Eclipse上传文件到HDFS为空

本帖最后由 Kevin517 于 2016-10-15 20:30 编辑

问题说明：在 Eclipse 中 Upload files to DFS ，上传成功后，在 eclipse 中打开文件，为空。运行单词统计案例，就没有结果。
环境说明：

采用云平台中的两台云主机搭建的 master 和 slaver 作为 Namenode 和 Datanode 集群。
云平台使用 GRE 网络。内网为 10.0.0.0/24；外网为192.168.200.0/24
两个节点通过内网（10.0.0.0/24 ）通信。windows通过云主机的 floatIP （192.168.200.0/24）连接。

Hadoop 版本为 Hadoop 2.7.0
IP如下：

master	192.168.200.105	10.0.0.7
slaver	192.168.200.106	10.0.0.8
windows 7 （Kevin）	192.168.200.5

集群使用 root 用户搭建，以 root 用户启动 hadoop
集群启动正常，两个节点进程启动成功，日志无错误输出。

windows上访问 192.168.200.105:50070，网页正常打开。检查 namenode 和 datanode 信息正常。
windows上访问 192.168.200.105::8088，网页打开正常。检查 Yarn 正常。

在 master 对 HDFS 操作正常。
并且执行
[size=13.3333px][root@master mapreduce]# hadoop jar hadoop-mapreduce-examples-2.7.0.jar wordcount /input /output可以正常运行，正常输出。

MapReduce

================================================================

问题描述：

windows 上 Eclipse 搭建Hadoop开发环境成功。
但是在创建成功 input 文件夹后，上传文件，也能上传成功。就是成功后，文件没有信息。
然后运行案例。控制台正常输出运行过程信息。没有报错。也输出了统计结果。
因为上传文件没有内容，所以统计结果也没有信息。

WordCount

上面截图是运行成功截图。

======================================================

下面贴出重新上传到 input/ 目录的时候  namenode 的日志：hadoop-root-namenode-master.log

两个时间
以下，是运行案例的日志。

2016-10-15 07:52:49,692 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:05,544 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:05,545 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 9000, call org.apache.hadoop.hdfs.protocol.ClientProtocol.getBlockLocations from 192.168.100.8:8819 Call#7 Retry#0: java.io.FileNotFoundException: File does not exist: /input/wordtest.txt
2016-10-15 07:59:17,400 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:18,082 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:18,084 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:19,813 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:30,958 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:31,146 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:31,168 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:31,439 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:31,440 INFO org.apache.hadoop.hdfs.server.namenode.FSEditLog: Number of transactions: 16 Total time for transactions(ms): 1 Number of transactions batched in Syncs: 0 Number of syncs: 10 SyncTimes(ms): 412
2016-10-15 07:59:31,790 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:31,840 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,028 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,074 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,084 INFO org.apache.hadoop.hdfs.StateChange: DIR* completeFile: /output/_temporary/0/_temporary/attempt_local29653720_0001_r_000000_0/part-r-00000 is closed by DFSClient_NONMAPREDUCE_-1631979872_1
2016-10-15 07:59:32,088 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,092 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,093 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,096 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,110 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,112 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,113 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,115 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,118 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,130 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,138 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,145 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:32,151 INFO org.apache.hadoop.hdfs.StateChange: DIR* completeFile: /output/_SUCCESS is closed by DFSClient_NONMAPREDUCE_-1631979872_1
2016-10-15 07:59:42,822 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,665 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,667 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,667 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,668 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,668 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,669 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,669 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,670 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,671 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 07:59:43,672 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:00:26,501 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:00:28,220 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin

以下，是重新上传文件的日志。

2016-10-15 08:04:32,059 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:04:32,060 INFO org.apache.hadoop.hdfs.server.namenode.FSEditLog: Number of transactions: 26 Total time for transactions(ms): 1 Number of transactions batched in Syncs: 0 Number of syncs: 18 SyncTimes(ms): 482
2016-10-15 08:04:32,099 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:04:39,188 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:04:39,214 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:04:39,215 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1073741843_1019{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-20957220-9bf2-463a-88aa-88ed2446fd42:NORMAL:10.0.0.7:50010|RBW], ReplicaUC[[DISK]DS-a461d256-df88-473f-b0f8-08c7221a794b:NORMAL:10.0.0.8:50010|RBW]]} for /input/word.txt
2016-10-15 08:05:00,252 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:05:00,280 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:05:00,281 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 2 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
2016-10-15 08:05:00,281 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=2, selected=[], unavailable=[DISK], removed=[DISK], policy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})
2016-10-15 08:05:00,281 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 2 (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) All required storage types are unavailable:  unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
2016-10-15 08:05:00,282 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1073741844_1020{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-a461d256-df88-473f-b0f8-08c7221a794b:NORMAL:10.0.0.8:50010|RBW]]} for /input/word.txt
2016-10-15 08:05:21,298 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:05:21,320 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
2016-10-15 08:05:21,321 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 2 to reach 2 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
2016-10-15 08:05:21,321 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 2 but only 0 storage types can be selected (replication=2, selected=[], unavailable=[DISK], removed=[DISK, DISK], policy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})
2016-10-15 08:05:21,321 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 2 to reach 2 (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) All required storage types are unavailable:  unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
2016-10-15 08:05:21,321 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 9000, call org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock from 192.168.100.8:9029 Call#33 Retry#0
java.io.IOException: File /input/word.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 2 datanode(s) running and 2 node(s) are excluded in this operation.
      at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1550)
      at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3067)
      at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:722)
      at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
      at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
      at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:415)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

[root@master logs]#

下面是重新上传后查看 HDFS 目录

[root@master ~]# hdfs dfs -ls /
Found 1 items
drwxr-xr-x - Kevin supergroup       0 2016-10-15 08:23 /input

[root@master ~]# hdfs dfs -ls /input
Found 1 items
-rw-r--r-- 3 Kevin supergroup       0 2016-10-15 08:23 /input/word.txt
[root@master ~]#

===================================================

希望，能帮忙分析以下。万分感谢。

arsenduan · 发表于 2016-10-15 21:08:11

[root@master ~]# hdfs dfs -ls /
Found 1 items
drwxr-xr-x - Kevin supergroup 0 2016-10-15 08:23 /input

[root@master ~]# hdfs dfs -ls /input
Found 1 items
-rw-r--r-- 3 Kevin supergroup 0 2016-10-15 08:23 /input/word.txt
[root@master ~]#

应该是word.txt权限不够，给他授权下。应该是权限不够，导致读取失败

easthome001 · 发表于 2016-10-16 08:03:45

File /input/word.txt could only be replicated to 0 nodes instead of minReplication (=1). There are 2 datanode(s) running and 2 node(s) are excluded in this operation.

这里说明，你的datanode可能有挂掉的，到各个节点上看看，进程是否还在，是否有僵尸进程。最好重启下

easthome001 · 发表于 2016-10-16 08:10:07

方法一：
在core-site.xml里面添加如下配置：

<property>
<name>hadoop.http.staticuser.user</name>
<value>Kevin</value>
</property>

另外一个方法，在当前的用户组里面添加一个dr.who的用户
gpasswd -a dr.who hadoop
将dr.who用户添加到hadoop用户组里面

如此就能通过linux的权限验证，改完之后，重启hadoop集群之后，就不会出现这样的警告了

qcbb001 · 发表于 2016-10-16 08:12:00

hdfs-site.xml
里面

是否设置为false了

Kevin517 · 发表于 2016-10-16 08:38:49

easthome001 发表于 2016-10-16 08:03
File /input/word.txt could only be replicated to 0 nodes instead of minReplication (=1). There are ...

datanode应该不会出问题，要不然我在 namenode 节点用命令行 mkdir ,put 文件，执行# hadoop jar hadoop-mapreduce-examples-2.7.0.jar wordcount /input /output应该不会成功。但是做成功了

Kevin517 · 发表于 2016-10-16 08:41:46

qcbb001 发表于 2016-10-16 08:12
hdfs-site.xml
里面

设置过的

<configuration>
<property>
  <name>dfs.namenode.name.dir</name>
  <value>file:///home/hadoop/dfs/name</value>
</property>
<property>
  <name>dfs.datanode.data.dir</name>
  <value>file:///home/hadoop/dfs/data</value>
</property>
<property>
  <name>dfs.replication</name>
  <value>3</value>
</property>
<property>
  <name>dfs.namenode.secondary.http-address</name>
  <value>master:50090</value>
</property>
<property>
  <name>dfs.webhdfs.enabled</name>
  <value>true</value>
</property>
<property>
  <name>dfs.permissions</name>
  <value>false</value>
</property>
</configuration>

Kevin517 · 发表于 2016-10-16 09:14:37

easthome001 发表于 2016-10-16 08:10
方法一：
在core-site.xml里面添加如下配置：

你好，方法一，我试了，不行。

然后我在 root 组里面同时添加了 dr.who 用户和 Kevin 用户。然后重新上传晚间。

namenode的日志如下

2016-10-15 21:13:09,688 INFO org.apache.hadoop.hdfs.server.namenode.FSEditLog: Number of transactions: 23 Total time for transactions(ms): 105 Number of transactions batched in Syncs: 0 Number of syncs: 15 SyncTimes(ms): 193
2016-10-15 21:13:23,056 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1073741829_1005{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-7e695b37-0909-4e77-9692-8b937f8b02fa:NORMAL:10.0.0.8:50010|RBW], ReplicaUC[[DISK]DS-5c3e0bf7-72fc-4afa-91ce-9e2b73cf1d51:NORMAL:10.0.0.7:50010|RBW]]} for /input/word.txt
2016-10-15 21:13:44,079 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 2 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
2016-10-15 21:13:44,079 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=2, selected=[], unavailable=[DISK], removed=[DISK], policy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})
2016-10-15 21:13:44,079 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 2 (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) All required storage types are unavailable:  unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
2016-10-15 21:13:44,079 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocate blk_1073741830_1006{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-5c3e0bf7-72fc-4afa-91ce-9e2b73cf1d51:NORMAL:10.0.0.7:50010|RBW]]} for /input/word.txt
2016-10-15 21:14:05,110 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 2 to reach 2 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy
2016-10-15 21:14:05,110 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 2 but only 0 storage types can be selected (replication=2, selected=[], unavailable=[DISK], removed=[DISK, DISK], policy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})
2016-10-15 21:14:05,111 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 2 to reach 2 (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) All required storage types are unavailable:  unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
2016-10-15 21:14:05,111 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 9000, call org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock from 192.168.100.8:15557 Call#1748 Retry#0
java.io.IOException: File /input/word.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 2 datanode(s) running and 2 node(s) are excluded in this operation.
      at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1550)
      at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3067)
      at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:722)
      at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
      at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
      at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
      at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:415)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)

虽然没有出现 WARN org.apache.hadoop.security.UserGroupInformation: No groups available for user Kevin
但，还是有上面的那个错误。