Question

我正在使用Fiware Cosmos的共享实例（意味着我没有root权限）。直到今天，我一直使用jdbc和Hive CLI远程成功地在hive中访问和管理表。但是现在我在启动Hive CLI时遇到了这个错误：

log4j:ERROR Could not instantiate class [org.apache.hadoop.hive.shims.HiveEventCounter].
java.lang.RuntimeException: Could not load shims in class org.apache.hadoop.log.metrics.EventCounter
    at org.apache.hadoop.hive.shims.ShimLoader.createShim(ShimLoader.java:123)
    at org.apache.hadoop.hive.shims.ShimLoader.loadShims(ShimLoader.java:115)
    at org.apache.hadoop.hive.shims.ShimLoader.getEventCounter(ShimLoader.java:98)
    at org.apache.hadoop.hive.shims.HiveEventCounter.<init>(HiveEventCounter.java:34)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.Class.newInstance0(Class.java:357)
    at java.lang.Class.newInstance(Class.java:310)
    at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:330)
    at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:121)
    at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:664)
    at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:647)
    at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:544)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:440)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:476)
    at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:354)
    at org.apache.hadoop.hive.common.LogUtils.initHiveLog4jDefault(LogUtils.java:127)
    at org.apache.hadoop.hive.common.LogUtils.initHiveLog4jCommon(LogUtils.java:77)
    at org.apache.hadoop.hive.common.LogUtils.initHiveLog4j(LogUtils.java:58)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:641)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)
    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.ClassNotFoundException: org.apache.hadoop.log.metrics.EventCounter
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:171)
    at org.apache.hadoop.hive.shims.ShimLoader.createShim(ShimLoader.java:120)
    ... 27 more
log4j:ERROR Could not instantiate appender named "EventCounter".

Logging initialized using configuration in jar:file:/usr/local/apache-hive-0.13.0-bin/lib/hive-common-0.13.0.jar!/hive-log4j.properties

然而，我可以在Hive CLI中执行select和create。如果我然后尝试远程访问Hive，我明白了：

Connecting to jdbc:hive://x.x.x.x:10000/default?user=user&password=XXXXXXXXXX
Could not establish connection: java.net.ConnectException: Connection refused

在错误出现之前，我没有对代码或命令进行任何更改，在谷歌搜索后我找不到任何有效的解决方案。

如果有人能指导我到问题所在的地方，或者如何找到它，或者更好地解决问题，我将不胜感激。

提前致谢！

Answer 1

HiveServer2 （Hive JDBC服务）是一个非常不稳定的软件。在我们的Prod集群中，我们每天都有一个CRON作业来重新启动每个实例，即便如此，有时它会导致OutOfMemory错误，然后就像你展示的那样挂起Connection refused。打开一张Hadoop管理员的门票，以便他/她重新启动该死的服务。

另一方面，org.apache.hadoop.log.metrics.EventCounter消息闻起来有人试图在某处更改共享配置（或尝试升级某些JAR），现在Hive认为它运行在非常非常旧的Hadoop版本< / p>

=＆GT;例如Hive-4133或MapR support post

中的评论

Answer 2

这些问题的原因是宇宙中的Hive升级。这里有一个更全面的解释和解决方案：

My Hive client stopped working with Cosmos instance

Fiware Cosmos Hive授权问题

2 个答案: