Caused by: java.lang.IllegalArgumentException: Wrong FS: hdfs:// :9000/ expected: hdfs:// :9000

（向原文作者致敬）

在hive中，执行查询时，报错如下
hive> select * from person;
FAILED: Hive Internal Error: java.lang.RuntimeException(Error while making MR scratch directory - check filesystem config (null))
java.lang.RuntimeException: Error while making MR scratch directory - check filesystem config (null)
at org.apache.hadoop.hive.ql.Context.getMRScratchDir(Context.java:196)
at org.apache.hadoop.hive.ql.Context.getMRTmpFileURI(Context.java:247)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.getMetaData(SemanticAnalyzer.java:905)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:6599)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:238)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:340)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:736)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:209)
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)
Caused by: java.lang.IllegalArgumentException: Wrong FS: hdfs://219.239.88.86:9000/tmp/hive-hadoop/hive_2012-05-23_15-45-22_363_5400249889198953930, expected: hdfs://counterdb.yesky.com:9000
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:410)
at org.apache.hadoop.hdfs.DistributedFileSystem.checkPath(DistributedFileSystem.java:106)
at org.apache.hadoop.fs.FileSystem.makeQualified(FileSystem.java:322)
at org.apache.hadoop.hdfs.DistributedFileSystem.makeQualified(DistributedFileSystem.java:123)
at org.apache.hadoop.hive.ql.Context.getScratchDir(Context.java:146)
at org.apache.hadoop.hive.ql.Context.getMRScratchDir(Context.java:190)
... 14 more

[hadoop@Yy86 ~]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 Yy86 localhost.localdomain localhost
219.239.88.86 hadoop.master
219.239.88.228 hadoop.slave
进入hadoop的安装目录conf下
[hadoop@Yy86 conf]$ vi core-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://219.239.88.86:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hadoop/tmp1</value>
</property>
</configuration>
<value>hdfs://219.239.88.86:9000</value>==》改成以下内容

[hadoop@Yy86 conf]$ vi core-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop.master:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hadoop/tmp1</value>
</property>
</configuration>

重启hadoop，一切正常。