Monitoring, Management & Location Tracking

Airwave web interface down

Aruba Employee
Problem:

 

What to do when Airwave web interface is down with ap_get_server_version error



Diagnostics:

 

Below are couple of things we could check to further analyze this issue,

Run the below command to watch the daemons and see the httpd daemon failing,

# wd

 

Check the httpd error log under /var/log/httpd. We should be seeing the below error message in this case,

Tue Mar 1 01:09:21 2016] bootstrap.pl(22960): Starting... 
ap_get_server_banner() not available until httpd/2.2.4 falling back to ap_get_server_version() at /opt/airwave/lib64/perl5/5.10.1/x86_64-linux-thread-multi/XSLoader.pm line 94. 
ap_get_server_description() not available until httpd/2.2.4 falling back to ap_get_server_version() at /opt/airwave/lib64/perl5/5.10.1/x86_64-linux-thread-multi/XSLoader.pm line 94. 
[Tue Mar 1 01:09:21 2016] bootstrap.pl(22960): Not the last run yet (PPID: 22959) 
[Tue Mar 1 01:09:41 2016] bootstrap.pl(22982): Starting... 
[Tue Mar 1 01:10:02 2016] bootstrap.pl(23012): Starting... 
ap_get_server_banner() not available until httpd/2.2.4 falling back to ap_get_server_version() at /opt/airwave/lib64/perl5/5.10.1/x86_64-linux-thread-multi/XSLoader.pm line 94. 
ap_get_server_description() not available until httpd/2.2.4 falling back to ap_get_server_version() at /opt/airwave/lib64/perl5/5.10.1/x86_64-linux-thread-multi/XSLoader.pm line 94. 
[Tue Mar 1 01:10:02 2016] bootstrap.pl(23012): Not the last run yet (PPID: 23011) 
[Tue Mar 1 01:10:22 2016] bootstrap.pl(23021): Starting... 
[Tue Mar 1 01:10:42 2016] bootstrap.pl(23053): Starting... 

 

Check the low_level_service watcher log and we would see the below message,

Mon May 13 10:01:34 2013: Couldn't find any apache processes; restarting.
Stopping httpd: [FAILED]
Starting httpd: [  OK  ]
Stopping Pound: [FAILED]
Apache uptime (PID: 2997) appears to be negative (-32449 seconds), perhaps the system clock has jumped backwards at /usr/local/airwave/lib/perl/Mercury/Daemon/LowLevelServiceWatcher.pm line 151.
Mon May 13 10:02:13 2013: Couldn't find any apache processes; restarting.

Stopping httpd: [FAILED]
Starting httpd: [  OK  ]
Stopping Pound: [FAILED]
Apache uptime (PID: 3022) appears to be negative (-32449 seconds), perhaps the system clock has jumped backwards at /usr/local/airwave/lib/perl/Mercury/Daemon/LowLevelServiceWatcher.pm line 151.



Solution

We mainly see this issue when the time on the server is not correct. We can execute the below command on Airwave CLI to check the time,

# date

 

We can have the date and time updated on the server using the below commands,

# cd install

# ./time-setup

 

Set the right time and date. Once done we can also sync the server with the NTP server in the network using the below command,

Edit the /etc/ntp.conf file,

 

# vi /etc/ntp.conf

 

Add the ntp servers to the list and save. Restart the ntp services using the below command,

 

# service ntpd restart

 

Finally disable and enable to amp services using the below commands,


# amp_disable

# amp_enable -now 

 

Wait for 5-6 minutes for the daemons to start up and you should be good to go.

Version history
Revision #:
2 of 2
Last update:
‎03-18-2017 11:49 AM
Updated by:
 
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