Major Description
In extraordinary circumstances (eg. S3 outages), calling S3FileSystem functions will throw NullPointerExceptions when trying to read from the filesystem. I've traced this down to calls to Jets3tFileSystemStore.get().
Both get() functions catch an S3ServiceException, and check its error code using a string comparison. However, the underlying libs3t library will sometimes produce an exception with a null error code string. This results in an NPE that propagates all the way to the S3FileSystem, and to the caller.
To fix this, Jets3tFileSystemStore lines 196 and 212 should be changed from:
if (e.getS3ErrorCode().equals("NoSuchKey")) {
to:
if ("NoSuchKey".equals(e.getS3ErrorCode())) {