运行spark-shell 或者scala命令，出现以下错误：
Welcome to Scala version 2.10.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_66).
Type in expressions to have them evaluated.
Type :help for more information.
scala> [init] error: error while loading <root>, error in opening zip file
Failed to initialize compiler: object scala.runtime in compiler mirror not found.
** Note that as of 2.8 scala does not assume use of the java classpath.
** For the old behavior pass -usejavacp to scala, or if using a Settings
** object programatically, settings.usejavacp.value = true.解决方法：删除下面以点开头的包
cd /usr/lib/jvm/jdk1.8.0_66/jre/lib/ext/
root@ha0:/usr/lib/jvm/jdk1.8.0_66/jre/lib/ext# ls -la
total 25676
drwxrwxr-x 2 501 root 4096 Feb 3 15:49 .
drwxrwxr-x 15 501 root 4096 Feb 3 15:49 ..
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._cldrdata.jar
-rwxrwxr-x 1 501 root 3860522 Oct 7 08:36 cldrdata.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._dnsns.jar
-rwxrwxr-x 1 501 root 8286 Oct 7 08:36 dnsns.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._jaccess.jar
-rwxrwxr-x 1 501 root 44516 Oct 7 08:36 jaccess.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 04:00 ._jfxrt.jar
-rwxrwxr-x 1 501 root 18467564 Oct 7 04:00 jfxrt.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._localedata.jar
-rwxrwxr-x 1 501 root 1178935 Oct 7 08:36 localedata.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:37 ._meta-index
-rwxrwxr-x 1 501 root 1269 Oct 7 08:37 meta-index
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._nashorn.jar
-rwxrwxr-x 1 501 root 2015935 Oct 7 08:36 nashorn.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._sunec.jar
-rwxrwxr-x 1 501 root 39771 Oct 7 08:36 sunec.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._sunjce_provider.jar
-rwxrwxr-x 1 501 root 278680 Oct 7 08:36 sunjce_provider.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._sunpkcs11.jar
-rwxrwxr-x 1 501 root 250826 Oct 7 08:36 sunpkcs11.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:36 ._zipfs.jar
-rwxrwxr-x 1 501 root 68849 Oct 7 08:36 zipfs.jar
root@ha0:/usr/lib/jvm/jdk1.8.0_66/jre/lib/ext# rm ._*.jar
root@ha0:/usr/lib/jvm/jdk1.8.0_66/jre/lib/ext# ls -la
total 25636
drwxrwxr-x 2 501 root 4096 Feb 25 18:01 .
drwxrwxr-x 15 501 root 4096 Feb 3 15:49 ..
-rwxrwxr-x 1 501 root 3860522 Oct 7 08:36 cldrdata.jar
-rwxrwxr-x 1 501 root 8286 Oct 7 08:36 dnsns.jar
-rwxrwxr-x 1 501 root 44516 Oct 7 08:36 jaccess.jar
-rwxrwxr-x 1 501 root 18467564 Oct 7 04:00 jfxrt.jar
-rwxrwxr-x 1 501 root 1178935 Oct 7 08:36 localedata.jar
-rwxrwxr-x 1 501 staff 176 Oct 7 08:37 ._meta-index
-rwxrwxr-x 1 501 root 1269 Oct 7 08:37 meta-index
-rwxrwxr-x 1 501 root 2015935 Oct 7 08:36 nashorn.jar
-rwxrwxr-x 1 501 root 39771 Oct 7 08:36 sunec.jar
-rwxrwxr-x 1 501 root 278680 Oct 7 08:36 sunjce_provider.jar
-rwxrwxr-x 1 501 root 250826 Oct 7 08:36 sunpkcs11.jar
-rwxrwxr-x 1 501 root 68849 Oct 7 08:36 zipfs.jar
root@ha0:/usr/lib/jvm/jdk1.8.0_66/jre/lib/ext# scala