安裝好hadoop，然后安裝hbase啟動時出現問題，下面是報錯信息：
./hbase/bin/start-hbase.sh Error: Could not find or load main class org.apache.hadoop.hbase.util.HBaseConfTool Error: Could not find or load main class org.apache.hadoop.hbase.zookeeper.ZKServerTool starting master, logging to /usr/local/hbase/logs/hbase-root-master-localhost.out Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0 Error: Could not find or load main class org.apache.hadoop.hbase.master.HMaster starting regionserver, logging to /usr/local/hbase/logs/hbase-root-1-regionserver-localhost.out Error: Could not find or load main class org.apache.hadoop.hbase.regionserver.HRegionServer
分析：啟動時找不到類文件，搜了好多有的說是classpath環境變量問題，最后終於找到了問題所在，由於下的是src文件 即未編譯的文件，不能直接用，必須先編譯，重新下載bin文件 即二進制文件。
然后把需要的配置配好重新啟動
start-hbase.sh running master, logging to /usr/local/hadoop-2.6.5/hbase-1.4.9/logs/hbase--master-masternode.out Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0 slave1: running regionserver, logging to /usr/local/hadoop-2.6.5/hbase-1.4.9/logs/hbase-root-regionserver-slave1.out slave2: running regionserver, logging to /usr/local/hadoop-2.6.5/hbase-1.4.9/logs/hbase-root-regionserver-slave2.out
總結：這么簡單的問題也不會有人出現了，所以最后都沒搜到有效的問題解決方法，記錄一下引以為戒。