hive 启动时报错: Exception in thread "main" java.lang.RuntimeException: java.lang.

might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'.
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient

        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)

出现这种错误可能有两个原因:

第一是hadoop 的hdfs和yarn没有启动。

第二是缺少 mysql-connection-java.jar 包。在search.maven里下载该jar包导入到hive/lib中,再启动hive

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