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