1、下面配置配置错误的话会导致flink任务无法连接resourcemanger

job会提交失败，报错内容：

flink on yarn Connecting to ResourceManager at /0.0.0.0:8030

解决方案：

    <property>
        <name>yarn.application.classpath</name>
        <value>$HADOOP_CONF_DIR,$HADOOP_COMMON_HOME/share/hadoop/common/*,$HADOOP_HOME/lib/*,
            $HADOOP_COMMON_HOME/share/hadoop/common/lib/*,
            $HADOOP_HDFS_HOME/share/hadoop/hdfs/*,$HADOOP_HDFS_HOME/share/hadoop/hdfs/lib/*,
            $YARN_HOME/share/hadoop/yarn/*,$YARN_HOME/share/hadoop/yarn/lib/*,
            $YARN_HOME/share/hadoop/mapreduce/*,$YARN_HOME/share/hadoop/mapreduce/lib/*,
$HADOOP_HOME/share/hadoop/common/lib/*,$HADOOP_HOME/share/hadoop/common/*,$HADOOP_HOME/share/hadoop/hdfs/*,$HADOOP_HOME/share/hadoop/hdfs/lib/*,$HADOOP_HOME/share/hadoop/mapreduce/*,$HADOOP_HOME/share/hadoop/mapreduce/lib/*,$HADOOP_HOME/share/hadoop/yarn/lib/*,$HADOOP_HOME/share/hadoop/yarn/*,$HADOOP_HOME/share/hadoop/tools/lib/*,$HADOOP_HOME/share/hadoop/tools/*
        </value>
    </property>

2、测试：

./bin/flink run-application -t yarn-application -Dyarn.application.name=wordcount -c org.apache.flink.streaming.examples.wordcount.WordCount ./examples/streaming/WordCount.jar --input hdfs://jy/tmp/input --output hdfs://jy/tmp/output

./bin/flink run -m yarn-cluster ./examples/batch/WordCount.jar