我只是执行了一下这个代码
create temporary function strip as 'com.fatkun.Strip';
就抛出异常
hive> create temporary function strip as 'com.fatkun.Strip';
OK
Exception in thread "main" java.lang.NullPointerException
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:221)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:286)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:516)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:197)
从代码中看CliDriver.java:221，
原来和print header有关系。。。囧之前是为了打印header
默认这个是false的，所以把它去掉或者在hive-site置为false即可
<property>
<name>hive.cli.print.header</name>
<value>false</value>
</property>