hbase 0.2.1 failing to start

[Dru Jensen]

HBase was not responding to Thrift requests so I tried to restart but  
it still looks frozen.  I am seeing several error messages in the  
hmaster logs after I attempted to restart hbase:

2008-09-29 12:55:23,744 ERROR  
org.apache.hadoop.hbase.regionserver.HRegionServer: error opening  
region {table},{key},1222453917858
java.io.IOException: Premeture EOF from inputStream
        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:100)
	at org.apache.hadoop.dfs.DFSClient 
$BlockReader.readChunk(DFSClient.java:967)
	at  
org 
.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.java: 
236)

and:

2008-09-29 12:58:50,067 ERROR  
org.apache.hadoop.hbase.regionserver.HRegionServer: error opening  
region {table},{key},1222453917858
java.io.IOException: Could not obtain block: blk_-2905695662732817278

Any ideas what would cause this? Can I recover this data?

HBase 0.2.1
Hadoop 0.17.2.1
Cluster of 3 boxes, dfs replication = 1.