在安装hadoop时，执行JPS出现下面错误
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[slave16]root@192.168.11.10:/tmp/hsperfdata_hdfs# jps
Error occurred during initialization of VM
java.lang.Error: Properties init: Could not determine current working directory.
? ? ? ? at java.lang.System.initProperties(Native Method)
? ? ? ? at java.lang.System.initializeSystemClass(System.java:1119)
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从错误知道JVM有问题，可以执行java -version命令：
[slave16]root@192.168.11.10:/tmp/hsperfdata_hdfs#??java -version
Error occurred during initialization of VM
java.lang.Error: Properties init: Could not determine current working directory.
? ? ? ? at java.lang.System.initProperties(Native Method)
? ? ? ? at java.lang.System.initializeSystemClass(System.java:1119)
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说明jdk路径没生效，执行source ~/.bashrc 命令，再次执行则能正常列出各程序
? ? ? ? ? ??
[slave16]root@192.168.11.10:~# source .bashrc
[slave16]root@192.168.11.10:~# java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
[slave16]root@10.223.137.83:~# jps
2355 -- process information unavailable
2543 -- process information unavailable
2491 -- process information unavailable
32419 -- process information unavailable
3665 Jps
30393 DataNode
2209 -- process information unavailable
2414 -- process information unavailable
1722 -- process information unavailable
31336 NodeManager
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安装hadoop时 执行jps命令Error occurred during initialization of VM
原文：http://daizj.iteye.com/blog/2212273