hadoop3.3.0(hadoop3.0)

初始化Schema成功，bin/hive可以启动但报错，show databses报错。在hive.log中可以查看到有如下报错信息:

2022-03-15T09:24:48,812  WARN [d60a091b-11f4-4c6b-991e-7ff21f9cfc5a main] metastore.ObjectStore: datanucleus.autoStartMechanismMode is set to unsupported value null . Setting it to value: ignored
2022-03-15T09:24:48,818 ERROR [d60a091b-11f4-4c6b-991e-7ff21f9cfc5a main] metastore.RetryingHMSHandler: java.lang.NoSuchMethodError: org.apache.hadoop.conf.Configuration.getPassword(Ljava/lang/String;)[C
        at org.apache.hadoop.hive.metastore.conf.metastoreConf.getPassword(metastoreConf.java:1537)
        at org.apache.hadoop.hive.metastore.ObjectStore.getDataSourceProps(ObjectStore.java:606)
        at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:349)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.(RawStoreProxy.java:59)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67)
        at org.apache.hadoop.hive.metastore.HivemetaStore$HMSHandler.newRawStoreForConf(HivemetaStore.java:718)
        at org.apache.hadoop.hive.metastore.HivemetaStore$HMSHandler.getMSForConf(HivemetaStore.java:696)
        at org.apache.hadoop.hive.metastore.HivemetaStore$HMSHandler.getMS(HivemetaStore.java:690)
        at org.apache.hadoop.hive.metastore.HivemetaStore$HMSHandler.createDefaultDB(HivemetaStore.java:767)
        at org.apache.hadoop.hive.metastore.HivemetaStore$HMSHandler.init(HivemetaStore.java:538)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:147)

java.lang.NoSuchMethodError: org.apache.hadoop.conf.Configuration.getPassword(Ljava/lang/String;)[C

问题

之前学习Hbase时在$HADOOP_HOMME/etc/hadoop/hadoop-env.sh中HADOOP_CLASSPATH配置了Habse中的bin目录，导致在运行Hive跑mr任务时找到的是habse中相关Hadoop的jar包，这也导致启动运行时报版本冲突错误。

解决方法

修改hadoop-env.sh，如下：

export HADOOP_CLASSPATH=.:$CLASSPATH:$HADOOP_CLASSPATH:$HADOOP_HOME/bin