Hive启动出现：Name node is in safe mode

1.解决方法

Exception in thread “main” java.lang.RuntimeException: org.apache.hadoop.ipc.R
emoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create directory /tmp/hive/root/6b8123ac-7e03-4579-a1da-21b09992fe1b. Name node is in safe mode.Resources are low on NN. Please add or free up more resources then turn off sa
fe mode manually. NOTE: If you turn off safe mode before adding resources, the NN will immediately return to safe mode. Use “hdfs dfsadmin -safemode leave” to turn safe mode off. at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkNameNodeSa
feMode(FSNamesystem.java:1327) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesy
stem.java:3893) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(Nam
eNodeRpcServer.java:983) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideT
ranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:622) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$
ClientNamenodeProtocol $2 . c a l l B l o c k i n g M e t h o d (C l i e n t N a m e n o d e P r o t o c o l P r o t o s . j a v a) a t o r g . a p a c h e . h a d o o p . i p c . P r o t o b u f R p c E n g i n e$ Server $P r o t o B u f R p c I n v o k e r . c a l l (P r o t o b u f R p c E n g i n e . j a v a : 616) a t o r g . a p a c h e . h a d o o p . i p c . R P C$ Server.call(RPC.java:969)
at org.apache.hadoop.ipc.Server$Handler $1 . r u n (S e r v e r . j a v a : 2049) a t o r g . a p a c h e . h a d o o p . i p c . S e r v e r$ Handler $1 . r u n (S e r v e r . j a v a : 2045) a t j a v a . s e c u r i t y . A c c e s s C o n t r o l l e r . d o P r i v i l e g e d (N a t i v e M e t h o d) a t j a v a x . s e c u r i t y . a u t h . S u b j e c t . d o A s (S u b j e c t . j a v a : 422) a t o r g . a p a c h e . h a d o o p . s e c u r i t y . U s e r G r o u p I n f o r m a t i o n . d o A s (U s e r G r o u p I n f o r m a t i o n . j a v a : 1657) a t o r g . a p a c h e . h a d o o p . i p c . S e r v e r$ Handler.run(Server.java:2043)

at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.j

ava:651) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionSt
ate.java:591) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:747)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:683)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImp
l.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcc
essorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server
.namenode.SafeModeException): Cannot create directory /tmp/hive/root/6b8123ac-7e03-4579-a1da-21b09992fe1b. Name node is in safe mode.Resources are low on NN. Please add or free up more resources then turn off sa
fe mode manually. NOTE: If you turn off safe mode before adding resources, the NN will immediately return to safe mode. Use “hdfs dfsadmin -safemode leave” to turn safe mode off. at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkNameNodeSa
feMode(FSNamesystem.java:1327) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesy
stem.java:3893) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(Nam
eNodeRpcServer.java:983) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideT
ranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:622) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$
ClientNamenodeProtocol $2 . c a l l B l o c k i n g M e t h o d (C l i e n t N a m e n o d e P r o t o c o l P r o t o s . j a v a) a t o r g . a p a c h e . h a d o o p . i p c . P r o t o b u f R p c E n g i n e$ Server $P r o t o B u f R p c I n v o k e r . c a l l (P r o t o b u f R p c E n g i n e . j a v a : 616) a t o r g . a p a c h e . h a d o o p . i p c . R P C$ Server.call(RPC.java:969)
at org.apache.hadoop.ipc.Server$Handler $1 . r u n (S e r v e r . j a v a : 2049) a t o r g . a p a c h e . h a d o o p . i p c . S e r v e r$ Handler $1 . r u n (S e r v e r . j a v a : 2045) a t j a v a . s e c u r i t y . A c c e s s C o n t r o l l e r . d o P r i v i l e g e d (N a t i v e M e t h o d) a t j a v a x . s e c u r i t y . a u t h . S u b j e c t . d o A s (S u b j e c t . j a v a : 422) a t o r g . a p a c h e . h a d o o p . s e c u r i t y . U s e r G r o u p I n f o r m a t i o n . d o A s (U s e r G r o u p I n f o r m a t i o n . j a v a : 1657) a t o r g . a p a c h e . h a d o o p . i p c . S e r v e r$ Handler.run(Server.java:2043)

at org.apache.hadoop.ipc.Client.call(Client.java:1475)
at org.apache.hadoop.ipc.Client.call(Client.java:1412)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcE

ngine.java:229) at com.sun.proxy. $P r o x y 28 . m k d i r s (U n k n o w n S o u r c e) a t o r g . a p a c h e . h a d o o p . h d f s . p r o t o c o l P B . C l i e n t N a m e n o d e P r o t o c o l T r a n s l a t o r P B . m k d i r s (C l i e n t N a m e n o d e P r o t o c o l T r a n s l a t o r P B . j a v a : 558) a t s u n . r e f l e c t . N a t i v e M e t h o d A c c e s s o r I m p l . i n v o k e 0 (N a t i v e M e t h o d) a t s u n . r e f l e c t . N a t i v e M e t h o d A c c e s s o r I m p l . i n v o k e (N a t i v e M e t h o d A c c e s s o r I m p l . j a v a : 62) a t s u n . r e f l e c t . D e l e g a t i n g M e t h o d A c c e s s o r I m p l . i n v o k e (D e l e g a t i n g M e t h o d A c c e s s o r I m p l . j a v a : 43) a t j a v a . l a n g . r e f l e c t . M e t h o d . i n v o k e (M e t h o d . j a v a : 498) a t o r g . a p a c h e . h a d o o p . i o . r e t r y . R e t r y I n v o c a t i o n H a n d l e r . i n v o k e M e t h o d (R e t r y I n v o c a t i o n H a n d l e r . j a v a : 191) a t o r g . a p a c h e . h a d o o p . i o . r e t r y . R e t r y I n v o c a t i o n H a n d l e r . i n v o k e (R e t r y I n v o c a t i o n H a n d l e r . j a v a : 102) a t c o m . s u n . p r o x y .$ Proxy29.mkdirs(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:3000
) at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:2970)
at org.apache.hadoop.hdfs.DistributedFileSystem$21.doCall(DistributedF
ileSystem.java:1047) at org.apache.hadoop.hdfs.DistributedFileSystem$21.doCall(DistributedF
ileSystem.java:1043) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkR
esolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirsInternal(Distrib
utedFileSystem.java:1043) at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFile
System.java:1036) at org.apache.hadoop.hive.ql.session.SessionState.createPath(SessionSt
ate.java:786) at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(Se
ssionState.java:721) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.j
ava:627) … 9 more

1.解决方法

一行代码解决：

hadoop dfsadmin -safemode leave

Hive启动报错：Name node is in safe mode。

Hive启动出现：Name node is in safe mode

1.解决方法

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