For exactly-once mode before flink-1.5, it needs the temp dir for spilling the
blocking buffers during checkpoint.
The temp dir is configured via `io.tmp.dirs` and the default value is
`java.io.tmpdir`. In your case, your temp dir prefix with `/tmp/` has some
problems (might be deleted), and yo
Hi;
I am trying to run the standard WordCount application under exactly once and
at-least once processing guarantees, respectively. I successfully run the
at-least once guarantee, however which running the exactly once guarantee, I
face the following exception
*Root exception:*
java.io.FileNotFound
