at com.cloud.utils.net.NetUtils.byte2Mac(NetUtils.java:500)
        at com.cloud.utils.net.NetUtils.getNetworkParams(NetUtils.java:479)
        at com.cloud.resource.ServerResourceBase.configure(ServerResourceBase.java:82)
        at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.configure(LibvirtComputingResource.java:980)
        at com.cloud.agent.Agent.<init>(Agent.java:239)
        at com.cloud.agent.AgentShell.launchNewAgent(AgentShell.java:475)
        at com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:454)
        at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:438)
        at com.cloud.agent.AgentShell.start(AgentShell.java:539)
        at com.cloud.agent.AgentShell.main(AgentShell.java:569)

[weizhouapache]

@siosios
it looks like the cloudbr0 is misconfigured. the state is DOWN, and the mac address is 00:00:00:00:00:00