java - How to wrap error trace inside Log.Severe() -

i using java.util.logging.logger logging on app-engine. have errors call e.printstacktrace(). except nothing when make call inside worker thread belongs task queue. within task queue, loggings done log.info() showing. question is: how wrap stack trace inside log.severe()? following shows address instead of trace itself:

private static final logger log = logger.getlogger(luceneworker.class.getname());  //later inside method log.severe(e.getstacktrace().tostring()); 

logger#severe(msg) convenience method logger#log(level.severe, msg) use method instead.

log.log(level.severe, "your log message", e);