Checkmk Werk 15702: UNIX agents/mk_oracle: Validate termination of cached plugins

ID: 15702 Title: UNIX agents/mk_oracle: Validate termination of cached plugins Component: Checks & agents Level: 1 Class: Bug fix Version: 2.3.0b1 Many UNIX agents (linux, solaris, aix, freebsd, openwrt) as well as the mk_oracle agent plugin share the same functionality when running asynchronous/cached plugins:<br> After they got invoked as subprocesses, they will be watched by subsequent calls of the agent.<br> If they're still running after twice the cache time, they'll be terminated with <tt>kill -9</tt>. Previously, the termination has not been verified.<br> As a result, in situations where a processes couldn't be terminated with <tt>kill -9</tt>, the agent created new processes unlimitedly. This situation is now mitigated by checking for success after terminating a timed out process.<br> If the termination failed, no further process of the same plugin will be started.