Hi Dan, I've reproduced this problem with the newest NM (checkout from git, master branch, commit: dc54f52fb563dc64fe3036f8afb7ef82ae1d5480<http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=dc54f52fb563dc64fe3036f8afb7ef82ae1d5480>) and dhcp-client 3.1.1. I enabled only one network interface--wlan0.
The result:
1) Some DHCPClients are still living (until I kills them manually),
though it reports state 15 (in function <nm_dhcp_manager_begin_transaction>)
2) This pidfile (in function <nm_dhcp_client_start>) doesn't indicate an
existing DHCPClient（see the attachment "debug.diff"）, so another DHCPClient
for the same network interface is forked.
[attachements]
1) debug.diff: Adds some logging code.
2) log.gz: The log file, may be a little big, so I compressed it.
diff --git a/src/dhcp-manager/nm-dhcp-dhclient.c b/src/dhcp-manager/nm-dhcp-dhclient.c
index 946be0c..625d9bc 100644
--- a/src/dhcp-manager/nm-dhcp-dhclient.c
+++ b/src/dhcp-manager/nm-dhcp-dhclient.c
@@ -250,6 +250,8 @@ nm_dhcp_client_start (NMDHCPDevice *device, NMSettingIP4Config *s_ip4)
if (!((tmp == ULONG_MAX) && (errno == ERANGE)))
nm_dhcp_client_stop (device, (pid_t) tmp);
remove (device->pid_file);
+ }else if (device->pid) {
+ nm_debug ("Miss kill existing dhclient, pid %d", device->pid);
}
dhclient_argv = g_ptr_array_new ();
diff --git a/src/dhcp-manager/nm-dhcp-manager.c b/src/dhcp-manager/nm-dhcp-manager.c
index b2e352d..b3d0665 100644
--- a/src/dhcp-manager/nm-dhcp-manager.c
+++ b/src/dhcp-manager/nm-dhcp-manager.c
@@ -592,6 +592,7 @@ nm_dhcp_manager_begin_transaction (NMDHCPManager *manager,
if (!device)
device = nm_dhcp_device_new (manager, iface);
+ nm_debug ("device->pid: %d, device->state: %d", device->pid, device->state);
if (device->pid && (device->state < DHC_ABEND)) {
/* Cancel any DHCP transaction already in progress */
nm_dhcp_manager_cancel_transaction_real (device);
log.gz
Description: GNU Zip compressed data
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