原文标题：

【Hive】ERROR exec.DDLTask: java.lang.UnsatisfiedLinkError: org.apache.hadoop.util.NativeCrc32.nati...

1/在$HADOOP_HOME/lib/native下面放了2.5.0-native-snappy.tar.gz，这是HDFS存储压缩所需的本地lib包。
cd ~/app/hadoop-2.5.0-cdh5.3.6/lib/native/

2/执行命令hadoop checknative

18/06/23 07:23:36 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Native library checking:
hadoop:  truezlib:    truesnappy:  truelz4:     truebzip2:   trueopenssl: false

3/但是， hive命令进入hive的命令行，执行show tables之类的操作时，报如下错误：

ERROR exec.DDLTask: java.lang.UnsatisfiedLinkError: org.apache.hadoop.util.NativeCrc32.nativeComputeChunkedSumsByteArray(II[BI[BIILjava/lang/String;JZ)V

4/原因：由于放入的lib包版本问题，暂时先把它们删除吧。
再次进入hive中，执行命令OK。

5/执行hive -hiveconf hive.root.logger=DEBUG,console，发现还是有错误。
暂时没有去解决，但是不影响功能。

InvalidObjectException(message:Role admin already exists.)
        at org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3051)
        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:606)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
        at com.sun.proxy.$Proxy5.addRole(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultRoles(HiveMetaStore.java:555)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:409)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:367)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:55)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:60)
        at org.apache.hadoop.hive.metastore.HiveMetaStore.newHMSHandler(HiveMetaStore.java:4994)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:175)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1424)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:63)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:73)
        at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2625)
        at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2644)
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:365)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:689)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:633)
        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:606)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:212)18/06/23 07:31:08 [main]: INFO metastore.HiveMetaStore: Added admin role in metastore18/06/23 07:31:08 [main]: DEBUG metastore.ObjectStore: Open transaction: count = 1, isActive = true at:
        org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3048)18/06/23 07:31:08 [main]: DEBUG metastore.ObjectStore: Open transaction: count = 2, isActive = true at:
        org.apache.hadoop.hive.metastore.ObjectStore.getMRole(ObjectStore.java:3327)18/06/23 07:31:08 [main]: DEBUG metastore.ObjectStore: Commit transaction: count = 1, isactive true at:
        org.apache.hadoop.hive.metastore.ObjectStore.getMRole(ObjectStore.java:3333)18/06/23 07:31:08 [main]: DEBUG metastore.ObjectStore: Rollback transaction, isActive: true at:
        org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3061)18/06/23 07:31:08 [main]: DEBUG metastore.HiveMetaStore: public role already exists
InvalidObjectException(message:Role public already exists.)
        at org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3051)
        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:606)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
        at com.sun.proxy.$Proxy5.addRole(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultRoles(HiveMetaStore.java:564)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:409)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:367)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:55)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:60)
        at org.apache.hadoop.hive.metastore.HiveMetaStore.newHMSHandler(HiveMetaStore.java:4994)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:175)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1424)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:63)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:73)
        at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2625)
        at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2644)
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:365)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:689)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:633)
        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:606)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

作者：sparkle123
链接：https://www.jianshu.com/p/d2d0e1aeb910