Update UnderFileSystemHdfs class to throw IOException instead of Throwables.propagate(te)

Per discussion in ML, update UnderFileSystemHdfs class to throw IOException as is instead of wrapping it as runtime.

This will follow the abstract method definitions that could throw IOException instead.
k


On Fri, Jul 25, 2014 at 3:36 PM, Henry Saputra <notifications@github.com>
wrote:

> In core/src/main/java/tachyon/UnderFileSystemHdfs.java:
>
> >      IOException te = null;
> >      int cnt = 0;
> >      while (cnt < MAX_TRY) {
> >        try {
> >          if (mFs.exists(new Path(path))) {
> > +          LOG.debug("Trying to create existing directory at " + path);
>
> Most of debug logging is not protected by isDebug, will send separate PR
> to address it.
>
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> <https://github.com/amplab/tachyon/pull/304/files#r15427846>.
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