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Good Evening Everyone,
I have an application running continuously on a TS-7200 which collects
data received on /dev/ttyAM1, parses it to a small degree and stores it
to a MySQL database on the device. I have the communications port set
up as non-blocking, and just poll the port with "read" to retrieve
data. Under normal circumstances, everything works fine.
I have another application which is called as a cron job every five
minutes. That application queries the data from the local database and
synchronizes it with a database on a remote MySQL server. The sync
application outputs only to a file and to the remote database. It
currently has no interaction between the first app, or any of the comm
ports.
The problem I'm finding is that every five minutes when the cron job
runs, something is causing the incoming data to essentially stop.
Nothing appears to recorded by the first application during the time
that the sync application is busy.
To the best of my ability to search, the comm ports are set correctly,
and as I said, the data collection application runs fine by itself.
Can anyone make some suggestions on where to go from here? Even if the
sync application caused the collection app to pause, I would have
expected the data to accumulate in the serial port buffer and be
available when the collection app resumed, but it does not. It just
seems to vanish.
I'd appreciate any suggestions.
Steve
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