pkang on "copy from only load 10000 rows"

I have a single node Enterprise. use copy from to load data.

the csv has 1 million records.

the load went throught shows : 65536 rows imported in 1 minute and 7.852 seconds.
However when I do a count(*), it shows 10000.

the log shows something like:
"GCInspector.java (line 122) GC for ParNew: 276 ms for 1 collection, 629687648 used; max is 1052770304
MeteredFlusher.java (line 62) flushing high-traffic column family CFS (estimated 157413698 bytes)

but shows no error.

any ideas?