Remove the temporary cache folders created by MapDB before running local pipeline

[GHLgh]

When I am testing the code, sometime it will throw out the following exception JVM exception occurred: Header checksum broken. Store was not closed correctly, or is corrupted when I initialize local pipeline. And it can be solved by removing the annotation-cache file refer to pipeline's documentation

Should I check and remove the file before initializing local pipeline, or there is another way to solve it?
@danyaljj @bhargav

[danyaljj]

What version of the pipeline are we using?

[GHLgh]

3.1.1

[danyaljj]

The quick fix is to delete the cache, but it's not a good option.
The other (probably better) fix is to set transaction for the pipeline cache, just like how we did it for the client:
CogComp/cogcomp-nlp#392

[bhargav]

This also happened to Pavan a lot. Most time the JVM is not closed properly which causes this issue. One workaround is to have pipeline methods wrapped with a with-statement so that we can programmatically showdown the JVM. https://docs.python.org/2/library/contextlib.html