Log:hivelog4j.properties not found的问题20121030本地测试集群

 

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     终于可以调试Hive源码了.首当其冲的就报了这个错误:

FAILED: Error in metadata: java.lang.IllegalArgumentException: URI:  does not have a scheme
2011-09-22 11:54:57,890 ERROR [main] session.SessionState$LogHelper(343): FAILED: Error in metadata: java.lang.IllegalArgumentException: URI:  does not have a scheme
org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.IllegalArgumentException: URI:  does not have a scheme
    at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1028)
    at org.apache.hadoop.hive.ql.metadata.Hive.databaseExists(Hive.java:1013)
    at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:1691)
    at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:289)
    at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:130)
    at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
    at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1063)
    at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:900)
    at org.apache.hadoop.hive.ql.Driver.run(Driver.java:748)
    at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:164)
    at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:241)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:456)
Caused by: java.lang.IllegalArgumentException: URI:  does not have a scheme
    at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:127)
    at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:1855)
    at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:1865)
    at org.apache.hadoop.hive.ql.metadata.Hive.getDatabase(Hive.java:1024)
    ... 11 more

  然后启动后在控制台也收到这样一条Log:hive-log4j.properties not found

    源码调下来,发现是Hive在加载配置文件如hive-default.xml,hive-log4j.properties时采用这种方法:

private ClassLoader classLoader;
 {
   classLoader = Thread.currentThread().getContextClassLoader();
   if (classLoader == null) {
     classLoader = Configuration.class.getClassLoader();
   }
 }

   然后获取hive-default.xml等是采用如下代码:

URL hconfurl = getClassLoader().getResource("hive-default.xml");

   这样在jar中运行是没有问题的,但放到Eclipse里运行的话,获取的路径就会有出路了.现在来验证下:

package com.guoyun.hive.study.basic;

public class PrintSourcePath {

    /**
     * @param args
     */
    public static void main(String[] args) {
        ClassLoader loader=Thread.currentThread().getContextClassLoader();
        System.out.println("Run path:"+loader.getResource("").getPath());
        // hive-default.xml
        System.out.println("hive-default.xml path:"+loader.getResource("hive-default.xml").getPath());

    }

}

    控制台输出如下：

    Run path:/home/hadoop/workspace/hive-0.7.0/bin/
    Exception in thread "main" java.lang.NullPointerException
    at com.guoyun.hive.study.basic.PrintSourcePath.main(PrintSourcePath.java:12)

   在获取hive-default.xml文件源时报来空指针异常,现在将hive_home/conf下到文件拷到hive/bin下，再运行这个类就不会报错了，我的运行结果如下:

    Run path:/home/hadoop/workspace/hive-0.7.0/bin/

    hive-default.xml path:/home/hadoop/workspace/hive-0.7.0/bin/hive-default.xml

  之后再来调试Hive源码，Log:hive-log4j.properties not found已经不出现了。同时也没这个错误来。该问题解决！但接下来又发生了其他错误。。。一步步解决吧。