忽略独立集群中通过REST作业提交的spark.master配置。

Question

我有一个独立的星火集群在HA模式(2个硕士)和两个工人在那里注册。

我通过REST接口提交了火花作业，并提供了以下细节，

{
    "sparkProperties": {
        "spark.app.name": "TeraGen3",
        "spark.default.parallelism": "40",
        "spark.executor.memory": "512m",
        "spark.driver.memory": "512m",
        "spark.task.maxFailures": "3",
        "spark.jars": "file:///tmp//test//spark-terasort-1.1-SNAPSHOT-jar-with-dependencies.jar",
        "spark.eventLog.enabled": "false",
        "spark.submit.deployMode": "cluster",
        "spark.driver.supervise": "true",
        "spark.master": "spark://spark-hn0:7077,spark-hn1:7077"
    },
    "mainClass": "com.github.ehiggs.spark.terasort.TeraGen",
    "environmentVariables": {
        "SPARK_ENV_LOADED": "1"
    },
    "action": "CreateSubmissionRequest",
    "appArgs": ["4g", "file:///tmp/data/teradata4g/"],
    "appResource": "file:///tmp//test//spark-terasort-1.1-SNAPSHOT-jar-with-dependencies.jar",
    "clientSparkVersion": "2.1.1"
}

此请求通过REST接口(http://spark-hn1:6066/v1/submissions/create)提交给Active Spark。

当驱动程序启动时，-Dspark.master被设置为“星火://火花-hn1:7077”，而不是在sparkProperties中传递的值，即“sparkProperties://火花-hn0:7077，火花-hn1:7077”。

从正在运行驱动程序的工作节点记录

17/12/18 13:29:49 INFO worker.DriverRunner: Launch Command: "/usr/lib/jvm/java-8-openjdk-amd64/bin/java" "-Dhdp.version=2.6.99.200-0" "-cp" "/usr/hdp/current/spark2-client/conf/:/usr/hdp/current/spark2-client/jars/*:/etc/hadoop/conf/" "-Xmx512M" "-Dspark.driver.memory=51
2m" "-Dspark.master=spark://spark-hn1:7077" "-Dspark.executor.memory=512m" "-Dspark.submit.deployMode=cluster" "-Dspark.app.name=TeraGen3" "-Dspark.default.parallelism=40" "-Dspark.jars=file:///tmp//test//spark-terasort-1.1-SNAPSHOT-jar-with-dependencies.jar" "-Dspark.ta
sk.maxFailures=3" "-Dspark.driver.supervise=true" "-Dspark.eventLog.enabled=false" "org.apache.spark.deploy.worker.DriverWrapper" "spark://Worker@172.18.0.4:40803" "/var/spark/work/driver-20171218132949-0001/spark-terasort-1.1-SNAPSHOT-jar-with-dependencies.jar" "com.git
hub.ehiggs.spark.terasort.TeraGen" "4g" "file:///tmp/data/teradata4g/"

这给我带来了问题，因为在作业执行期间，活动的主程序会掉下来，而另一个主程序会变得活跃。因为驱动程序只知道一个主(旧的)，所以它无法到达新的主程序并继续作业执行(从spark.driver.supervise=true开始)。

在Spark接口中传递多个主urls的正确方法是什么？

Answer 1

看起来这是RestServer实现中的一个bug，spark.master正在被替换。https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/rest/StandaloneRestServer.scala#L147

我们仍然可以通过在spark.master中设置spark.driver.extraJavaOptions来解决这个问题，同时通过REST接口提交作业，如下所示

"sparkProperties": {
        "spark.app.name": "TeraGen3",
        ...
        "spark.driver.extraJavaOptions": "-Dspark.master=spark://spark-hn0:7077,spark-hn1:7077"
    }

这对我有用。