add auto retry in RedisSink
throw JedisConnectionException when retry limit exceeds
redissink should fail input when retryOps fail
Merge pull request #1 from LantaoJin/master

add BlackholeBlockingQueueSport
extract fetcher for spout
Merge pull request #3 from LantaoJin/master

Refactor and update version, code review by Xinchun.Wang
Merge pull request #4 from LantaoJin/master

change version to 1.2-SNAPSHOT
extract fetcher for spout
merge conflict
add cat monitor
add cat monitor and restart topology
remove bin folder
remove class files
Merge pull request #5 from xinchun-wang/master

add cat monitor