I kicked off another ~20K reboot tests with Standard_B2S instances and hit hangs again:
IP addr Mac Addr Kernel Reboots 104.42.3.161 00:0d:3a:37:82:ee 5.0.0-1020-azure 100 13.91.5.23 00:0d:3a:5a:74:23 5.0.0-1020-azure 57 [ HANG ] 13.91.5.222 00:0d:3a:5a:75:1a 5.0.0-1020-azure 100 13.64.117.146 00:0d:3a:5a:74:da 5.0.0-1020-azure 100 13.64.117.17 00:0d:3a:37:67:0e 5.0.0-1020-azure 100 13.91.6.207 00:0d:3a:3a:cc:2c 5.0.0-1020-azure 100 40.78.30.129 00:0d:3a:36:6e:eb 5.0.0-1020-azure 100 104.210.36.238 00:0d:3a:5a:73:da 5.0.0-1020-azure 100 13.91.6.143 00:0d:3a:3a:c8:ec 5.0.0-1020-azure 100 40.83.249.58 00:0d:3a:3a:c0:7a 5.0.0-1020-azure 100 104.45.216.53 00:0d:3a:3b:8a:55 5.0.0-1020-azure 100 104.210.42.18 00:0d:3a:5a:73:5c 5.0.0-1020-azure 100 40.78.27.21 00:0d:3a:3a:c9:19 5.0.0-1020-azure 100 40.83.252.110 00:0d:3a:5a:79:93 5.0.0-1020-azure 100 13.64.119.204 00:0d:3a:5a:7e:bc 5.0.0-1020-azure 100 104.210.34.4 00:0d:3a:31:18:ee 5.0.0-1020-azure 250 138.91.197.202 00:0d:3a:31:1d:c1 5.0.0-1020-azure 94 [ HANG ] 138.91.196.241 00:0d:3a:31:15:2b 5.0.0-1020-azure 250 104.210.33.44 00:0d:3a:31:16:f3 5.0.0-1020-azure 250 40.83.248.76 00:0d:3a:32:af:a7 5.0.0-1020-azure 250 40.83.253.204 00:0d:3a:32:ba:09 5.0.0-1020-azure 250 168.62.202.8 00:0d:3a:32:a0:11 5.0.0-1020-azure 250 40.83.249.8 00:0d:3a:32:bd:ce 5.0.0-1020-azure 250 40.83.249.93 00:0d:3a:32:b7:32 5.0.0-1020-azure 250 40.83.253.187 00:0d:3a:32:b9:cd 5.0.0-1020-azure 250 23.99.9.88 00:0d:3a:37:96:c9 5.0.0-1020-azure 250 104.40.29.184 00:0d:3a:36:9f:e0 5.0.0-1020-azure 250 137.135.40.122 00:0d:3a:36:9f:eb 5.0.0-1020-azure 250 137.135.49.43 00:0d:3a:36:92:aa 5.0.0-1020-azure 250 138.91.251.8 00:0d:3a:37:9e:ef 5.0.0-1020-azure 250 13.64.146.175 00:0d:3a:31:de:ee 5.0.0-1020-azure 500 104.42.23.145 00:0d:3a:31:da:d7 5.0.0-1020-azure 500 104.42.29.99 00:0d:3a:31:d4:4f 5.0.0-1020-azure 500 40.78.106.12 00:0d:3a:31:d9:8a 5.0.0-1020-azure 500 138.91.233.210 00:0d:3a:31:df:84 5.0.0-1020-azure 500 104.42.25.30 00:0d:3a:31:c9:a4 5.0.0-1020-azure 500 13.64.150.69 00:0d:3a:31:dd:47 5.0.0-1020-azure 321 [ HANG ] 104.42.25.23 00:0d:3a:31:d3:c9 5.0.0-1020-azure 500 104.42.24.176 00:0d:3a:31:d8:36 5.0.0-1020-azure 500 13.64.79.133 00:0d:3a:31:d5:b4 5.0.0-1020-azure 500 104.42.29.146 00:0d:3a:31:de:73 5.0.0-1020-azure 500 104.42.19.191 00:0d:3a:31:d4:78 5.0.0-1020-azure 500 40.118.249.118 00:0d:3a:31:db:20 5.0.0-1020-azure 500 40.112.219.112 00:0d:3a:31:dc:da 5.0.0-1020-azure 500 104.42.17.115 00:0d:3a:31:d3:21 5.0.0-1020-azure 500 40.83.212.164 00:0d:3a:5a:ab:48 5.0.0-1020-azure 500 52.160.123.4 00:0d:3a:36:0d:6a 5.0.0-1020-azure 500 52.160.83.37 00:0d:3a:5a:ab:79 5.0.0-1020-azure 500 52.160.122.92 00:0d:3a:36:00:4c 5.0.0-1020-azure 500 52.160.122.71 00:0d:3a:36:0f:bd 5.0.0-1020-azure 500 52.160.123.12 00:0d:3a:36:04:39 5.0.0-1020-azure 500 104.210.60.218 00:0d:3a:36:b6:25 5.0.0-1020-azure 500 52.160.123.221 00:0d:3a:5a:a9:a3 5.0.0-1020-azure 500 52.160.123.234 00:0d:3a:5a:a7:1c 5.0.0-1020-azure 500 104.210.61.139 00:0d:3a:37:b7:84 5.0.0-1020-azure 500 104.210.61.43 00:0d:3a:36:b5:96 5.0.0-1020-azure 500 40.83.212.185 00:0d:3a:5a:af:9c 5.0.0-1020-azure 500 52.160.82.111 00:0d:3a:5a:a9:a9 5.0.0-1020-azure 500 52.160.82.167 00:0d:3a:5a:a7:17 5.0.0-1020-azure 500 104.210.61.135 00:0d:3a:36:b3:97 5.0.0-1020-azure 500 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822118 Title: Kernel Panic while rebooting cloud instance To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1822118/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs