小编Vin*_*nod的帖子

使用Python连接到Hive2时使用以下代码:

import pyhs2

with pyhs2.connect(host='localhost',
           port=10000,
           authMechanism="PLAIN",
           user='root',
           password='test',
           database='default') as conn:
with conn.cursor() as cur:
    #Show databases
    print cur.getDatabases()

    #Execute query
    cur.execute("select * from table")

    #Return column info from query
    print cur.getSchema()

    #Fetch table results
    for i in cur.fetch():
        print i

我收到以下错误:

File
"C:\Users\vinbhask\AppData\Roaming\Python\Python36\site-packages\pyhs2-0.6.0-py3.6.egg\pyhs2\connections.py",
line 7, in <module>
    from cloudera.thrift_sasl import TSaslClientTransport ModuleNotFoundError: No module named 'cloudera'

在这里和这里尝试但问题没有解决.

这是迄今为止安装的软件包:

bitarray0.8.1,certifi2017.7.27.1,chardet3.0.4,cm-api16.0.0,cx-Oracle6.0.1,future0.16.0,idna2.6,impyla0.14.0,JayDeBeApi1.1.1,JPype10.6.2,ply3.10,pure-sasl0.4.0,PyHive0.4.0,pyhs20.6.0,pyodbc4.0.17,requests2.18.4,sasl0.2.1,six1.10.0,teradata15.10.0.21,thrift0.10.0,thrift-sasl0.2.1,thriftpy0.3.9,urllib31.22

使用Impyla时出错:

Traceback (most recent call last):
File "C:\Users\xxxxx\AppData\Local\Programs\Python\Python36-32\Scripts\HiveConnTester4.py", line 1, in <module>
from impala.dbapi import connect …

参考Hive2创建一个简单的java程序连接到HIVE2服务器(不是本地)已经在eclipse的类路径中的上述链接中添加了所有提到的jar,但是当我运行代码时它会抛出一个错误:

09:42:35,580  INFO Utils:285 - Supplied authorities: hdstg-c01-edge-03:20000
09:42:35,583  INFO Utils:372 - Resolved authority: hdstg-c01-edge-03:20000
09:42:35,656  INFO HiveConnection:189 - Will try to open client transport with JDBC Uri: jdbc:hive2://hdstg-c01-edge-03:20000
FAILED: f
java.lang.NoSuchMethodError: org.apache.thrift.protocol.TProtocol.getScheme()Ljava/lang/Class;
at org.apache.hive.service.cli.thrift.TCLIService$OpenSession_args.write(TCLIService.java:1854)
at org.apache.thrift.TServiceClient.sendBase(TServiceClient.java:63)
at org.apache.hive.service.cli.thrift.TCLIService$Client.send_OpenSession(TCLIService.java:150)
at org.apache.hive.service.cli.thrift.TCLIService$Client.OpenSession(TCLIService.java:142)
at org.apache.hive.jdbc.HiveConnection.openSession(HiveConnection.java:456)
at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:178)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:105)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at testScripts.HiveJdbcClient.f(HiveJdbcClient.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:648)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:834)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1142)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:771)
at org.testng.TestRunner.run(TestRunner.java:621) …

直到昨天，我的 Web 项目都运行良好，但是今天当我启动我的 tomcat 服务器 7 时，它无法在 Eclipse 中以以下错误启动：

Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CiscoQA_Automation_Framework]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 7 more
Caused by: java.lang.NoClassDefFoundError: org/apache/logging/log4j/Logger
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.catalina.startup.WebappServiceLoader.loadServices(WebappServiceLoader.java:192)
at org.apache.catalina.startup.WebappServiceLoader.load(WebappServiceLoader.java:157)
at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1577)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1281)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:889)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5419)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.Logger
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1722)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1573)
... 19 more

在参考这里和其他几个链接之后，我清理了 WEB-INF/lib 和类路径，然后在 WEB-INF/lib 和类路径中添加了“log4j-web-2.3.jar”和“log4j-1.2.17.jar” . 我试过清理项目和 tomcat 工作目录，也没有任何效果。

<Server port="8005" shutdown="SHUTDOWN">
  <Listener …