Odd failure and status reporting of an --on_failure cmd

[sb10]

mkdir -p $TMPDIR/tmp1/logs
touch $TMPDIR/tmp1/logs/1
--on_failure  "[{\"run\":\"cd ../tmp; (find tmp* -path '*/logs/*' -print0; find tmp* -name '*time*' -print0; find tmp* -name '*wrapper.log' -print0) | tar --null --no-recursion -zacf /dev/shm/time_and_log.tar.gz --files-from -; s3cmd put /dev/shm/time_and_log.tar.gz s3://sb10/\"}]"
fails for unknown reason
--on_failure  "[{\"run\":\"cd ../tmp; (find tmp* -path '*/logs/*' -print0; find tmp* -name '*time*' -print0; find tmp* -name '*wrapper.log' -print0) > /dev/shm/time_and_log.txt && s3cmd put /dev/shm/time_and_log.txt s3://sb10/\"}]"
works

When I had the two jobs running, if I clicked Behaviours button of t1 job, I saw commands I gave to cgpwgs job