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apache-spark - Mesos 上 Apache Spark 的自定义状态存储提供程序

问题描述

我为 Apache Spark 2.3.0 编写了自定义状态存储和状态存储提供程序，并尝试使用附加参数部署作业：

--conf spark.sql.streaming.stateStore.providerClass=com.sample.state.CustomStateStoreProvider

对于运行 Spark 作业，我使用 Marathon 和 Mesos，并且该作业在异常开始后失败：

java.lang.ClassNotFoundException: com.sample.state.CustomStateStoreProvider 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at org.apache.spark.util.Utils$.classForName(Utils.scala:235)
    at org.apache.spark.sql.execution.streaming.state.StateStoreProvider$.create(StateStore.scala:213)
    at org.apache.spark.sql.execution.streaming.StateStoreWriter$class.stateStoreCustomMetrics(statefulOperators.scala:121)
    at org.apache.spark.sql.execution.streaming.StateStoreWriter$class.metrics(statefulOperators.scala:86)
    at org.apache.spark.sql.execution.streaming.StateStoreSaveExec.metrics$lzycompute(statefulOperators.scala:251)
    at org.apache.spark.sql.execution.streaming.StateStoreSaveExec.metrics(statefulOperators.scala:251)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:58)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SparkPlanInfo$$anonfun$fromSparkPlan$1.apply(SparkPlanInfo.scala:62)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.immutable.List.map(List.scala:285)
    at org.apache.spark.sql.execution.SparkPlanInfo$.fromSparkPlan(SparkPlanInfo.scala:62)
    at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:75)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution$$anonfun$org$apache$spark$sql$execution$streaming$MicroBatchExecution$$runBatch$3.apply(MicroBatchExecution.scala:475)
    at org.apache.spark.sql.execution.streaming.ProgressReporter$class.reportTimeTaken(ProgressReporter.scala:271)
    at org.apache.spark.sql.execution.streaming.StreamExecution.reportTimeTaken(StreamExecution.scala:58)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution.org$apache$spark$sql$execution$streaming$MicroBatchExecution$$runBatch(MicroBatchExecution.scala:474)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution$$anonfun$runActivatedStream$1$$anonfun$apply$mcZ$sp$1.apply$mcV$sp(MicroBatchExecution.scala:133)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution$$anonfun$runActivatedStream$1$$anonfun$apply$mcZ$sp$1.apply(MicroBatchExecution.scala:121)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution$$anonfun$runActivatedStream$1$$anonfun$apply$mcZ$sp$1.apply(MicroBatchExecution.scala:121)
    at org.apache.spark.sql.execution.streaming.ProgressReporter$class.reportTimeTaken(ProgressReporter.scala:271)
    at org.apache.spark.sql.execution.streaming.StreamExecution.reportTimeTaken(StreamExecution.scala:58)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution$$anonfun$runActivatedStream$1.apply$mcZ$sp(MicroBatchExecution.scala:121)
    at org.apache.spark.sql.execution.streaming.ProcessingTimeExecutor.execute(TriggerExecutor.scala:56)
    at org.apache.spark.sql.execution.streaming.MicroBatchExecution.runActivatedStream(MicroBatchExecution.scala:117)
    at org.apache.spark.sql.execution.streaming.StreamExecution.org$apache$spark$sql$execution$streaming$StreamExecution$$runStream(StreamExecution.scala:279)
    at org.apache.spark.sql.execution.streaming.StreamExecution$$anon$1.run(StreamExecution.scala:189)

这是运行作业的命令：

/spark/bin/spark-submit \
    --repositories "http://127.0.0.1:80/sbt-all" \
    --packages com.sample:pipelines:0.1.0 \
    --class com.sample.TestApplication \
    --conf spark.sql.streaming.stateStore.providerClass=com.sample.state.CustomStateStoreProvider \
    /spark/examples/jars/spark-examples_2.11-2.3.0.jar

这两个类com.sample.TestApplication都com.sample.state.CustomStateStoreProvider位于com.sample:pipelines:0.1.0包中，我已经检查了好几次。如果没有该spark.sql.streaming.stateStore.providerClass参数，应用程序将启动并运行良好。

我已经尝试使用驱动程序和执行程序的附加类路径并使用--jars位于 HDFS 或通过 HTTP 的 JAR 的参数来提交作业。

PS：当我尝试在本地开始工作时，我没有任何问题，在这种情况下一切正常。

标签： apache-sparkmesosspark-structured-streaming

解决方案

好吧，一般来说，需要将spark.sql.streaming.stateStore.providerClass参数的值括在引号中：--conf spark.sql.streaming.stateStore.providerClass="com.sample.state.CustomStateStoreProvider". 没有它，值后面的空格将包含在值中，Spark 将查找com.sample.state.CustomStateStoreProvider类（在行尾带有空格符号）并且无法找到它。其他一切都很好:)

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