we have been random freezes in two asterisk systems more or less once a day last mounth.
In both system we are using a T100P card and a channel bank for local extensions (fxs) and h323 or sip (we have tried both with same results) voip gateways for FXO connectivity.
We used to have some SIP local clients using SER but those were taken out trying to fix the problem.
When the system freezes it keeps responding pings, and the channel bank doesn't loose T1 syncronism (the T1 led keeps green) but nothing else responds (no ssh connection, no console response).
Channel bank gives dialtone but no call can be made. In calls in progress the voice start do be more and more discontinous and then you hear only silence.
Once we reset the machine we don't find any error or warning in the logs (asterisk, kernel, messages, etc).
We are running sysstat in one of the systems and the only clear sympthom we see is the cpu usage raises to
100% just before we have to reset the system.
We are also capturing the console output to a file and we have noticed that (sometimes) there is a message like this in the console few lines before the end (not allways and not only, but...):
zt_get_index: Unable to get index, and nullok is not asserted
Does anybody knows if this message could be related to a system freeze
Thanks very much for any advice (and I'sorry for my poor english :( ) Luis
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