问题
I am using spark 2.4.1 version and java8. I am trying to load external property file while submitting my spark job using spark-submit.
As I am using below TypeSafe to load my property file.
<groupId>com.typesafe</groupId>
<artifactId>config</artifactId>
<version>1.3.1</version>
In my spark driver class MyDriver.java I am loading the YML file as below
String ymlFilename = args[1].toString();
Optional<QueryEntities> entities = InputYamlProcessor.process(ymlFilename);
I have all code here including InputYamlProcessor.java
https://gist.github.com/BdLearnerr/e4c47c5f1dded951b18844b278ea3441
This is working fine in my local but when I run on cluster this gives error
Error :
Can't construct a java object for tag:yaml.org,2002:com.snp.yml.QueryEntities; exception=Class not found: com.snp.yml.QueryEntities
in 'reader', line 1, column 1:
entities:
^
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:345)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:127)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:450)
at org.yaml.snakeyaml.Yaml.loadAs(Yaml.java:444)
at com.snp.yml.InputYamlProcessor.process(InputYamlProcessor.java:62)
Caused by: org.yaml.snakeyaml.error.YAMLException: Class not found: com.snp.yml.QueryEntities
at org.yaml.snakeyaml.constructor.Constructor.getClassForNode(Constructor.java:650)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.getConstructor(Constructor.java:331)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:341)
... 12 more
My spark job script is
$SPARK_HOME/bin/spark-submit \
--master yarn \
--deploy-mode cluster \
--name MyDriver \
--jars "/local/jars/*.jar" \
--files hdfs://files/application-cloud-dev.properties,hdfs://files/column_family_condition.yml \
--class com.sp.MyDriver \
--executor-cores 3 \
--executor-memory 9g \
--num-executors 5 \
--driver-cores 2 \
--driver-memory 4g \
--driver-java-options -Dconfig.file=./application-cloud-dev.properties \
--conf spark.executor.extraJavaOptions=-Dconfig.file=./application-cloud-dev.properties \
--conf spark.driver.extraClassPath=. \
--driver-class-path . \
ca-datamigration-0.0.1.jar application-cloud-dev.properties column_family_condition.yml
What am I doing wrong here? How to fix this issue ? Any fix is highly thankful.
Tested :
I printed something like this inside the class , before the line where getting above... to check if the issue is really class not found.
public static void printTest() {
QueryEntity e1 = new QueryEntity();
e1.setTableName("tab1");
List<QueryEntity> li = new ArrayList<QueryEntity>();
li.add(e1);
QueryEntities ll = new QueryEntities();
ll.setEntitiesList(li);
ll.getEntitiesList().stream().forEach(e -> logger.error("e1 Name :" + e.getTableName()));
return;
}
Output :
19/09/18 04:40:33 ERROR yml.InputYamlProcessor: e1 Name :tab1
Can't construct a java object for tag:yaml.org,2002:com.snp.helpers.QueryEntities; exception=Class not found: com.snp.helpers.QueryEntities
in 'reader', line 1, column 1:
entitiesList:
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:345)
What is wrong here ?
回答1:
This has got nothing to do with QueryEntities i.e. YAMLException: Class not found: com.snp.yml.QueryEntities
is YML constructor issue
Changed To
Yaml yaml = new Yaml(new CustomClassLoaderConstructor(com.snp.helpers.QueryEntities.class.getClassLoader()));
From
/*Constructor constructor = new Constructor(com.snp.helpers.QueryEntities.class);
Yaml yaml = new Yaml( constructor );*/
来源:https://stackoverflow.com/questions/57960569/passing-external-yml-file-in-my-spark-job-code-not-working-throwing-cant-const