HBase 1.1.2.2.6.0.3-8 TTL设置过之后，无法显示重置为FOREVER
参考：https://www.cnblogs.com/zpb2016/p/12649831.html
一个解决办法见如上链接。
1.如果想重置TTL为'FOREVER'怎么做？
答：HBase TTL 最大值为INT最大值 2147483647，只需将TTL设为该整数即可。
==========================问题=======================================================
1.在HBase 1.1.2 hdp2.6.0.3-8 版本上，安装opentsdb时出现如下问题：
env COMPRESSION=NONE HBASE_HOME=/usr/hdp/2.6.0.3-8/hbase ./src/create_table.sh
TTL输入字符串：“FOREVER”错误
2.查看opentsdb的create_table.sh脚本，发现如下：
此时安装的是官方的最新的opentsdb2.4，不确定是否是hbase版本过低的问题引起的（手里也没有HBASE2.x的环境）
3.尝试建表后，手动修改ttl：
hbase(main):004:0> alter 'wkz:test',{NAME => 'f', TTL => "FOREVER"}
ERROR: For input string: "FOREVER"
hbase(main):005:0> alter 'wkz:test',{NAME => 'f', TTL => 1111}
Updating all regions with the new schema...
0/1 regions updated.
1/1 regions updated.
Done.
0 row(s) in 3.6420 seconds
hbase(main):003:0> describe 'wkz:test'
Table wkz:test is ENABLED
wkz:test
COLUMN FAMILIES DESCRIPTION
{NAME => 'f', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NO
NE', TTL => '11111 SECONDS (3 HOURS 5 MINUTES 11 SECONDS)', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKS
IZE => '65536', REPLICATION_SCOPE => '0'}
1 row(s) in 0.0340 seconds发现直接指定TTL => "FOREVER"还是不行
4.最后按照链接方法尝试后，成功
hbase(main):006:0> alter 'wkz:test',{NAME => 'f', TTL => 2147483647}
Updating all regions with the new schema...
0/1 regions updated.
1/1 regions updated.
Done.
0 row(s) in 3.8240 seconds
hbase(main):007:0> describe 'wkz:test'
Table wkz:test is ENABLED
wkz:test
COLUMN FAMILIES DESCRIPTION
{NAME => 'f', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NO
NE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
1 row(s) in 0.0530 seconds
5.遗留问题，hbase ttl在高版本是否可以直接 指定TTL => "FOREVER"，不然为啥opentsdb官网的脚本是这样写的。。