Github user d2r commented on the pull request:
https://github.com/apache/storm/pull/845#issuecomment-159406843
backtype.storm.utils.Utils
```
535 try {
536 ReadableBlobMeta metadata = cb.getBlobMeta(key);
537 nimbusBlobVersion = metadata.get_version();
538 } catch (AuthorizationException | KeyNotFoundException exp) {
539 throw exp;
540 }
```
Don't need `try ... catch` if we just throw whatever we catch.
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