使用Spark操作Hudi表详细教程_spark sql操作hudi，三面蚂蚁金服成功拿到offer

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val beginTime = commits(commits.length - 1)

val idf = spark.read.format("hudi"). option(QUERY_TYPE_OPT_KEY, QUERY_TYPE_INCREMENTAL_OPT_VAL). option(BEGIN_INSTANTTIME_OPT_KEY, beginTime). load("hdfs:///hudi/hudi_mor_tbl_shell") idf.createOrReplaceTempView("hudi_mor_tbl_shell_incremental")

spark.sql("select \_hoodie\_commit\_time, id, name, price, ts from hudi_mor_tbl_shell_incremental").show()


发现只取出了最近插入/修改后的数据。



### 修改数据

import org.apache.spark.sql._ import org.apache.spark.sql.types._ val fields = Array( StructField("id", IntegerType, true), StructField("name", StringType, true), StructField("price", DoubleType, true), StructField("ts", LongType, true) ) val simpleSchema = StructType(fields) val data = Seq(Row(2, "a2", 400.0, 2222L)) val df = spark.createDataFrame(data, simpleSchema)

df.write.format("hudi"). option(PRECOMBINE_FIELD_OPT_KEY, "ts"). option(RECORDKEY_FIELD_OPT_KEY, "id"). option(TABLE_NAME, "hudi_mor_tbl_shell"). option(TABLE_TYPE_OPT_KEY, "MERGE_ON_READ"). mode(Append). save("hdfs:///hudi/hudi_mor_tbl_shell")


验证方法使用普通查询。



### Insert overwrite

import org.apache.spark.sql._ import org.apache.spark.sql.types._ val fields = Array( StructField("id", IntegerType, true), StructField("name", StringType, true), StructField("price", DoubleType, true), StructField("ts", LongType, true) ) val simpleSchema = StructType(fields) val data = Seq(Row(99, "a99", 20.0, 900L)) val df = spark.createDataFrame(data, simpleSchema)

df.write.format("hudi"). option(OPERATION.key(),"insert_overwrite"). option(PRECOMBINE_FIELD.key(), "ts"). option(RECORDKEY_FIELD.key(), "id"). option(TBL_NAME.key(), "hudi_mor_tbl_shell"). option(TABLE_TYPE_OPT_KEY, "MERGE_ON_READ"). mode(Append). save("hdfs:///hudi/hudi_mor_tbl_shell")


验证方法使用普通查询。发现只有新增的这一条数据。



### 删除数据

import org.apache.spark.sql._ import org.apache.spark.sql.types._ val fields = Array( StructField("id", IntegerType, true), StructField("name", StringType, true), StructField("price", DoubleType, true), StructField("ts", LongType, true) ) val simpleSchema = StructType(fields) val data = Seq(Row(2, "a2", 400.0, 2222L)) val df = spark.createDataFrame(data, simpleSchema)

df.write.format("hudi"). option(OPERATION_OPT_KEY,"delete"). option(PRECOMBINE_FIELD_OPT_KEY, "ts"). option(RECORDKEY_FIELD_OPT_KEY, "id"). option(TABLE_NAME, "hudi_mor_tbl_shell"). mode(Append). save("hdfs:///hudi/hudi_mor_tbl_shell")


验证方法使用普通查询。



### Spark SQL方式


启动Hudi spark sql的方法：

./spark-sql
--master yarn
--conf 'spark.serializer=org.apache.spark.serializer.KryoSerializer'
--conf 'spark.sql.extensions=org.apache.spark.sql.hudi.HoodieSparkSessionExtension'
--conf 'spark.sql.catalog.spark_catalog=org.apache.spark.sql.hudi.catalog.HoodieCatalog'


如果使用Hudi的版本为0.11.x，需要执行：

./spark-sql
--master yarn
--conf 'spark.serializer=org.apache.spark.serializer.KryoSerializer'
--conf 'spark.sql.extensions=org.apache.spark.sql.hudi.HoodieSparkSessionExtension'


创建表：

create table hudi_mor_tbl ( id int, name string, price double, ts bigint ) using hudi tblproperties ( type = 'mor', primaryKey = 'id', preCombineField = 'ts' ) location 'hdfs:///hudi/hudi_mor_tbl';


验证：

show tables;


### 插入数据


SQL方式：

insert into hudi_mor_tbl select 1, 'a1', 20, 1000;


验证：

select * from hudi_mor_tbl;


### 普通查询


SQL方式：

select * from hudi_mor_tbl;


### 修改数据


SQL方式：

update hudi_mor_tbl set price = price * 2, ts = 1111 where id = 1;


验证：

select * from hudi_mor_tbl;


### insert overwrite


SQL方式：

insert overwrite hudi_mor_tbl select 99, 'a99', 20.0, 900;


验证：

select * from hudi_mor_tbl;


发现只有新增的这一条数据。



### 删除数据


SQL方式：

delete from hudi_mor_tbl where id % 2 = 1;


验证：

select * from hudi_mor_tbl;


### Kerberos和权限配置


例如，如果要允许Hudi用户对Hudi表进行操作，提交队列为default，表路径为hdfs:///hudi/t1，可以通过以下步骤使用Ranger进行设置：


1、在Ranger中创建一个名为hudi的用户。


2、分配给hudi用户以下目录的读写权限：/hdfs/hudi/t1，/tmp，/user/hudi。


3、赋予hudi用户对yarn default队列的权限。


如果启用了Kerberos，还需要执行以下额外步骤：


1、在Kerberos中创建hudi@PAULTECH.COM主体，并生成相应的keytab文件。


2、在执行kinit之后，确保hudi用户具有相应的权限以执行相关操作。


通过这些设置，Hudi用户应该能够在指定的表路径下执行操作，并具有必要的HDFS和YARN权限，确保了对应用程序的顺利运行。


### FAQ


**1、spark-sql或者spark-shell启动出现NoClassDefFoundError: org/apache/hadoop/shaded/javax/ws/rs/core/NoContentException**


问题日志：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/shaded/javax/ws/rs/core/NoContentException at org.apache.hadoop.yarn.util.timeline.TimelineUtils.(TimelineUtils.java:60) at org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.serviceInit(YarnClientImpl.java:200) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:164) at org.apache.spark.deploy.yarn.Client.submitApplication(Client.scala:191) at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:62) at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:222) at org.apache.spark.SparkContext.(SparkContext.scala:585) at org.apache.spark.SparkContext.getOrCreate(SparkContext.scala:2704)atorg.apache.spark.sql.SparkSession.getOrCreate(SparkContext.scala:2704) at org.apache.spark.sql.SparkSessionBuilder.anonfunanonfungetOrCreate2(SparkSession.scala:953)atscala.Option.getOrElse(Option.scala:189)atorg.apache.spark.sql.SparkSession2(SparkSession.scala:953) at scala.Option.getOrElse(Option.scala:189) at org.apache.spark.sql.SparkSessionBuilder.getOrCreate(SparkSession.scala:947) at org.apache.spark.sql.hive.thriftserver.SparkSQLEnv.init(SparkSQLEnv.scala:54)atorg.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.<init>(SparkSQLCLIDriver.scala:327)atorg.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.init(SparkSQLEnv.scala:54) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.<init>(SparkSQLCLIDriver.scala:327) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.main(SparkSQLCLIDriver.scala:159) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.main(SparkSQLCLIDriver.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) at org.apache.spark.deploy.SparkSubmit.orgapacheapachesparkdeploydeploySparkSubmitrunMain(SparkSubmit.scala:958) at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:180) at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:203) at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:90) at org.apache.spark.deploy.SparkSubmitanon2.doSubmit(SparkSubmit.scala:1046)atorg.apache.spark.deploy.SparkSubmit2.doSubmit(SparkSubmit.scala:1046) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala:1055) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.shaded.javax.ws.rs.core.NoContentException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 27 more


问题原因：Hadoop和Spark版本不匹配所致。  
 解决方案：可禁用Yarn的timeline-service。禁用方法请看环境配置。  
 参考链接：  
 <https://github.com/apache/kyuubi/issues/2904>


**2、创建表的时候出现 CreateHoodieTableCommand: Failed to create catalog table in metastore: org.apache.hudi.hadoop.realtime.HoodieParquetRealtimeInputFormat**


从原始报错看不出来是什么问题，需要增加代码：


hudi-spark-datasource/hudi-spark-common/src/main/scala/org/apache/spark/sql/hudi/command/CreateHoodieTableCommand.scala


85行左右修改为：

case NonFatal(e) => { logWarning(s"Failed to create catalog table in metastore: e.getMessage")logWarning(s"Failedtocreatecatalogtableinmetastore:{e.getMessage}") logWarning(s"Failed to create catalog table in metastore: {e.getClass}") logWarning(s"Failed to create catalog table in metastore: ${e.getStackTrace.mkString("Array(", ", ", ")")}") }


编译替换后再次运行。可看到更为详细的报错日志：  
 org.apache.hudi.hadoop.realtime.HoodieParquetRealtimeInputFormat。经过查找，发现这个class在hudi-hadoop-mr-bundle包中。  
 **将Hudi编译后的hudi-hadoop-mr-bundle-0.13.1.jar放入到hive安装目录的lib或者auxlib中。重启Hive metastore服务后恢复正常。**


**3、spark-sql或者spark-shell命令太长，每次都要加入Hudi必须的conf配置，可否简化**  
 有办法简化，可以将Hudi的配置加入到spark-defaults.conf配置文件中。例如对于Hudi 0.13.1版本可在spark-defaults.conf中加入：

spark.serializer=org.apache.spark.serializer.KryoSerializer spark.sql.catalog.spark_catalog=org.apache.spark.sql.hudi.catalog.HoodieCatalog spark.sql.extensions=org.apache.spark.sql.hudi.HoodieSparkSessionExtension


修改之后在启动spark-shell只需要执行：

./spark-shell --master yarn


对于spark-sql，执行：

./spark-sql --master yarn


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