3

5 月，我创建了一个 Java servlet，它允许我在 Cosmos 上查询我的配置单元表。

在迁移到 cygnus 0.8.2 之前，我的数据被推送到一个名为“hostabee”的表中，我仍然可以从我的 Java 应用程序中查询该表。但是现在会自动为推送到 cosmos 的每个实体创建一个表。起初，我没有看到任何问题，这甚至使我的项目更简单。但我无法从我的应用程序中查询新表。相反，我得到了这个错误

java.sql.SQLException: Query returned non-zero code: 10, cause: FAILED: Error in semantic analysis: Line 1:15 Table not found 'guillaume_jourdain_hostabee_hives_a_hive_column'
        at org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:194)
        at HiveBasicClientServlet.doQuery(HiveBasicClientServlet.java:100)
        at HiveBasicClientServlet.demo(HiveBasicClientServlet.java:189)
        at HiveBasicClientServlet.doGet(HiveBasicClientServlet.java:44)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:701)

或者这个

java.sql.SQLException: Query returned non-zero code: 9, cause: FAILED: Execution Error, return code -101 from shark.execution.SparkTask
        at org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:194)
        at HiveBasicClientServlet.doQuery(HiveBasicClientServlet.java:100)
        at HiveBasicClientServlet.demo(HiveBasicClientServlet.java:189)
        at HiveBasicClientServlet.doGet(HiveBasicClientServlet.java:44)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:701)

表“guillaume_jourdain_hostabee_hives_a_hive_column”存在，我可以通过 ssh 连接从 hive 查询它。你知道我的问题来自哪里吗？如有必要，我可以向您展示我的部分代码。

4

1 回答 1

1

以下错误：

Error in semantic analysis: Line 1:15 Table not found 'guillaume_jourdain_hostabee_hives_a_hive_column'

不是由于 Cygnus 0.8.2，而是由于我们在 FIWARE 实验室的全球 Cosmos 实例中遇到的罕见行为。幸运的是，通过在表名前加上默认数据库名称（即default:)），可以轻松解决此问题。即，如果您有类似的想法：

select * from mytable;

现在你必须写：

select * from default.mytable;
于 2015-08-07T10:53:04.060 回答