Create table threw NullPointerException

[Gaojinchao]

It happened in latest branch 0.90. but I can't reproduce it.

It seems using api getHRegionInfoOrNull is better or check the input parameter 
before call getHRegionInfo.

Code:
  public static Writable getWritable(final byte [] bytes, final Writable w)
  throws IOException {
    return getWritable(bytes, 0, bytes.length, w);
  }
return getWritable(bytes, 0, bytes.length, w);  // It seems input parameter 
bytes is null

logs:
11/07/15 10:15:42 INFO zookeeper.ClientCnxn: Socket connection established to 
C4C3.site/157.5.100.3:2181, initiating session
11/07/15 10:15:42 INFO zookeeper.ClientCnxn: Session establishment complete on 
server C4C3.site/157.5.100.3:2181, sessionid = 0x2312b8e3f700002, negotiated 
timeout = 180000
[INFO] Create : ufdr111 222!
[INFO] Create : ufdr111 start!
java.lang.NullPointerException
        at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
        at 
org.apache.hadoop.hbase.util.Writables.getHRegionInfo(Writables.java:119)
        at 
org.apache.hadoop.hbase.client.HBaseAdmin$1.processRow(HBaseAdmin.java:306)
        at 
org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:190)
        at 
org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:95)
        at 
org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:73)
        at 
org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:325)
        at createTable.main(createTable.java:96)