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[ONOS-3159] fix a concurrency issue in DHCPRelay.java
Change-Id: Ib9bc5d0f0e788ceabc5272a05ac52a6753a3a229
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... | @@ -384,6 +384,10 @@ public class DhcpRelay { | ... | @@ -384,6 +384,10 @@ public class DhcpRelay { |
384 | MacAddress descMac = new MacAddress(dhcpPayload.getClientHardwareAddress()); | 384 | MacAddress descMac = new MacAddress(dhcpPayload.getClientHardwareAddress()); |
385 | Host host = hostService.getHost(HostId.hostId(descMac, | 385 | Host host = hostService.getHost(HostId.hostId(descMac, |
386 | VlanId.vlanId(ethPacket.getVlanID()))); | 386 | VlanId.vlanId(ethPacket.getVlanID()))); |
387 | + //handle the concurrent host offline scenario | ||
388 | + if (host == null) { | ||
389 | + return; | ||
390 | + } | ||
387 | ConnectPoint dhcpRequestor = new ConnectPoint(host.location().elementId(), | 391 | ConnectPoint dhcpRequestor = new ConnectPoint(host.location().elementId(), |
388 | host.location().port()); | 392 | host.location().port()); |
389 | 393 | ... | ... |
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