Hive启动报错

报错一：

Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /tmp/hive/wzj/1285d7ee-00f3-42a0-9161-03660fcb6a86. Name node is in safe mode.

[wzj@hadoop001 ~]$ jps
2197 NameNode
2486 SecondaryNameNode
2630 ResourceManager
2743 NodeManager
2935 Jps
2318 DataNode
[wzj@hadoop001 ~]$ hive
which: no hbase in (/home/wzj/app/hive/bin:/home/wzj/app/hadoop/bin:/home/wzj/app/hadoop/sbin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/wzj/.local/bin:/home/wzj/bin)
19/12/21 11:21:44 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Logging initialized using configuration in jar:file:/home/wzj/app/hive-1.1.0-cdh5.16.2/lib/hive-common-1.1.0-cdh5.16.2.jar!/hive-log4j.properties
Exception in thread "main" java.lang.RuntimeException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /tmp/hive/wzj/1285d7ee-00f3-42a0-9161-03660fcb6a86. Name node is in safe mode.
The reported blocks 20 has reached the threshold 0.9990 of total blocks 20. The number of live datanodes 1 has reached the minimum number 0. In safe mode extension. Safe mode will be turned off automatically in 4 seconds.
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkNameNodeSafeMode(FSNamesystem.java:1529)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:4530)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:4505)
	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:884)
	at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.mkdirs(AuthorizationProviderProxyClientProtocol.java:328)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:641)
	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2278)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2274)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2272)

	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:586)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:534)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:695)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:634)
	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:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:226)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:141)
Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /tmp/hive/wzj/1285d7ee-00f3-42a0-9161-03660fcb6a86. Name node is in safe mode.
The reported blocks 20 has reached the threshold 0.9990 of total blocks 20. The number of live datanodes 1 has reached the minimum number 0. In safe mode extension. Safe mode will be turned off automatically in 4 seconds.
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkNameNodeSafeMode(FSNamesystem.java:1529)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInt(FSNamesystem.java:4530)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:4505)
	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:884)
	at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.mkdirs(AuthorizationProviderProxyClientProtocol.java:328)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:641)
	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2278)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2274)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2272)

	at org.apache.hadoop.ipc.Client.call(Client.java:1504)
	at org.apache.hadoop.ipc.Client.call(Client.java:1441)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:231)
	at com.sun.proxy.$Proxy11.mkdirs(Unknown Source)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.mkdirs(ClientNamenodeProtocolTranslatorPB.java:575)
	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:497)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:258)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104)
	at com.sun.proxy.$Proxy12.mkdirs(Unknown Source)
	at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:3155)
	at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:3122)
	at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:1005)
	at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:1001)
	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
	at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirsInternal(DistributedFileSystem.java:1001)
	at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:993)
	at org.apache.hadoop.hive.ql.session.SessionState.createPath(SessionState.java:715)
	at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:640)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:562)
	... 9 more

报错信息显示namenode进入安全模式，所以查看一下namenode的日志

 INFO org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor: Scanned 0 directive(s) and 0 block(s) in 1 millisecond(s).
 WARN org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:wzj (auth:SIMPLE) cause:org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot create directory /tmp/hive/wzj/1285d7ee-00f3-42a0-9161-03660fcb6a86. Name node is in safe mode.
The reported blocks 20 has reached the threshold 0.9990 of total blocks 20. The number of live datanodes 1 has reached the minimum number 0. In safe mode extension. Safe mode will be turned off automatically in 4 seconds.
 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 9000, call org.apache.hadoop.hdfs.protocol.ClientProtocol.mkdirs from  Call#4 Retry#0: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot create directory /tmp/hive/wzj/1285d7ee-00f3-42a0-9161-03660fcb6a86. Name node is in safe mode.
The reported blocks 20 has reached the threshold 0.9990 of total blocks 20. The number of live datanodes 1 has reached the minimum number 0. In safe mode extension. Safe mode will be turned off automatically in 4 seconds.

解决：
既然namenode进入安全模式，那就让它退出安全模式不就行了

[wzj@hadoop001 ~]$ hdfs dfsadmin -safemode leave
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Safe mode is OFF
[wzj@hadoop001 ~]$ hive
which: no hbase in (/home/wzj/app/hive/bin:/home/wzj/app/hadoop/bin:/home/wzj/app/hadoop/sbin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/wzj/.local/bin:/home/wzj/bin)
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Logging initialized using configuration in jar:file:/home/wzj/app/hive-1.1.0-cdh5.16.2/lib/hive-common-1.1.0-cdh5.16.2.jar!/hive-log4j.properties
WARNING: Hive CLI is deprecated and migration to Beeline is recommended.
hive (default)>

ok!已进入

报错二：

hive (default)> show databases;
FAILED: SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
hive (default)>

报错无法实例化，metadata有问题，ok,那就去看一下元数据的库

[mysqladmin@hadoop001 ~]$ service mysql status
ERROR! MySQL is not running, but lock file (/var/lock/subsys/mysql) exists

发现mysql的服务没有启，那就启动一下吧

[mysqladmin@hadoop001 ~]$ service mysql start
Starting MySQL… SUCCESS!
[mysqladmin@hadoop001 ~]$ service mysql status
SUCCESS! MySQL running (4136)

重新启动一下Hive吧

[wzj@hadoop001 ~]$ hive
which: no hbase in (/home/wzj/app/hive/bin:/home/wzj/app/hadoop/bin:/home/wzj/app/hadoop/sbin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/wzj/.local/bin:/home/wzj/bin)
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Logging initialized using configuration in jar:file:/home/wzj/app/hive-1.1.0-cdh5.16.2/lib/hive-common-1.1.0-cdh5.16.2.jar!/hive-log4j.properties
WARNING: Hive CLI is deprecated and migration to Beeline is recommended.
hive (default)> show databases;
OK
database_name
default
wzj
Time taken: 6.53 seconds, Fetched: 2 row(s)
hive (default)> use wzj;
OK
Time taken: 0.035 seconds
hive (wzj)> select * from tset;
OK
tset.id	tset.name
1	jerry
Time taken: 0.904 seconds, Fetched: 1 row(s)
hive (wzj)> 

ok 没有问题