> Source: [sk102553](https://support.checkpoint.com/results/sk/sk102553)

# sk102553 - Intermittent traffic outage on Security Gateway with enabled NetFlow

| Property | Value |
|----------|-------|
| Solution ID | sk102553 |
| Date Created | 2014-09-17 |
| Last Modified | 2016-02-04 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * End-users on the network experienced traffic outage for several minutes.
  After several more minutes, the traffic started to flow again (without any troubleshooting steps).  

  The issue reoccurred later that day.

* */var/log/messages* file showed the following Call Trace during the time of the issue:

  ```
  
  kernel: BUG: scheduling while atomic: netflowd/0x00000100/...
  kernel: 
  kernel: Call Trace: 
  kernel: [...] thread_return+...
  kernel: [...] :fw_0:fwlinux_nfipout+...
  kernel: [...] cache_grow+...
  kernel: [...] ip_finish_output+...
  kernel: [...] ip_finish_output+...
  kernel: [...] cache_alloc_refill+...
  kernel: [...] schedule_timeout+...
  kernel: [...] prepare_to_wait+...
  kernel: [...] sock_alloc_send_skb+...
  kernel: [...] autoremove_wake_function+...
  kernel: [...] ip_append_data+...
  kernel: [...] ip_generic_getfrag+...
  kernel: [...] udp_sendmsg+...
  kernel: [...] sock_sendmsg+...
  kernel: [...] autoremove_wake_function+...
  kernel: [...] lock_timer_base+...
  kernel: [...] :simmod:netflow_9_make_pkt+...
  kernel: [...] del_timer_sync+...
  kernel: [...] kernel_sendmsg+...
  kernel: [...] :simmod:sim_netflow_xmit_pkt+...
  kernel: [...] :simmod:sim_netflow_daemon+...
  kernel: [...] autoremove_wake_function+...
  kernel: [...] :simmod:netflow_conf_write+...
  kernel: [...] proc_file_write+...
  kernel: [...] vfs_write+...
  kernel: [...] sys_write+...
  kernel: [...] sysenter_do_call+...
  ```

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