不多说，直接上干货！
问题详情
电脑8G，目前搭建3节点的spark集群，采用YARN模式。
master分配2G，slave1分配1G,slave2分配1G。（在安装虚拟机时）
export SPARK_WORKER_MERMORY=1g （在spark-env.sh）
export JAVA_HOME=/usr/local/jdk/jdk1.8.0_60 （必须写） export SCALA_HOME=/usr/local/scala/scala-2.10.5 （必须写） export HADOOP_HOME=/usr/local/hadoop/hadoop-2.6.0 （必须写） export HADOOP_CONF_DIR=/usr/local/hadoop/hadoop-2.6.0/etc/hadoop （必须写） export SPARK_MASTER_IP=192.168.80.10 export SPARK_WORKER_MERMORY=1G （官网上说，至少1g）
其实这个问题解决办法很简单，就是3个节点的是，你的内存最好还是大点。如master分配4G，slave1分配2G,slave2分配2G！！！！（尽可能的大）
当然，很多博友们，跟我的情况是一样的，在学校阶段，电脑只有8g已经是最大电脑内存限制了。
一般是由于有多个用户同时向集群提交任务或一个用户向集群同时提交了多个任务导致Yarn资源的分配错误。解决这个问题，只需要更改Hadoop的配置文件：/etc/hadoop/conf/capacity-scheduler.xml，把选项：yarn.scheduler.capacity.maximum-am-resource-percent从0.1改成0.5。顾名思义，这个选项是增加Yarn可调度的资源量，当然也可以视具体情况增加更多。也可见，默认情况下，Yarn没有将很多资源分配给任务的能力。
具体，见
Spark on YARN模式的安装（spark-1.6.1-bin-hadoop2.6.tgz + hadoop-2.6.0.tar.gz）（master、slave1和slave2）（博主推荐）
[spark@master logs]$ $SPARK_HOME/bin/spark-submit > --class org.apache.spark.examples.JavaSparkPi > --master yarn-cluster > --num-executors 1 > --driver-memory 512m > --executor-memory 512m > --executor-cores 1 > /usr/local/spark/spark-1.6.1-bin-hadoop2.6/lib/spark-examples-1.6.1-hadoop2.6.0.jar
注意：
driver-memory不指定也可以，默认使用512M
executor-memory不指定的化， 默认是1G
executor-memory不指定的化， 默认是1G
17/04/09 17:03:55 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 17/04/09 17:03:55 INFO client.RMProxy: Connecting to ResourceManager at master/192.168.80.10:8032 17/04/09 17:03:56 INFO yarn.Client: Requesting a new application from cluster with 2 NodeManagers 17/04/09 17:03:56 INFO yarn.Client: Verifying our application has not requested more than the maximum memory capability of the cluster (8192 MB per container) 17/04/09 17:03:56 INFO yarn.Client: Will allocate AM container, with 896 MB memory including 384 MB overhead 17/04/09 17:03:56 INFO yarn.Client: Setting up container launch context for our AM 17/04/09 17:03:56 INFO yarn.Client: Setting up the launch environment for our AM container 17/04/09 17:03:56 INFO yarn.Client: Preparing resources for our AM container 17/04/09 17:03:59 INFO yarn.Client: Uploading resource file:/usr/local/spark/spark-1.6.1-bin-hadoop2.6/lib/spark-assembly-1.6.1-hadoop2.6.0.jar -> hdfs://master:9000/user/spark/.sparkStaging/application_1491728358337_0001/spark-assembly-1.6.1-hadoop2.6.0.jar 17/04/09 17:04:19 INFO yarn.Client: Uploading resource file:/usr/local/spark/spark-1.6.1-bin-hadoop2.6/lib/spark-examples-1.6.1-hadoop2.6.0.jar -> hdfs://master:9000/user/spark/.sparkStaging/application_1491728358337_0001/spark-examples-1.6.1-hadoop2.6.0.jar 17/04/09 17:04:49 INFO yarn.Client: Uploading resource file:/tmp/spark-d152ed1b-09ca-47c8-8457-58f7e52ff419/__spark_conf__6499474209714260387.zip -> hdfs://master:9000/user/spark/.sparkStaging/application_1491728358337_0001/__spark_conf__6499474209714260387.zip 17/04/09 17:04:50 INFO spark.SecurityManager: Changing view acls to: spark 17/04/09 17:04:50 INFO spark.SecurityManager: Changing modify acls to: spark 17/04/09 17:04:50 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(spark); users with modify permissions: Set(spark) 17/04/09 17:04:50 INFO yarn.Client: Submitting application 1 to ResourceManager 17/04/09 17:04:51 INFO impl.YarnClientImpl: Submitted application application_1491728358337_0001 17/04/09 17:04:52 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:52 INFO yarn.Client: client token: N/A diagnostics: N/A ApplicationMaster host: N/A ApplicationMaster RPC port: -1 queue: default start time: 1491728691236 final status: UNDEFINED tracking URL: http://master:8088/proxy/application_1491728358337_0001/ user: spark 17/04/09 17:04:53 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:54 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:55 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:56 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:57 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:58 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:04:59 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:00 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:01 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:02 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:03 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:04 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:05 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:06 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) 17/04/09 17:05:07 INFO yarn.Client: Application report for application_1491728358337_0001 (state: ACCEPTED) ^C17/04/09 17:05:08 INFO util.ShutdownHookManager: Shutdown hook called 17/04/09 17:05:08 INFO util.ShutdownHookManager: Deleting directory /tmp/spark-d152ed1b-09ca-47c8-8457-58f7e52ff419
.........
然后最后失败
问题分析
其实，这一情况，是我刚开始启动了太多的Application导致累积，使得内存超出了导致！
解决方法
按照办法1，办法2，办法3...的顺序来
办法1:（一般能解决）
先，
[spark@master ~]$ cd $SPARK_HOME
[spark@master spark-1.6.1-bin-hadoop2.6]$ sbin/stop-all.sh
[spark@master spark-1.6.1-bin-hadoop2.6]$ cd $HADOOP_HOME
[spark@master hadoop-2.6.0]$ sbin/stop-all.sh
再，
[spark@master spark-1.6.1-bin-hadoop2.6]$ cd $HADOOP_HOME
[spark@master hadoop-2.6.0]$ sbin/start-all.sh
[spark@master ~]$ cd $SPARK_HOME
[spark@master spark-1.6.1-bin-hadoop2.6]$ sbin/start-all.sh
在spark-env.sh，至少得
export SPARK_WORKER_MERMORY=1G
改成
[spark@master spark-1.6.1-bin-hadoop2.6]$ $SPARK_HOME/bin/spark-submit
--class org.apache.spark.examples.JavaSparkPi
--master yarn-cluster
--num-executors 1
--driver-memory 1g
--executor-memory 1g
--executor-cores 1
$SPARK_HOME/lib/spark-examples-1.6.1-hadoop2.6.0.jar
[spark@master spark-1.6.1-bin-hadoop2.6]$ $SPARK_HOME/bin/spark-submit --class org.apache.spark.examples.JavaSparkPi --master yarn-cluster --num-executors 1 --driver-memory 1g --executor-memory 1g --executor-cores 1 $SPARK_HOME/lib/spark-examples-1.6.1-hadoop2.6.0.jar
17/04/09 20:01:26 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
17/04/09 20:01:27 INFO client.RMProxy: Connecting to ResourceManager at master/192.168.80.10:8032
17/04/09 20:01:31 INFO yarn.Client: Requesting a new application from cluster with 2 NodeManagers
17/04/09 20:01:32 INFO yarn.Client: Verifying our application has not requested more than the maximum memory capability of the cluster (8192 MB per container)
17/04/09 20:01:32 INFO yarn.Client: Will allocate AM container, with 1408 MB memory including 384 MB overhead
17/04/09 20:01:32 INFO yarn.Client: Setting up container launch context for our AM
17/04/09 20:01:32 INFO yarn.Client: Setting up the launch environment for our AM container
17/04/09 20:01:32 INFO yarn.Client: Preparing resources for our AM container
17/04/09 20:01:37 INFO yarn.Client: Uploading resource file:/usr/local/spark/spark-1.6.1-bin-hadoop2.6/lib/spark-assembly-1.6.1-hadoop2.6.0.jar -> hdfs://master:9000/user/spark/.sparkStaging/application_1491735225663_0006/spark-assembly-1.6.1-hadoop2.6.0.jar
17/04/09 20:01:57 INFO yarn.Client: Uploading resource file:/usr/local/spark/spark-1.6.1-bin-hadoop2.6/lib/spark-examples-1.6.1-hadoop2.6.0.jar -> hdfs://master:9000/user/spark/.sparkStaging/application_1491735225663_0006/spark-examples-1.6.1-hadoop2.6.0.jar
17/04/09 20:02:18 INFO yarn.Client: Uploading resource file:/tmp/spark-8d8662b1-6410-4b72-9751-57bb0e2785d0/__spark_conf__5191259430263541003.zip -> hdfs://master:9000/user/spark/.sparkStaging/application_1491735225663_0006/__spark_conf__5191259430263541003.zip
17/04/09 20:02:18 INFO spark.SecurityManager: Changing view acls to: spark
17/04/09 20:02:19 INFO spark.SecurityManager: Changing modify acls to: spark
17/04/09 20:02:19 INFO spark.SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(spark); users with modify permissions: Set(spark)
17/04/09 20:02:22 INFO yarn.Client: Submitting application 6 to ResourceManager
17/04/09 20:02:23 INFO impl.YarnClientImpl: Submitted application application_1491735225663_0006
17/04/09 20:02:25 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:25 INFO yarn.Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: N/A
ApplicationMaster RPC port: -1
queue: default
start time: 1491739342315
final status: UNDEFINED
tracking URL: http://master:8088/proxy/application_1491735225663_0006/
user: spark
17/04/09 20:02:26 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:32 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:35 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:36 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:37 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:38 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:39 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:42 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:43 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:44 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:45 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:46 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:47 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:48 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:49 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:50 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:51 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:53 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:54 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:02:55 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
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17/04/09 20:04:40 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:41 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:43 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:44 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:45 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:46 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:47 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:48 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:49 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:50 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:51 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:52 INFO yarn.Client: Application report for application_1491735225663_0006 (state: ACCEPTED)
17/04/09 20:04:53 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING) 只要最后出现这个了，就说明成功了！
17/04/09 20:04:53 INFO yarn.Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: 192.168.80.11
ApplicationMaster RPC port: 0
queue: default
start time: 1491739342315
final status: UNDEFINED
tracking URL: http://master:8088/proxy/application_1491735225663_0006/
user: spark
17/04/09 20:04:54 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:04:55 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:04:56 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:04:57 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:04:58 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:04:59 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:00 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:01 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:02 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:04 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:05 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:06 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:07 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:08 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:09 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:10 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:11 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:12 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:13 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:14 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:15 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:16 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:17 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:19 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:20 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:21 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:22 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:23 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:25 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:26 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:27 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:28 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:29 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:30 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:31 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:32 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:33 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:34 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:35 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:36 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:37 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:38 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:39 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:40 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:41 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:42 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:43 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:44 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:45 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:46 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:05:47 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
....
17/04/09 20:06:57 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:06:58 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:06:59 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:07:00 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:07:01 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:07:02 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:07:03 INFO yarn.Client: Application report for application_1491735225663_0006 (state: RUNNING)
17/04/09 20:07:04 INFO yarn.Client: Application report for application_1491735225663_0006 (state: FINISHED)
17/04/09 20:07:04 INFO yarn.Client:
client token: N/A
diagnostics: N/A
ApplicationMaster host: 192.168.80.11
ApplicationMaster RPC port: 0
queue: default
start time: 1491739342315
final status: SUCCEEDED
tracking URL: http://master:8088/proxy/application_1491735225663_0006/A
user: spark
17/04/09 20:07:04 INFO yarn.Client: Deleting staging directory .sparkStaging/application_1491735225663_0006
17/04/09 20:07:07 INFO util.ShutdownHookManager: Shutdown hook called
17/04/09 20:07:07 INFO util.ShutdownHookManager: Deleting directory /tmp/spark-8d8662b1-6410-4b72-9751-57bb0e2785d0
[spark@master spark-1.6.1-bin-hadoop2.6]$
如果之后，再次去执行别的jar包，出现又是无法运行了，则
spark on yarn模式里需要有时手工释放linux内存。
解决办法
方法2： 首先想到是集群中内存资源不足，可以检查下每台机器是否有足够剩余内存( free -g)；也可能是其他已经提交的Spark应用占了大部分资源；
[spark@master spark-1.6.1-bin-hadoop2.6]$ free -g total used free shared buffers cached Mem: 1 1 0 0 0 0 -/+ buffers/cache: 0 0 Swap: 1 0 1 [spark@master spark-1.6.1-bin-hadoop2.6]$
那么，就要去杀死之前那些还正在运行（多余没用）的Application。
怎么做？
进入你的$HADOOP_HOME/bin下
执行命令
[spark@master bin]$ yarn application -list
然后可以看到应用的信息
如需杀死当前某个作业，使用kill application-id的命令如下
yarn application -kill application_1437456051228_1725
方法3： 如果1>正常，我们可以看看YARN集群是否启动成功。注意“坑”可能就在这里： 即使Slave上的nodemanager进程存在，要注意检查resource manager日志，看看各个node manager是否启动成功，有些人的问题就出现在这里：进程在，但是日志显示node manager状态为UNHEALTHY，所以YARN集群能识别到的总内存资源为0。检查了UNHEALTHY的原因，是因为/tmp下一个目录被识别为bad, 因为是临时目录，把每个node manager的对应目录删掉，然后重启YARN集群，最终问题解决。
ResourceManager日志存放位置是${HADOOP_HOME}/logs/yarn-*-resourcemanager-*.log
NodeManager日志存放位置是各个NodeManager节点上${HADOOP_HOME}/logs/yarn-*-nodemanager-*.log
先，
[spark@master ~]$ cd $SPARK_HOME
[spark@master spark-1.6.1-bin-hadoop2.6]$ sbin/stop-all.sh
[spark@master spark-1.6.1-bin-hadoop2.6]$ cd $HADOOP_HOME
[spark@master hadoop-2.6.0]$ sbin/stop-all.sh
再，
[spark@master spark-1.6.1-bin-hadoop2.6]$ cd $HADOOP_HOME
[spark@master hadoop-2.6.0]$ sbin/start-all.sh
[spark@master ~]$ cd $SPARK_HOME
[spark@master spark-1.6.1-bin-hadoop2.6]$ sbin/start-all.sh
方法4：如果还是有问题的话，只能去日志文件中查看出错的异常，查看更多一些的报错信息。
但是，方法1和方法2是足够可以解决该问题的!
方法5：
除非你的内存足够，可以扩大内存。我的只是自己电脑最大才8G
方法6：
在yarn-site.xml下
<property>
<name>yarn.nodemanager.pmem-check-enabled</name>
<value>false</value>
</property>
<property>
<name>yarn.nodemanager.vmem-check-enabled</name>
<value>false</value>
</property>
具体见
http://dongxicheng.org/mapreduce-nextgen/hadoop-yarn-memory-cpu-scheduling/
【YARN中内存资源的调度和隔离】
【YARN中CPU资源的调度和隔离】
方法7：
运行hadoop的时候提示物理内存或虚拟内存溢出的解决方案running beyond physical memory或者beyond vitual memory limits
方法8
最坏的打算，就是之前有快照，回到初始位置吧！重新安装，哎
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