Hadoop常见异常及其解决方案 分类： A1_HADOOP 2014-07-09 15:02 4187人阅读 评论(0) 收藏

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}

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