ulysses-you commented on code in PR #38779:
URL: https://github.com/apache/spark/pull/38779#discussion_r1044175147
##########
core/pom.xml:
##########
@@ -616,6 +621,48 @@
</execution>
</executions>
</plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-shade-plugin</artifactId>
Review Comment:
@gengliangwang It actually conflicts with parent pom.xml which causes the
jetty can not be shaded into spark-core. The current master branch can not
start Spark UI, see error message:
```
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use
setLogLevel(newLevel).
22/12/09 14:58:54 WARN NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/Scheduler
at org.apache.spark.ui.SparkUI.<init>(SparkUI.scala:67)
at org.apache.spark.ui.SparkUI$.create(SparkUI.scala:223)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:484)
at org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2739)
at
org.apache.spark.sql.SparkSession$Builder.$anonfun$getOrCreate$2(SparkSession.scala:978)
at scala.Option.getOrElse(Option.scala:189)
at
org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:972)
at org.apache.spark.repl.Main$.createSparkSession(Main.scala:106)
... 55 elided
Caused by: java.lang.ClassNotFoundException:
org.eclipse.jetty.util.thread.Scheduler
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
... 63 more
<console>:14: error: not found: value spark
import spark.implicits._
^
```
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