Return code of 127

[Nair]

Dear All,

Using Nagios 2.11 with mysql DB using ndo2db plugin.

I am getting below error and the Nagios server hangs down.

(Return code of 127 is out of bounds - plugin may be missing)

Nagiosstat output:

Used/High/Total Command Buffers:      2561 / 2561 / 32268
Used/High/Total Check Result Buffers: 0 / 0 / 4096

I could see more than 33,000 of NSCA process running where the command buffer is only 4096. 
Resolved the problem temprorly by increasing the command buffer to 35,000.

Still I am under assumption that Mysql query is the root cause of the issue.

Please share your ideas, if hav gone simialr issues.

Thank you.
Nair.

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