Got answer for above from Customer Support:
"
This is because if a stream's autoDJ is set to "Permitted and enabled", and Centova Cast detects that an live DJ has used the "Deactivate source" option to temporarily turn off the autoDJ, but no source is connected, Centova Cast to automatically restart the autoDJ. This can be useful in case a live DJ disconnects and forgets to reactivate the autoDJ.
If you would like to disable this, you should simply edit the file /usr/local/centovacast/etc/centovacast.conf and change AUTODJ_FAILSAFE= to "false" (and restart Centova Cast after that:
/etc/init.d/centovacast restart
Regards,
Alexiu
"
Just in case if someone would like to find out what is going on.
But I found something else, data returned by "version" action of System API is different fromresult in documentation
{
"type": "success",
"response": {
"data": {
"web": {
"version": "3.0.6",
"accounts": 18,
"activeaccounts": 17,
"memfree": 5311606784,
"memtotal": 8219455488,
"memcached": 471158784,
"swapfree": 2006958080,
"swaptotal": 2006958080,
"buffers": 49565696,
"memavail": 7698731008,
"cpuload": 0.66,
"uptime": 3000483,
"machine": "Quad-Core AMD Opteron(tm) Processor 1385 @ 2.70GHz x86-64",
"osbrief": "Linux",
"osdetails": "2.6.32-220.13.1.el6.x86_64",
"other": {
"Kernel": ["s", "Linux version 2.6.32-220.13.1.el6.x86_64 (mockbuild@c6b6.bsys.dev.centos.org) (gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) ) #1 SMP Tue Apr 17 23:56:34 BST 2012"],
"Load (1m)": ["f", 0.4200],
"Load (5m)": ["f", 0.6600],
"Load (15m)": ["f", 0.5700]
}
}
},
"message": "Centova Cast v3.0.6"
}
}