總結：
cassandra-3.10依賴java 8，推薦使用jdk1.8最新版本；
爲了不與現有系統JDK版本配置衝突，可以在cassandra.in.sh 中設置JAVA_HOME，使cassandra使用自己的環境變量
建立start-server腳本：cassandra -p ./cassandra/pid，（以root權限運行時需要-R）
更改stop-server腳本：kill `cat ~/.cassandra/pid` && rm -f ~/.cassandra/pid
#機器自帶openjdk-1.8.0，但已經爲現有業務安裝了jdk7 http://dressame.blog.51cto.com/12551541/1896275
1、tar -zxf apache-cassandra-3.10-bin.tar.gz
2、配置環境變量
cd /etc/profile.d
vim cassandra.sh
CASSANDRA_HOME=/opt/deploy/apache-cassandra-3.10
PATH=$PATH:$CASSANDRA_HOME/bin
3、執行cassandra命令，報錯提示需要jdk1.8.0_u40
配置使用openjdk-1.8.0：
cd /opt/deploy/apache-cassandra-3.10/bin
vim cassandra.in.sh
#添加
JAVA_HOME=/usr/lib/jvm/java-openjdk
4、執行cassandra命令，提示
Running Cassandra as root user or group is not recommended - please start Cassandra using a different system user.
If you really want to force running Cassandra as root, use -R command line option.
5、cassandra -R，提示WARN
......
WARN [main] 2017-05-09 11:07:07,068 StartupChecks.java:124 - jemalloc shared library could not be preloaded to speed up memory allocations
WARN [main] 2017-05-09 11:07:07,068 StartupChecks.java:157 - JMX is not enabled to receive remote connections. Please see cassandra-env.sh for more info.
WARN [main] 2017-05-09 11:07:07,069 StartupChecks.java:194 - OpenJDK is not recommended. Please upgrade to the newest Oracle Java release
INFO [main] 2017-05-09 11:07:07,070 SigarLibrary.java:44 - Initializing SIGAR library
WARN [main] 2017-05-09 11:07:07,079 SigarLibrary.java:174 - Cassandra server running in degraded mode. Is swap disabled? : false, Address space adequate? : true, nofile limit adequate? : false, nproc limit adequate? : true
#cassandar會自動新建data內的子目錄
WARN [main] 2017-05-09 11:07:07,085 StartupChecks.java:236 - Directory ./../data/data doesn't exist
WARN [main] 2017-05-09 11:07:07,087 StartupChecks.java:236 - Directory ./../data/commitlog doesn't exist
WARN [main] 2017-05-09 11:07:07,088 StartupChecks.java:236 - Directory ./../data/saved_caches doesn't exist
WARN [main] 2017-05-09 11:07:07,088 StartupChecks.java:236 - Directory /opt/deploy/apache-cassandra-3.10/bin/./../data/hints doesn't exist
......
6、安裝jdk1.8
rpm -i jdk-8u131-linux-x64.rpm
rm -f /usr/java/default
#默認jdk依舊設置爲1.7
ln -sv /usr/java/jdk1.7.0_80 /usr/java/default
vim cassandra.in.sh
JAVA_HOME=/usr/java/jdk-1.8.0_131
7、cd ~
cassandra -p ./cassandra/pid -R
8、關閉cassandra的命令，依據stop-server的提示
將stop-server內容改爲
kill `cat ~/.cassandra/pid`
rm -f ~/.cassandra/pid
9、建立start-server
vim start-server
cassandra -p ./cassandra/pid -R
chmod 755 start-server
以後就可以start-server，stop-server搭配使用了