ERROR: org.apache.hadoop.hbase.PleaseHoldException:Master is initializing
今天想操作HBase的CRUD，启动HBase没有问题，但是使用hbase shell 命令转换到shell下时，使用比如命令，scan 't1'， create 'test','col' 等等都会出错，下面的是log里面的error部分：
ERROR: org.apache.hadoop.hbase.PleaseHoldException: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing
Here is some help for this command:
Create table; pass table name, a dictionary of specifications per
column family, and optionally a dictionary of table configuration.
Dictionaries are described below in the GENERAL NOTES section.
Examples:
hbase> create 't1', {NAME => 'f1', VERSIONS => 5}
hbase> create 't1', {NAME => 'f1'}, {NAME => 'f2'}, {NAME => 'f3'}
hbase> # The above in shorthand would be the following:
hbase> create 't1', 'f1', 'f2', 'f3'
hbase> create 't1', {NAME => 'f1', VERSIONS => 1, TTL => 2592000, BLOCKCACHE => true}
hbase> create 't1', 'f1', {SPLITS => ['10', '20', '30', '40']}
hbase> create 't1', 'f1', {SPLITS_FILE => 'splits.txt'}
hbase> # Optionally pre-split the table into NUMREGIONS, using
hbase> # SPLITALGO ("HexStringSplit", "UniformSplit" or classname)
hbase> create 't1', 'f1', {NUMREGIONS => 15, SPLITALGO => 'HexStringSplit'}
2014-01-14 02:19:52,285 ERROR org.apache.hadoop.hbase.master.HMasterCommandLine: Failed to start master
java.lang.RuntimeException: HMaster Aborted
at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:160)
at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:104)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:76)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2044)
Thu Jan 16 01:27:28 PST 2014 Stopping hbase (via master)
Thu Jan 16 01:34:58 PST 2014 Starting master on hadoop1
虽然看到了log文档里面的提示，但是由于是刚开始接触HBase，所以还是不知道如何下手。还是上网找各种资源，后面看到一个人的博客中提到这个问题按照他们的方法解决了，要注意
/etc/hosts里面的127.0.0.1是否是127.0.1.1，如果是的话，把他改过来就可以了。
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
虽然网上大家的版本各种各样，但是如果真的要学的话，还是官网上面的资料齐全点。