HBase 0.90.0 cannot be put more data after running hours

[Schubert Zhang]

I am using 0.90.0 (8 RS + 1Master)
and the HDFS is CDH3b3

During the first hours of running, I puts many (tens of millions entites,
each about 200 bytes), it worked well.

But then, the client cannot put more data.

I checked all log files of hbase, no abnormal is found, I will continue to
check this issue.

It seems related to ZooKeeper......