Cassandra timeout during read query?

General Discussion
8

I know it is against the rules, but I duplicate part of this post into this Developers forum, considering my coding question may be more appropriate there.

For the third consecutive week, my periodic history download SmartApp failed to execute.
The only difference is that this time, running it by hand from the IDE, I got an “error” notification in the log :

java.util.concurrent.TimeoutException: Execution time exceeded 20 app execution seconds: 122413839485071 @ line 112

which resulted in the usual IDE return code :

java.lang.reflect.UndeclaredThrowableException @ line 112

I wonder if somehow, the way I wrote my lines 111-112 in my “JJ’s Test2” SmartApp does not result in parallel threads competiting for the same DB access, and when not getting through, then going into time-out.

111    for (tempSens in temperatureSensors) {
112        def allEvents = tempSens.eventsBetween(startDate, endDate, [max:2000]).findAll{it.name == "temperature"}

But if it is the case, how can I modify my code to force serial execution and avoid this concurrent.TimeoutException ?
Sorry if it is a dumb question, but Java/Groovy is not my forte… :frowning: