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Hadoop常见异常及其解决方案

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发表于 2015-4-27 18:29:51 |显示全部楼层
hadoop常见异常及其解决方案
1、Shell$ExitCodeException
现象:运行hadoop job时出现如下异常:
14/07/09 14:42:50 INFO mapreduce.Job: Task Id : attempt_1404886826875_0007_m_000000_1, Status : FAILED
Exception from container-launch: org.apache.hadoop.util.Shell$ExitCodeException:
org.apache.hadoop.util.Shell$ExitCodeException:
        at org.apache.hadoop.util.Shell.runCommand(Shell.Java:505)
        at org.apache.hadoop.util.Shell.run(Shell.java:418)
        at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
        at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:195)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:300)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:81)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)

Container exited with a non-zero exit code 1

原因及解决办法:原因未知。重启可恢复正常

2、libhadoop.so.1.0.0 which might have disabled stack guard
现象:Hadoop 2.2.0 - warning: You have loaded library /home/hadoop/2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard.
原因及解决方法:
在/etc/profile中添加:
#hadoop configuration
export PATH=$PATH:/home/jediael/hadoop-2.4.1/bin:/home/jediael/hadoop-2.4.1/sbin
export HADOOP_HOME=/home/jediael/hadoop-2.4.1
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_YARN_HOME=$HADOOP_HOME
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

此警告出现的原因是最后2项未添加。

3、Retrying connect to server: master166/10.252.48.166:9000. Already tried 0 time(s)
在datanode上执行hdfs相关命令时,出现以下错误:
[jediael@slave156 ~]$ hadoop fs -ls /
14/08/31 15:00:37 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:38 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:39 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:40 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:41 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:42 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:43 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 6 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:44 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:45 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/08/31 15:00:46 INFO ipc.Client: Retrying connect to server: master166/10.252.48.166:9000. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
ls: Call to master166/10.252.48.166:9000 failed on connection exception: java.net.ConnectException: Connection refused

出现以上错误,通常都是由于datanode无法连接到namenode所致,以下是一种情况:
/etc/hosts中存在127.0.0.1 *****的配置,如
127.0.0.1 localhost
将这些配置去掉,然后重新格式化namenode,并重启hadoop进程即可解决。
或者是以下原因:

hadoop安装完成后,必须要用haddop namenode format格式化后,才能使用,如果重启机器
在启动hadoop后,用hadoop fs -ls命令老是报 10/09/25 18:35:29 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:9000. Already tried 0 time(s).的错误,
用jps命令,也看不不到namenode的进程, 必须再用命令hadoop namenode format格式化后,才能再使用
    原因是:hadoop默认配置是把一些tmp文件放在/tmp目录下,重启系统后,tmp目录下的东西被清除,所以报错
    解决方法:在conf/core-site.xml 中增加以下内容
   <property>
   <name>hadoop.tmp.dir</name>
   <value>/var/log/hadoop/tmp</value>
  <description>A base for other temporary directories</description>
  </property>
  重启hadoop后,格式化namenode即可


4、Permission denied: user=liaoliuqing, Access=WRITE, inode="":jediael:supergroup:rwxr-xr-x
原因为用户权限不足,能能访写HDFS中的文件。
解决方案:

关闭hadoop权限,在hdfs-site.xml文件中添加
<property>   
<name>dfs.permissions</name>   
<value>false</value>   
</property>

5、Incompatible namespaceIDs
2015-02-02 15:10:57,526 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2015-02-02 15:10:57,543 INFO org.apache.hadoop.metrics2.impl.MetriCssourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
2015-02-02 15:10:57,543 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2015-02-02 15:10:57,544 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started
2015-02-02 15:10:57,699 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
2015-02-02 15:10:58,090 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /mnt/tmphadoop/dfs/data: namenode namespaceID = 2017454015; datanode namespaceID = 1238467850
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:232)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:147)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:414)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:321)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1712)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1651)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1669)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1795)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1812)

问题原因:
每次namenode format会重新创建一个namenodeId,而${hadoop.tmp.dir}/dfs/data下包含了上次format下的id,当重新执行namenode format时清空了namenode下的数据,但是没有清空datanode下的数据,所以造成namenode节点上的namespaceID与 datanode节点上的namespaceID不一致,从而导致从现上述异常,启动失败。


解决办法:
(1)停止hadoop
stop-all.sh
(2)在各个slave中删除dfs.data.dir中的内容。若此属性未修改,则其默认值为
<property>
  <name>${dfs.data.dir}</name>
  <value>${hadoop.tmp.dir}/dfs/data</value>
  <description>Determines where on the local filesystem an DFS data node
  should store its blocks.  If this is a comma-delimited
  list of directories, then data will be stored in all named
  directories, typically on different devices.
  Directories that do not exist are ignored.
  </description>
</property>
(3)重新格式化namenode
hadoop namenode -format
然后start-all.sh启动hadoop

以上解决办法需要将原有数据删除,若数据不能删除,则使用以下方法之一:
(1)修改${dfs.data.dir}/current/VERSION文件,将datanode中的id改成与namenode中的id一致。
(2)修改${dfs.data.dir}
Hadoop常见异常及其解决方案
http://blog.csdn.net/jediael_lu/article/details/37598727
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