Github user wangyum commented on a diff in the pull request:
https://github.com/apache/spark/pull/22861#discussion_r228992409
--- Diff:
external/avro/src/test/scala/org/apache/spark/sql/execution/benchmark/AvroWriteBenchmark.scala
---
@@ -19,22 +19,17 @@ package org.apache.spark.sql.execution.benchmark
/**
* Benchmark to measure Avro data sources write performance.
- * Usage:
- * 1. with spark-submit: bin/spark-submit --class <this class> <spark sql
test jar>
- * 2. with sbt: build/sbt "avro/test:runMain <this class>"
+ * To run this benchmark:
+ * {{{
+ * 1. without sbt: bin/spark-submit --class <this class>
--- End diff --
I hint an exception when run:
```
bin/spark-submit --class
org.apache.spark.sql.execution.benchmark.AvroWriteBenchmark --jars
./core/target/spark-core_2.11-3.0.0-SNAPSHOT-tests.jar,./sql/catalyst/target/spark-catalyst_2.11-3.0.0-SNAPSHOT-tests.jar,./sql/core/target/spark-sql_2.11-3.0.0-SNAPSHOT-tests.jar
./external/avro/target/spark-avro_2.11-3.0.0-SNAPSHOT-tests.jar
```
```
Exception in thread "main" org.apache.spark.sql.AnalysisException: Failed
to find data source: Avro. Avro is built-in but external data source module
since Spark 2.4. Please deploy the application as per the deployment section of
"Apache Avro Data Source Guide".;
at
org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:647)
at
org.apache.spark.sql.execution.datasources.DataSource.providingClass$lzycompute(DataSource.scala:94)
at
org.apache.spark.sql.execution.datasources.DataSource.providingClass(DataSource.scala:93)
at
org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:313)
at
org.apache.spark.sql.execution.command.CreateDataSourceTableCommand.run(createDataSourceTables.scala:78)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:70)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:68)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.executeCollect(commands.scala:79)
at org.apache.spark.sql.Dataset$$anonfun$6.apply(Dataset.scala:195)
at org.apache.spark.sql.Dataset$$anonfun$6.apply(Dataset.scala:195)
......
```
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