`ssh` connections to `tools-webgrid-lighttpd-1412.tools.eqiad.wmflabs` hang and then fail:
```
[tim@passepartout ~]$ ssh tools-webgrid-lighttpd-1412.tools.eqiad.wmflabs
ssh_exchange_identification: Connection closed by remote host
[tim@passepartout ~]$
```
The console log at https://wikitech.wikimedia.org/wiki/Special:NovaInstance shows:
```
[…]
Cloud-init v. 0.7.5 finished at Tue, 19 Jan 2016 14:32:10 +0000. Datasource DataSourceOpenStack [net,ver=2]. Up 17.00 seconds
Ubuntu 14.04.3 LTS tools-webgrid-lighttpd-1412 ttyS0
tools-webgrid-lighttpd-1412 login: [120960.360155] INFO: task jbd2/vda1-8:174 blocked for more than 120 seconds.
[120960.369005] Not tainted 3.13.0-62-generic #102-Ubuntu
[120960.370015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121080.368243] INFO: task jbd2/vda1-8:174 blocked for more than 120 seconds.
[121080.373626] Not tainted 3.13.0-62-generic #102-Ubuntu
[121080.374888] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121200.376091] INFO: task jbd2/vda1-8:174 blocked for more than 120 seconds.
[121200.380392] Not tainted 3.13.0-62-generic #102-Ubuntu
[121200.381395] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121200.383347] INFO: task jbd2/dm-1-8:336 blocked for more than 120 seconds.
[121200.384239] Not tainted 3.13.0-62-generic #102-Ubuntu
[121200.384947] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121200.386097] INFO: task cron:7934 blocked for more than 120 seconds.
[121200.386944] Not tainted 3.13.0-62-generic #102-Ubuntu
[121200.387911] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121200.389199] INFO: task cron:7935 blocked for more than 120 seconds.
[121200.389997] Not tainted 3.13.0-62-generic #102-Ubuntu
[121200.390949] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121320.392238] INFO: task jbd2/vda1-8:174 blocked for more than 120 seconds.
[121320.395941] Not tainted 3.13.0-62-generic #102-Ubuntu
[121320.396562] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121320.397566] INFO: task jbd2/dm-1-8:336 blocked for more than 120 seconds.
[121320.398329] Not tainted 3.13.0-62-generic #102-Ubuntu
[121320.399177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121320.400201] INFO: task kworker/u8:0:29826 blocked for more than 120 seconds.
[121320.400952] Not tainted 3.13.0-62-generic #102-Ubuntu
[121320.401538] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[121320.402498] INFO: task cron:7934 blocked for more than 120 seconds.
[121320.403244] Not tainted 3.13.0-62-generic #102-Ubuntu
[121320.403833] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
```