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Posted to reviews@spark.apache.org by "pan3793 (via GitHub)" <gi...@apache.org> on 2025/09/09 06:38:25 UTC
[PR] [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat [spark]
pan3793 opened a new pull request, #52282:
URL: https://github.com/apache/spark/pull/52282
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### What changes were proposed in this pull request?
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When `HadoopRDD.getInputFormat` fails to initialize the InputFormat, the thrown error message is not clear. This PR enhances the exception message to include the class name of InputFormat.
### Why are the changes needed?
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Improve the error message.
### Does this PR introduce _any_ user-facing change?
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Note that it means *any* user-facing change including all aspects such as new features, bug fixes, or other behavior changes. Documentation-only updates are not considered user-facing changes.
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Yes, the user would know more info from the error message.
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Before
```
spark-sql (default)> select * from i;
2025-09-09 05:52:13 ERROR SparkSQLDriver: Failed in [select * from i]
java.lang.RuntimeException: java.lang.InstantiationException
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:157)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:126)
at org.apache.spark.rdd.HadoopRDD.getInputFormat(HadoopRDD.scala:219)
at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:233)
at org.apache.spark.rdd.RDD.$anonfun$partitions$2(RDD.scala:301)
...
Caused by: java.lang.InstantiationException
at java.base/jdk.internal.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:155)
... 67 more
```
After
```
spark-sql (default)> select * from i;
2025-09-09 06:23:48 ERROR SparkSQLDriver: Failed in [select * from i]
java.lang.RuntimeException: Failed to instantiate org.apache.hadoop.mapred.FileInputFormat
at org.apache.spark.rdd.HadoopRDD.getInputFormat(HadoopRDD.scala:223)
at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:231)
at org.apache.spark.rdd.RDD.$anonfun$partitions$2(RDD.scala:301)
...
Caused by: java.lang.InstantiationException
at java.base/jdk.internal.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:155)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:126)
at org.apache.spark.rdd.HadoopRDD.getInputFormat(HadoopRDD.scala:218)
... 65 more
```
### Was this patch authored or co-authored using generative AI tooling?
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No.
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Re: [PR] [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat [spark]
Posted by "pan3793 (via GitHub)" <gi...@apache.org>.
pan3793 commented on code in PR #52282:
URL: https://github.com/apache/spark/pull/52282#discussion_r2332198235
##########
core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala:
##########
@@ -214,14 +214,13 @@ class HadoopRDD[K, V](
}
}
- protected def getInputFormat(conf: JobConf): InputFormat[K, V] = {
- val newInputFormat = ReflectionUtils.newInstance(inputFormatClass.asInstanceOf[Class[_]], conf)
+ protected def getInputFormat(conf: JobConf): InputFormat[K, V] = try {
+ ReflectionUtils.newInstance(inputFormatClass.asInstanceOf[Class[_]], conf)
.asInstanceOf[InputFormat[K, V]]
- newInputFormat match {
- case c: Configurable => c.setConf(conf)
Review Comment:
This is unnecessary, I checked the Hadoop code, `ReflectionUtils.newInstance` already does this, at least since Hadoop 0.22
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Re: [PR] [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat [spark]
Posted by "pan3793 (via GitHub)" <gi...@apache.org>.
pan3793 commented on PR #52282:
URL: https://github.com/apache/spark/pull/52282#issuecomment-3269122961
cc @LuciferYang @yaooqinn
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Re: [PR] [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat [spark]
Posted by "LuciferYang (via GitHub)" <gi...@apache.org>.
LuciferYang closed pull request #52282: [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat
URL: https://github.com/apache/spark/pull/52282
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Re: [PR] [SPARK-53531][CORE] Better error message for HadoopRDD.getInputFormat [spark]
Posted by "itskals (via GitHub)" <gi...@apache.org>.
itskals commented on PR #52282:
URL: https://github.com/apache/spark/pull/52282#issuecomment-3271525803
Thanks. This looks good to me.
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